阅读说明：本技术 高效宽输入能量双向流动的供电电源 (High-efficiency wide-input energy bidirectional flowing power supply ) 是由 邓永红 张杨 王元 辛祯 敬昌国 杨敏 张全柱 于 2019-09-27 设计创作，主要内容包括：本发明涉及电源技术领域,公开了一种高效宽输入能量双向流动的供电电源,在该电源中储能电池组通过直流断路器与电磁干扰滤波器连接,电磁干扰滤波器通过双向直流/直流变流器与第一双向H桥变流器连接,第一双向H桥变流器通过高频变压器模块与第二双向H桥变流器连接,第二双向H桥变流器通过双向直流/交流模块与正弦波滤波器连接,正弦波滤波器与负载连接,或者通过隔离并网变压器与负载或者电网连接,第二控制系统与双向直流/交流模块连接,第一控制系统均与上述其他器件连接,第一控制系统和第二控制系统连接。本发明能适应和调节不同规格输入的电源以及能量的双向流动。(The invention relates to the technical field of power supplies, and discloses a high-efficiency wide-input-energy bidirectional-flow power supply, wherein an energy storage battery pack in the power supply is connected with an electromagnetic interference filter through a direct current breaker, the electromagnetic interference filter is connected with a first bidirectional H-bridge converter through a bidirectional direct current/direct current converter, the first bidirectional H-bridge converter is connected with a second bidirectional H-bridge converter through a high-frequency transformer module, the second bidirectional H-bridge converter is connected with a sine wave filter through a bidirectional direct current/alternating current module, the sine wave filter is connected with a load or a power grid through an isolation grid-connected transformer, a second control system is connected with the bidirectional direct current/alternating current module, the first control system is connected with other devices, and the first control system is connected with the second control system. The invention can adapt to and adjust power sources with different specifications and bidirectional flow of energy.)

1. A power supply with high efficiency and wide input energy bidirectional flow, characterized in that the power supply comprises: the system comprises an energy storage battery pack (1), a direct current breaker (2), an electromagnetic interference filter (3), a bidirectional direct current/direct current converter (4), a first bidirectional H-bridge converter (5), a high-frequency transformer module (6), a second bidirectional H-bridge converter (7), a bidirectional direct current/alternating current module (8), a sine wave filter (9), an isolation grid-connected transformer (10), a first control system (11) and a second control system (12);

the energy storage battery pack is characterized in that the positive end and the negative end of the energy storage battery pack (1) are connected with the electromagnetic interference filter (3) through the direct current circuit breaker (2), the electromagnetic interference filter (3) is connected with the bidirectional direct current/direct current converter (4), the bidirectional direct current/direct current converter (4) is connected with the first bidirectional H-bridge converter (5), the first bidirectional H-bridge converter (5) is connected with the second bidirectional H-bridge converter (7) through the high-frequency transformer module (6), the second bidirectional H-bridge converter (7) is connected with the bidirectional direct current/alternating current module (8), the bidirectional direct current/alternating current module (8) is connected with the sine wave filter (9), the sine wave filter (9) is connected with a load, or is connected with the load or a power grid through the isolation grid-connected transformer (10), the high-frequency transformer is characterized in that the first control system (11) is connected with the direct current breaker (2), the bidirectional direct current/direct current converter (4), the first bidirectional H-bridge converter (5), the second bidirectional H-bridge converter (7) and the high-frequency transformer module (6), the second control system (12) is connected with the bidirectional direct current/alternating current module (8), and the first control system (11) is connected with the second control system (12).

2. The power supply according to claim 1, characterized in that a first capacitor is connected in parallel between the electromagnetic interference filter (3) and the bidirectional dc/dc converter (4); a first inductor and a second inductor are connected in series between the upper output end of the bidirectional direct current/direct current converter (4) and the upper input end of the first bidirectional H-bridge converter (5), a second capacitor is connected in parallel between the bidirectional direct current/direct current converter (4) and the first bidirectional H-bridge converter (5), and one end of the second capacitor is connected between the first inductor and the second inductor; a third inductor is connected in series between the upper output end of the second bidirectional H-bridge converter (7) and the bidirectional direct current/alternating current module (8), a third capacitor is connected in parallel between the upper output end of the second bidirectional H-bridge converter (7) and the bidirectional direct current/alternating current module (8), and one end of the third capacitor is connected between the third inductor and the bidirectional direct current/alternating current module (8).

3. The power supply according to claim 2, wherein the bidirectional dc/dc converter (4) comprises a first switch tube and a second switch tube, wherein a collector of the first switch tube is connected to a positive electrode of the first capacitor, an emitter of the first switch tube is connected to a collector of the lower switch tube, an emitter of the second switch tube is connected to a negative electrode of the first capacitor, one end of the first inductor is connected between the first switch tube and the second switch tube, and the other end of the first inductor is connected to the second inductor and the second capacitor.

4. The power supply of claim 2, wherein the first bidirectional H-bridge converter (5) comprises a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube, collectors of the third switching tube and the fifth switching tube are connected with the second inductor, emitters of the third switching tube and the fifth switching tube are connected with collectors of the fourth switching tube and the sixth switching tube, respectively, emitters of the fourth switching tube and the sixth switching tube are connected with a cathode of the second capacitor, and an anode of the second capacitor is connected between the first inductor and the second inductor.

5. The power supply according to claim 4, wherein said high frequency transformer module (6) comprises a first winding, a second winding, a third winding, a first contactor, a second contactor and a third contactor, said first winding being present on the primary side of said high frequency transformer module (6), the secondary side of the transformer is provided with the second winding and the third winding, one end of the second winding is connected with one end of the first contactor and one end of the second contactor, the other end of the third winding is connected with one end of the third contactor, one end of the third winding is connected with the other end of the first contactor and the other end of the third contactor, the other end of the second winding is connected with the other end of the second contactor, and the other end of the second winding and the other end of the third winding are both connected with the second bidirectional H-bridge converter (7); when the first contactor is closed and the second contactor and the third contactor are both opened, the second winding and the third winding are connected in series, and when the first contactor is opened and the second contactor and the third contactor are both closed, the second winding and the third winding are connected in parallel.

6. The power supply of claim 5, wherein the second bidirectional H-bridge converter (7) comprises a seventh switch tube, an eighth switch tube, a ninth switch tube and a tenth switch tube, collectors of the seventh switch tube and the ninth switch tube are connected to the third inductor, emitters of the seventh switch tube and the ninth switch tube are connected to collectors of the eighth switch tube and the tenth switch tube, respectively, emitters of the eighth switch tube and the tenth switch tube are connected to a cathode of the third capacitor, and an anode of the third capacitor is connected to the third inductor.

7. The power supply according to claim 6, wherein one end of the first winding is connected between the third switching tube and the fourth switching tube, and the other end of the first winding is connected between the fifth switching tube and the sixth switching tube, the other end of the second winding is further connected between the seventh switching tube and the eighth switching tube, and the other end of the third winding is further connected between the ninth switching tube and the tenth switching tube.

8. The power supply according to claim 2, wherein the bidirectional dc/ac module (8) comprises an eleventh switch tube, a twelfth switch tube, a thirteenth switch tube, a fourteenth switch tube, a fifteenth switch tube and a sixteenth switch tube, wherein the collectors of the eleventh switch tube, the thirteenth switch tube and the fifteenth switch tube are all connected to the anodes of the third inductor and the third capacitor, the emitters thereof are respectively connected to the collectors of the fourteenth switch tube, the sixteenth switch tube and the twelfth switch tube, and the emitters of the fourteenth switch tube, the sixteenth switch tube and the twelfth switch tube are all connected to the cathode of the third capacitor.

9. The power supply according to claim 8, wherein the sine wave filter (9) comprises a fourth inductor, a fifth inductor, a sixth inductor, a fourth capacitor, a fifth capacitor and a sixth capacitor, one end of the fourth inductor, one end of the fifth switching tube and one end of the sixth switching tube are respectively connected between the eleventh switching tube and the fourteenth switching tube, between the thirteenth switching tube and the sixteenth switching tube and between the fifteenth switching tube and the twelfth switching tube, the other end of the fourth inductor, the other end of the fifth inductor and the other end of the sixth inductor are respectively connected with one end of the fourth capacitor, one end of the fifth capacitor and one end of the sixth capacitor, the other end of the fourth capacitor, the other end of the fifth capacitor and the other end of the sixth capacitor are all connected together, the other end of the fourth inductor, the other end of the fifth inductor and the other end of the sixth inductor are further connected with each input end of the isolation grid-connected transformer (10) and a load through a second alternating current switch respectively, and each output end of the isolation grid-connected transformer (10) is connected with the load or a power grid through a first alternating current switch.

10. The power supply according to claim 1, characterized in that when the power supply supplies energy to a load or a grid, the first control system (11) controls the bidirectional dc/dc converter (4), the first bidirectional H-bridge converter (5), the high frequency transformer module (6), and the second bidirectional H-bridge converter (7) to cause the energy storage battery pack (1) to output a first dc voltage to the bidirectional dc/ac module (8), and the second control system (12) controls the bidirectional dc/ac module (8) to convert the first dc voltage to a first ac voltage;

when the power supply stores energy, the second control system (12) controls the bidirectional direct current/alternating current module (8) to convert a second alternating current voltage provided by a load or a power grid into a second direct current voltage, and the first control system (11) controls the bidirectional direct current/direct current converter (4) and the second bidirectional H-bridge converter (7) to output the second direct current voltage to the energy storage battery pack (1).

11. The power supply according to claim 10, characterized in that when the voltage level of the energy storage battery pack (1) is in a first voltage interval and the power supply supplies energy to a load or a power grid, the first control system (11) controls the bidirectional dc/dc converter (4) to have only a conducting function and output a first dc voltage;

when the voltage level of the energy storage battery pack (1) is a second voltage interval and the power supply provides energy for a load or a power grid, the first control system (11) controls the bidirectional direct current/direct current converter (4) to be a buck chopper module, so that a first voltage interval of the energy storage battery pack (1) is stabilized at a first stabilized direct current voltage, and the value range of the first direct current voltage comprises the first stabilized direct current voltage;

the first bidirectional H-bridge converter (5) converts the first direct current voltage or the first stabilized direct current voltage into a first alternating current voltage of high-frequency alternating current pulses and supplies the first alternating current voltage to the high-frequency transformer;

when the amplitude of the first alternating voltage is a first low input voltage, the first control system (11) controls the first contactor to be closed, the second contactor and the third contactor to be opened, and the amplitude of the first alternating voltage is boosted from the first low input voltage to a first boosting voltage;

when the amplitude of the first alternating voltage is a first high input voltage, the first control system (11) controls the second contactor and the third contactor to be closed and the first contactor to be opened, and the amplitude of the first alternating voltage is boosted to a first boosting voltage from the first high input voltage;

the first control system (11) controls the second bidirectional H-bridge converter (7) to be a second fast rectification module, rectifies the first alternating current voltage of the high-frequency alternating current pulse and with the amplitude of the first amplitude-rising voltage into a first direct current output voltage, and provides the first direct current output voltage to the bidirectional direct current/alternating current module (8);

the second control system (12) controls the bidirectional direct current/alternating current module (8) to be an inversion module, and the first direct current output voltage is converted into first alternating current output voltage after being subjected to frequency conversion and speed regulation and then is output to a load, or is output to a power grid or the load through the grid-connected transformer.

12. A power supply according to claim 10, characterized in that when the power supply is storing energy, the second control system (12) controls the bidirectional dc/ac module (8) to be an ac/dc rectifier module, changing a second ac input voltage provided by the load or the grid to a second dc input voltage;

the first control system (11) controls the second bidirectional H-bridge converter (7) to convert the second direct-current input voltage into a second alternating-current voltage which is high-frequency alternating-current pulse and has amplitude of a second input voltage, and the second alternating-current voltage is supplied to the high-frequency transformer;

the first control system (11) controls the second contactor and the third contactor to be closed and the first contactor to be opened, and the amplitude of the second alternating voltage is reduced from the second input voltage to a second amplitude reduction voltage;

the first control system (11) controls the first bidirectional H-bridge converter (5) to be a first fast rectification module, and rectifies the second alternating-current voltage of the high-frequency alternating-current pulse and the amplitude of the second amplitude-reduced voltage into a second direct-current voltage;

when the voltage class of the energy storage battery pack (1) is detected to be a low-voltage interval, the first control system (11) controls the bidirectional direct current/direct current converter (4) to have a conduction function only, and the second direct current voltage is input into the energy storage battery pack (1);

when the voltage class of the energy storage battery pack (1) is detected to be a high-voltage interval, the first control system (11) controls the bidirectional direct current/direct current converter (4) to be a boost chopper module, and the second direct current voltage is boosted and then input into the energy storage battery pack (1).

Technical Field

The invention relates to the technical field of power supplies, in particular to a power supply with high efficiency and wide input energy bidirectional flow.

Background

With the continuous development of global economy and the continuous increase of world population, human beings are increasingly unable to keep away from electric energy. With the rapid development of science and technology, solar photovoltaic power generation, full utilization of wind power generation, regenerated energy, a power grid or other power supply sources are combined with full utilization of electric energy of various energy storage batteries, and the like, so that human beings face a lot of power supply problems: (1) the demand for electric energy is increasing, and with the continuous consumption of traditional fossil energy, coal, oil and natural gas, and their non-renewability, they have been impossible to meet all our power supply needs; (2) with the popularization of solar photovoltaic power generation and wind power generation, regenerated energy is fully utilized, but the generated electric energy, the regenerated energy and energy of other power supplies cannot be used up in time, all the electric energy is not enough to be fed back to a power grid in time, and meanwhile, the electric energy is urgently needed to be fully utilized due to different utilization types and different voltage grades in different regions. In addition, the regenerative energy generated in the industrial application process, the regenerative energy generated in the urban rail transit process, the energy generated by wind power generation and other ways, the energy of an energy storage battery and the like are also faced with the problems; (3) with the improvement of energy-saving consciousness of the whole society, electric energy generated in life and various production, especially various industrial production, including various solar photovoltaic and wind power generation and other power generation, can not feed back the energy of a power grid in time and is stored in various energy storage batteries, and the energy stored in the energy storage batteries is also an urgent need to solve the problem of full utilization of the energy storage batteries; (4) in the region without a power supply grid, the activities of human beings are increasing (field exploration, travel and the like), some daily power utilization requirements of the human beings are also met, and the human beings also need to be powered by energy storage batteries; (5) along with the acceleration of urbanization process, the accelerated development of intelligent house, the rapid development in wisdom city to and electric automobile's popularization, on the one hand urgently need a convenient quick power supply mode that fills and satisfy the power supply demand, electric automobile also can regard as a delivery vehicle of electric energy in addition, can make full use of the electric energy inside the electric automobile battery. To fully utilize the electric energy, or to fully utilize the electric energy in various energy storage batteries, one of the most critical problems is to: at present, the power supply range of various photovoltaic and wind power generation and energy storage battery power supplies on the market is very wide (direct current 100-. Meanwhile, bidirectional transmission of energy can be further realized, and the regenerated energy generated in industrial loads or urban rail transit and the like is fully utilized.

The main problems of the current power supply are as follows: the voltage class of the energy storage battery is divided into two power supply specifications, as shown in fig. 1 and fig. 2, namely two input voltage specification classes, i.e., dc 100-.

1. For a power supply with direct current 100-plus-600V input, a boost chopper circuit is designed to boost the input direct current 100-plus-600V power supply and stabilize the power supply to direct current 600V, the power supply is provided for an inverter, a direct load is output to a power frequency transformer, and indirect loads are a motor, a switching power supply and the like;

2. for the power supply with the direct current 600-plus-1200V input, a step-down chopper circuit is designed to step down the input direct current 600-plus-1200V power supply and stabilize the power supply to the direct current 600V, an inverter is provided, a direct load is output to a power frequency transformer, and an indirect load is a motor, a switching power supply and the like;

3. because the direct load on the output side of the power supply is the power frequency transformer, the indirect load is the motor, the switching power supply and the like, when the capacity of the power supply is 10kVA (kilovolts Ampere), the starting current requirement of the motor in the indirect load is met, when the direct current is input at 600V, the maximum current is 36A (Ampere), and thus when the lowest direct current is input at 100V, if the maximum current of the energy storage battery and the boost chopper circuit in the figure 1 is up to more than 220A, the realization of the general boost chopper circuit is difficult;

4. the two power supply sources can not realize the bidirectional flow of energy, can not store the regenerated energy in the load into the battery pack, not only wastes energy, but also consumes the regenerated energy by an external energy consumption resistor, and increases the instability of the power supply.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the high-efficiency wide-input energy bidirectional flowing power supply, which can solve the technical problems that the power supply in the prior art cannot adapt to the wide-input power supply and cannot realize bidirectional transmission of energy.

The invention provides a power supply with high efficiency and wide input energy bidirectional flow, which comprises: the system comprises an energy storage battery pack, a direct current breaker, an electromagnetic interference filter, a bidirectional direct current/direct current converter, a first bidirectional H-bridge converter, a high-frequency transformer module, a second bidirectional H-bridge converter, a bidirectional direct current/alternating current module, a sine wave filter, an isolation grid-connected transformer, a first control system and a second control system;

the positive and negative ends of the energy storage battery pack are connected with the electromagnetic interference filter through the direct current breaker, the electromagnetic interference filter is connected with the bidirectional direct current/direct current converter, the bidirectional direct current/direct current converter is connected with the first bidirectional H-bridge converter, the first bidirectional H-bridge converter is connected with the second bidirectional H-bridge converter through the high-frequency transformer module, the second bidirectional H-bridge converter is connected with the bidirectional direct current/alternating current module, the bidirectional direct current/alternating current module is connected with the sine wave filter, the sine wave filter is connected with a load or connected with a power grid through the isolation grid-connected transformer, the first control system is connected with the direct current breaker, the bidirectional direct current/direct current converter, the first bidirectional H-bridge converter, the electromagnetic interference filter, the high-frequency transformer module, the first bidirectional DC/alternating current module, the sine wave filter, the first, The second bidirectional H-bridge converter is connected with the high-frequency transformer module, the second control system is connected with the bidirectional direct current/alternating current module, and the first control system is connected with the second control system.

Optionally, a first capacitor is connected in parallel between the electromagnetic interference filter and the bidirectional dc/dc converter; a first inductor and a second inductor are connected in series between the upper output end of the bidirectional direct current/direct current converter and the upper input end of the first bidirectional H-bridge converter, a second capacitor is connected in parallel between the bidirectional direct current/direct current converter and the first bidirectional H-bridge converter, and one end of the second capacitor is connected between the first inductor and the second inductor; a third inductor is connected in series between the upper output end of the second bidirectional H-bridge converter and the bidirectional dc/ac module, a third capacitor is connected in parallel between the upper output end of the second bidirectional H-bridge converter and the bidirectional dc/ac module, and one end of the third capacitor is connected between the third inductor and the bidirectional dc/ac module.

Optionally, the bidirectional dc/dc converter includes a first switch tube and a second switch tube, a collector of the first switch tube is connected to a positive electrode of the first capacitor, an emitter of the first switch tube is connected to a collector of the lower switch tube, an emitter of the second switch tube is connected to a negative electrode of the first capacitor, one end of the first inductor is connected between the first switch tube and the second switch tube, and the other end of the first inductor is connected to the second inductor and the second capacitor.

Optionally, the first bidirectional H-bridge converter includes a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube, collectors of the third switching tube and the fifth switching tube are all connected to the second inductor, emitters of the third switching tube and the fifth switching tube are respectively connected to collectors of the fourth switching tube and the sixth switching tube, emitters of the fourth switching tube and the sixth switching tube are all connected to a negative electrode of the second capacitor, and a positive electrode of the second capacitor is connected between the first inductor and the second inductor.

Optionally, the high-frequency transformer module includes a first winding, a second winding, a third winding, a first contactor, a second contactor, and a third contactor, the first winding is disposed on the primary side of the high-frequency transformer module, the second winding and the third winding are disposed on the secondary side of the high-frequency transformer module, one end of the second winding is connected to one end of the first contactor and one end of the second contactor, the other end of the second winding is connected to one end of the third contactor, one end of the third winding is connected to the other end of the first contactor and the other end of the third contactor, the other end of the third winding is connected to the other end of the second contactor, and the other end of the second winding and the other end of the third winding are both connected to the second bidirectional H-bridge converter; when the first contactor is closed and the second contactor and the third contactor are both opened, the second winding and the third winding are connected in series, and when the first contactor is opened and the second contactor and the third contactor are both closed, the second winding and the third winding are connected in parallel.

Optionally, the second bidirectional H-bridge converter includes a seventh switching tube, an eighth switching tube, a ninth switching tube, and a tenth switching tube, collectors of the seventh switching tube and the ninth switching tube are all connected to the third inductor, emitters of the seventh switching tube and the ninth switching tube are respectively connected to collectors of the eighth switching tube and the tenth switching tube, emitters of the eighth switching tube and the tenth switching tube are all connected to a negative electrode of the third capacitor, and a positive electrode of the third capacitor is connected to the third inductor.

Optionally, one end of the first winding is connected between the third switching tube and the fourth switching tube, the other end of the first winding is connected between the fifth switching tube and the sixth switching tube, the other end of the second winding is further connected between the seventh switching tube and the eighth switching tube, and the other end of the third winding is further connected between the ninth switching tube and the tenth switching tube.

Optionally, the bidirectional dc/ac module includes an eleventh switching tube, a twelfth switching tube, a thirteenth switching tube, a fourteenth switching tube, a fifteenth switching tube and a sixteenth switching tube, collectors of the eleventh switching tube, the thirteenth switching tube and the fifteenth switching tube are all connected to anodes of the third inductor and the third capacitor, emitters of the eleventh switching tube, the thirteenth switching tube and the fifteenth switching tube are respectively connected to collectors of the fourteenth switching tube, the sixteenth switching tube and the twelfth switching tube, and emitters of the fourteenth switching tube, the sixteenth switching tube and the twelfth switching tube are all connected to a cathode of the third capacitor.

Optionally, the sine wave filter includes a fourth inductor, a fifth inductor, a sixth inductor, a fourth capacitor, a fifth capacitor and a sixth capacitor, one end of the fourth inductor, one end of the fifth switching tube and one end of the sixth switching tube are respectively connected between the eleventh switching tube and the fourteenth switching tube, between the thirteenth switching tube and the sixteenth switching tube and between the fifteenth switching tube and the twelfth switching tube, the other end of the fourth inductor, the other end of the fifth inductor and the other end of the sixth inductor are respectively connected with one end of the fourth capacitor, one end of the fifth capacitor and one end of the sixth capacitor, the other end of the fourth capacitor, the other end of the fifth capacitor and the other end of the sixth capacitor are all connected together, the other end of the fourth inductor, the other end of the fifth inductor and the other end of the sixth inductor are respectively connected with the input ends of the isolation grid-connected transformer and the load through a second alternating current switch, and the output ends of the isolation grid-connected transformer are connected with the load or the power grid through a first alternating current switch.

Optionally, when the power supply supplies energy to a load or a power grid, the first control system controls the bidirectional dc/dc converter, the first bidirectional H-bridge converter, the high-frequency transformer module, and the second bidirectional H-bridge converter to enable the energy storage battery pack to output a first dc voltage to the bidirectional dc/ac module, and the second control system controls the bidirectional dc/ac module to convert the first dc voltage into a first ac voltage;

when the power supply stores energy, the second control system controls the bidirectional direct current/alternating current module to convert a second alternating current voltage provided by a load or a power grid into a second direct current voltage, and the first control system controls the bidirectional direct current/direct current converter and the second bidirectional H-bridge converter to output the second direct current voltage to the energy storage battery pack.

Optionally, when the voltage level of the energy storage battery pack is in a first voltage interval and the power supply supplies energy to a load or a power grid, the first control system controls the bidirectional dc/dc converter to have only a conduction function and output a first dc voltage;

when the voltage level of the energy storage battery pack is in a second voltage interval and the power supply provides energy for a load or a power grid, the first control system controls the bidirectional direct current/direct current converter to be a buck chopper module to stabilize a first voltage interval of the energy storage battery pack at a first stable direct current voltage, and the value range of the first direct current voltage comprises the first stable direct current voltage;

the first bidirectional H-bridge converter converts the first direct-current voltage or the first stabilized direct-current voltage into a first alternating-current voltage of high-frequency alternating-current pulses and supplies the first alternating-current voltage to the high-frequency transformer;

when the amplitude of the first alternating-current voltage is a first low input voltage, the first control system controls the first contactor to be closed and the second contactor and the third contactor to be opened, and the amplitude of the first alternating-current voltage is boosted to a first amplitude boosting voltage from the first low input voltage;

when the amplitude of the first alternating-current voltage is a first high input voltage, the first control system controls the second contactor and the third contactor to be closed and the first contactor to be opened, and the amplitude of the first alternating-current voltage is boosted to a first amplitude boosting voltage from the first high input voltage;

the first control system controls the second bidirectional H-bridge converter to be a second fast rectification module, rectifies the first alternating-current voltage with high-frequency alternating-current pulses and amplitude of the first amplitude voltage into a first direct-current output voltage, and provides the first direct-current output voltage to the bidirectional direct-current/alternating-current module;

the second control system controls the bidirectional direct current/alternating current module to be an inversion module, and the first direct current output voltage is converted into first alternating current output voltage after being subjected to frequency conversion and speed regulation and then is output to a load or is output to a power grid or the load through the grid-connected transformer.

Optionally, when the power supply stores energy, the second control system controls the bidirectional dc/ac module to be an ac/dc rectifier module, and changes a second ac input voltage provided by a load or a power grid into a second dc input voltage;

the first control system controls the second bidirectional H-bridge converter to convert the second direct-current input voltage into a second alternating-current voltage which is high-frequency alternating-current pulse and has amplitude of second input voltage, and the second alternating-current voltage is supplied to the high-frequency transformer;

the first control system controls the second contactor and the third contactor to be closed and the first contactor to be opened, and the amplitude of the second alternating voltage is reduced from the second input voltage to a second amplitude reduction voltage;

the first control system controls the first bidirectional H-bridge converter to be a first fast rectification module, and rectifies the second alternating-current voltage with high-frequency alternating-current pulses and amplitude of the second amplitude-reduced voltage into second direct-current voltage;

when the voltage level of the energy storage battery pack is detected to be a low-voltage interval, the first control system controls the bidirectional direct current/direct current converter to have a conduction function only, and the second direct current voltage is input into the energy storage battery pack;

when the voltage class of the energy storage battery pack is detected to be a high-voltage interval, the first control system controls the bidirectional direct current/direct current converter to be a boost chopper module, and the second direct current voltage is input into the energy storage battery pack after being boosted.

The high-efficiency wide-input-energy bidirectional-flow power supply provided by the invention can meet various application occasions and wide input voltage range through modular design, is suitable for various voltage equipment and portable equipment, and particularly is multifunctional power supply equipment for supporting power supply of various types of electric equipment such as solar energy, energy storage battery packs and the like. The solar energy, wind energy and energy storage battery pack are fully utilized, various input voltages are regulated and stabilized according to needs to meet the power supply requirements of different equipment, variable frequency speed regulation and direct power supply can be realized, and feedback of a power grid and bidirectional flow of energy can also be realized. The invention has the characteristics of ingenious and portable design, wide application, high power supply stability, modular structure and high reliability, meets the requirements of various occasions, has the outstanding characteristics of being capable of adapting to and adjusting power supplies with different specifications and bidirectional flow of energy, and has high market application value.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a diagram of a conventional low voltage range power supply provided by the present invention;

FIG. 2 is a diagram of a conventional high voltage range power supply according to the present invention;

fig. 3 is a schematic structural diagram of a power supply with high efficiency and wide input energy bidirectional flow according to a first embodiment of the present invention;

fig. 4 is a circuit structure diagram of an energy supply and storage circuit of a high-efficiency wide-input energy bidirectional flow power supply according to a second embodiment of the present invention;

fig. 5 is a circuit structure diagram of a power supply source for supplying power with high efficiency and wide input energy flowing in two directions according to a third embodiment of the present invention;

fig. 6 is a circuit structure diagram of an energy storage circuit of a power supply with high efficiency and wide input energy bidirectional flow according to a fourth embodiment of the present invention;

fig. 7 is a circuit structure diagram of an energy supply and storage circuit of a high-efficiency wide-input energy bidirectional flow power supply according to a fifth embodiment of the present invention;

fig. 8 is a bidirectional flow chart of energy supply of the power supply with high-efficiency and wide-input energy bidirectional flow according to the sixth embodiment of the invention;

fig. 9 is a flowchart of energy storage of a power supply with high-efficiency wide-input energy bidirectional flow according to a seventh embodiment of the present invention;

fig. 10 is a flowchart of energy supply of the power supply with high-efficiency wide-input energy bidirectional flow according to the eighth embodiment of the present invention;

fig. 11 is a flowchart of energy storage of the high-efficiency wide-input-energy bidirectional-flow power supply according to the ninth embodiment of the present invention.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a high-efficiency wide-input-energy bidirectional-flow power supply according to an embodiment of the present invention.

The invention provides a power supply with high efficiency and wide input energy bidirectional flow, which comprises: the system comprises an energy storage battery pack 1, a direct current breaker 2, an electromagnetic interference filter 3, a bidirectional direct current/direct current converter 4, a first bidirectional H-bridge converter 5, a high-frequency transformer module 6, a second bidirectional H-bridge converter 7, a bidirectional direct current/alternating current module 8, a sine wave filter 9, an isolation grid-connected transformer 10, a first control system 11 and a second control system 12.

The two ends of the positive pole and the negative pole of the energy storage battery pack 1 are connected with an electromagnetic interference filter 3 through a direct current breaker 2, the electromagnetic interference filter 3 is connected with a bidirectional direct current/direct current converter 4, the bidirectional direct current/direct current converter 4 is connected with a first bidirectional H-bridge converter 5, the first bidirectional H-bridge converter 5 is connected with a second bidirectional H-bridge converter 7 through a high-frequency transformer module 6, the second bidirectional H-bridge converter 7 is connected with a bidirectional direct current/alternating current module 8, the bidirectional direct current/alternating current module 8 is connected with a sine wave filter 9, the sine wave filter 9 is connected with a load or a power grid through an isolation grid-connected transformer 10, a first control system 11 is connected with the direct current breaker 2, the bidirectional direct current/direct current converter 4, the first bidirectional H-bridge converter 5, the second bidirectional H-bridge converter 7 and the high-frequency transformer module 6, the second control system 12 is connected with the bidirectional direct current/alternating current module 8, and the first control system 11 is connected with the second control system 12.

The first control system 11 controls the closing and opening of the dc circuit breaker 2, controls the closing and opening of the contactor in the high-frequency transformer module 6, controls the bidirectional dc/dc converter 4, the first bidirectional H-bridge converter 5 and the second bidirectional H-bridge converter 7 through PWM (Pulse Width Modulation), controls the ac switch through the second control system 12, controls the bidirectional dc/ac module 8 through SPWM (Sinusoidal Pulse Width Modulation), and the first control system 11 and the second control system 12 are connected through a controller lan bus. The first control system 11 samples signals of the bidirectional dc/dc converter 4, the first bidirectional H-bridge converter 5 and the second bidirectional H-bridge converter 7 through the switched capacitor circuit, and the second control system 12 samples signals of the bidirectional dc/ac module 8 through the switched capacitor circuit, so as to control the bidirectional dc/dc converter 4, the first bidirectional H-bridge converter 5, the second bidirectional H-bridge converter 7 and the bidirectional dc/ac module 8 according to the sampling signals.

Referring to fig. 4 to 7, fig. 4 is a circuit structure diagram of an energy supply and storage circuit of a high-efficiency wide-input energy bidirectional flow provided by a second embodiment of the present invention, fig. 5 is a circuit structure diagram of an energy supply and storage circuit of a high-efficiency wide-input energy bidirectional flow provided by a third embodiment of the present invention, fig. 6 is a circuit structure diagram of an energy storage circuit of a high-efficiency wide-input energy bidirectional flow provided by a fourth embodiment of the present invention, and fig. 7 is a circuit structure diagram of an energy supply and storage circuit of a high-efficiency wide-input energy bidirectional flow provided by a fifth embodiment of the present invention.

Further, a first capacitor C1 is connected in parallel between the emi filter 3 and the bi-directional dc/dc converter 4. A first inductor L1 and a second inductor L2 are connected in series between the upper output terminal of the bidirectional dc/dc converter 4 and the upper input terminal of the first bidirectional H-bridge converter 5, a second capacitor C2 is connected in parallel between the bidirectional dc/dc converter 4 and the first bidirectional H-bridge converter 5, and one end of the second capacitor C2 is connected between the first inductor L1 and the second inductor L2. A third inductor L3 is connected in series between the upper output terminal of the second bidirectional H-bridge converter 7 and the bidirectional dc/ac module 8, a third capacitor C3 is connected in parallel between the upper output terminal of the second bidirectional H-bridge converter 7 and the bidirectional dc/ac module 8, and one end of the third capacitor C3 is connected between the third inductor L3 and the bidirectional dc/ac module 8.

Further, the bidirectional dc/dc converter 4 includes a first switching tube VT1 and a second switching tube VT2, a collector of the first switching tube VT1 is connected to a positive electrode of the first capacitor C1, an emitter thereof is connected to a collector of the lower switching tube, an emitter of the second switching tube VT2 is connected to a negative electrode of the first capacitor C1, one end of a first inductor L1 is connected between the first switching tube VT1 and the second switching tube VT2, and the other end of the first inductor L1 is connected to the second inductor L2 and the second capacitor C2.

Further, the first bidirectional H-bridge converter 5 includes a third switching tube VT3, a fourth switching tube VT4, a fifth switching tube VT5 and a sixth switching tube VT6, collectors of the third switching tube VT3 and the fifth switching tube VT5 are connected to a second inductor L2, emitters of the third switching tube VT3 and the fifth switching tube VT5 are connected to collectors of a fourth switching tube VT4 and the sixth switching tube VT6, emitters of the fourth switching tube VT4 and the sixth switching tube VT6 are connected to a negative electrode of a second capacitor C2, and a positive electrode of the second capacitor C2 is connected between the first inductor L1 and the second inductor L2.

Further, the high-frequency transformer module 6 includes a first winding N1, a second winding N2, a third winding N3, a first contactor KM1, a second contactor KM2 and a third contactor KM3, the primary side of the high-frequency transformer module 6 has a first winding N1, the secondary side thereof has a second winding N2 and a third winding N3, one end of the second winding N2 is connected to one end of the first contactor KM1 and one end of the second contactor KM2, the other end thereof is connected to one end of the third contactor KM3, one end of the third winding N3 is connected to the other end of the first contactor KM1 and the other end of the third contactor KM3, the other end thereof is connected to the other end of the second contactor KM2, and the other ends of the second winding N2 and the third winding N3 are both connected to the second bidirectional H-bridge converter 7. When the first contactor KM1 is closed and the second contactor KM2 and the third contactor KM3 are both open, the second winding N2 and the third winding N3 are connected in series, and when the first contactor KM1 is open and the second contactor KM2 and the third contactor KM3 are both closed, the second winding N2 and the third winding N3 are connected in parallel.

Further, the second bidirectional H-bridge converter 7 includes a seventh switch transistor VT7, an eighth switch transistor VT8, a ninth switch transistor VT9, and a tenth switch transistor VT10, collectors of the seventh switch transistor VT7 and the ninth switch transistor VT9 are connected to the third inductor L3, emitters thereof are connected to collectors of the eighth switch transistor VT8 and the tenth switch transistor VT10, emitters of the eighth switch transistor VT8 and the tenth switch transistor VT10 are connected to a negative electrode of the third capacitor C3, and a positive electrode of the third capacitor C3 is connected to the third inductor L3.

Further, one end of the first winding N1 is connected between the third switching tube VT3 and the fourth switching tube VT4, the other end thereof is connected between the fifth switching tube VT5 and the sixth switching tube VT6, the other end of the second winding N2 is further connected between the seventh switching tube VT7 and the eighth switching tube VT8, and the other end of the third winding N3 is further connected between the ninth switching tube VT9 and the tenth switching tube VT 10.

Further, the bidirectional dc/ac module 8 includes an eleventh switching tube VT11, a twelfth switching tube VT12, a thirteenth switching tube VT13, a fourteenth switching tube VT14, a fifteenth switching tube VT15 and a sixteenth switching tube VT16, collectors of the eleventh switching tube VT11, the thirteenth switching tube VT13 and the fifteenth switching tube VT15 are all connected to anodes of the third inductor L3 and the third capacitor C3, emitters of the eleventh switching tube VT11, the thirteenth switching tube VT13 and the fifteenth switching tube VT15 are respectively connected to collectors of the fourteenth switching tube VT14, the sixteenth switching tube VT16 and the twelfth switching tube VT12, and emitters of the fourteenth switching tube VT14, the sixteenth switching tube VT16 and the twelfth switching tube VT12 are all connected to a cathode of the third capacitor C3.

Further, the sine wave filter 9 includes a fourth inductor L4, a fifth inductor L5, a sixth inductor L6, a fourth capacitor C4, a fifth capacitor C5 and a sixth capacitor C6, one end of the fourth inductor L4, one end of the fifth switching tube VT5 and one end of the sixth switching tube VT6 are respectively connected between the eleventh switching tube VT11 and the fourteenth switching tube VT5, between the thirteenth switching tube VT13 and the sixteenth switching tube VT16 and between the fifteenth switching tube VT15 and the twelfth switching tube VT12, the other end of the fourth inductor L4, the other end of the fifth inductor L5 and the other end of the sixth inductor L6 are respectively connected with one end of the fourth capacitor C4, one end of the fifth capacitor C5 and one end of the sixth capacitor C6, the other end of the fourth capacitor C4, the other end of the fifth capacitor C5 and the other end of the sixth capacitor C6, and the other end of the fourth capacitor L4 is connected together, The other end of the fifth inductor L5 and the other end of the sixth inductor L6 are further connected to the respective input ends of the isolation grid-connected transformer 10 and the load through the second ac switch 14, respectively, and the respective output ends of the isolation grid-connected transformer 10 are connected to the load or the grid through the first ac switch 13.

Referring to fig. 8 to 11, fig. 8 is a bidirectional flow chart of energy supply of a high-efficiency wide-input-energy bidirectional-flow power supply provided in a sixth embodiment of the present invention, fig. 9 is a flow chart of energy storage of a high-efficiency wide-input-energy bidirectional-flow power supply provided in a seventh embodiment of the present invention, fig. 10 is a flow chart of energy supply of a high-efficiency wide-input-energy bidirectional-flow power supply provided in an eighth embodiment of the present invention, and fig. 11 is a flow chart of energy storage of a high-efficiency wide-input-energy bidirectional-flow power supply provided in a ninth embodiment of the present invention.

Further, when the power supply supplies energy to a load or a power grid, the first control system 11 controls the bidirectional dc/dc converter 4, the first bidirectional H-bridge converter 5, the high-frequency transformer module 6, and the second bidirectional H-bridge converter 7 to enable the energy storage battery pack 1 to output a first dc voltage to the bidirectional dc/ac module 8, and the second control system 12 controls the bidirectional dc/ac module 8 to convert the first dc voltage into a first ac voltage.

When the power supply stores energy, the second control system 12 controls the bidirectional dc/ac module 8 to convert a second ac voltage provided by a load or a grid into a second dc voltage, and the first control system 11 controls the bidirectional dc/dc converter 4 and the second bidirectional H-bridge converter 7 to output the second dc voltage to the energy storage battery pack 1.

Further, when the voltage level of the energy storage battery pack 1 is in the first voltage interval and the power supply supplies energy to the load or the power grid, the first control system 11 controls the bidirectional dc/dc converter 4 to have only the conduction function, and outputs the first dc voltage.

When the voltage level of the energy storage battery pack 1 is in the second voltage interval and the power supply provides energy for a load or a power grid, the first control system 11 controls the bidirectional direct current/direct current converter 4 to be a buck chopper module, so that the first voltage interval of the energy storage battery pack 1 is stabilized at a first stable direct current voltage, and the value range of the first direct current voltage comprises the first stable direct current voltage.

The first bidirectional H-bridge converter 5 converts the first direct voltage or the first stabilized direct voltage into a first alternating voltage of high-frequency alternating pulses and supplies it to the high-frequency transformer module 6.

When the amplitude of the first ac voltage is the first low input voltage, the first control system 11 controls the first contactor KM1 to be closed, and the second contactor KM2 and the third contactor KM3 to be opened, so as to boost the amplitude of the first ac voltage from the first low input voltage to the first boosted voltage.

When the amplitude of the first ac voltage is the first high input voltage, the first control system 11 controls the second contactor KM2 and the third contactor KM3 to be closed and the first contactor KM1 to be opened, and boosts the amplitude of the first ac voltage from the first high input voltage to a first boost voltage.

The first control system 11 controls the second bidirectional H-bridge converter 7 to be a second fast rectification module, rectifies the first ac voltage of the high-frequency ac pulse and having the amplitude of the first boosted voltage into a first dc output voltage, and supplies the first dc output voltage to the bidirectional dc/ac module 8.

The second control system 12 controls the bidirectional dc/ac module 8 to be an inverter module, and converts the first dc output voltage into a first ac output voltage after frequency conversion and speed regulation, and outputs the first ac output voltage to a load, or outputs the first ac output voltage to a power grid or a load through the isolation grid-connected transformer 10.

Further, when the power supply stores energy, the second control system 12 controls the bidirectional dc/ac module 8 to be an ac/dc rectifier module, and changes the second ac input voltage provided by the load or the grid into the second dc input voltage.

The first control system 11 controls the second bidirectional H-bridge converter 7 to convert the second dc input voltage into a second ac voltage having the amplitude of the second input voltage and high frequency ac pulses, and provides the second ac voltage to the high frequency transformer module 6.

The first control system 11 controls the second contactor KM2 and the third contactor KM3 to be closed and the first contactor KM1 to be opened, and steps down the amplitude of the second ac voltage from the second input voltage to a second stepped-down voltage.

The first control system 11 controls the first bidirectional H-bridge converter 5 as a first fast rectification module, and rectifies a second ac voltage of the high-frequency ac pulse and having an amplitude of a second reduced voltage into a second dc voltage.

When the voltage level of the energy storage battery pack 1 is detected to be in a low voltage interval, the first control system 11 controls the bidirectional direct current/direct current converter 4 to have only a conduction function, and a second direct current voltage is input into the energy storage battery pack 1.

When the voltage level of the energy storage battery pack 1 is detected to be a high-voltage interval, the first control system 11 controls the bidirectional direct current/direct current converter 4 to be a boost chopper module, and second direct current voltage is input into the energy storage battery pack 1 after being boosted.

For some defects of the traditional power supply, the invention provides an effective solution and widens the functions of the traditional power supply. The invention provides the wide-input bidirectional power supply control method integrating power electronic technology and intelligent control, which has the advantages of ingenious design, effective control, high intelligent degree, safety, energy conservation, environmental protection and the like, and can adapt to a wide-input power supply and realize bidirectional flow of energy.

The power supply has the remarkable characteristics that the power supply can realize wide input and bidirectional flow of energy, can realize the full utilization of the energy storage battery packs 1 with different specifications through a control algorithm, has the advantages of rapidness, safety, energy conservation, environmental protection and the like, and has the structure shown in figure 3. Namely, the various specification energy storage battery pack 1 ← → direct current breaker 2 ← → electromagnetic interference filter 3 ← → bidirectional direct current/direct current converter 4 ← → first bidirectional H-bridge converter 5 ← → high frequency transformer module 6 ← → second bidirectional H-bridge converter 7 ← → bidirectional direct current/alternating current module 8 ← → sine wave filter 9 ← → load or power grid. The principle of the structure is as follows:

as shown in fig. 3, the power supply with high efficiency and wide input energy bidirectional flow is composed of 12 parts, an energy storage battery pack 1 with various specifications, a dc circuit breaker 2, an electromagnetic interference filter 3, a bidirectional dc/dc converter 4, a first bidirectional H-bridge converter 5, a high-frequency transformer module 6, a second bidirectional H-bridge converter 7, a bidirectional dc/ac module 8, a sine wave filter 9, an isolation grid-connected transformer 10, a first control system 11 and a second control system 12, etc., and the system can realize wide input power supply and bidirectional flow of energy.

Fig. 4 is a topological circuit diagram of a power supply with high efficiency and wide input energy flowing in two directions, and the functions of each part in the topological circuit are as follows:

(1) the main functions of the bidirectional dc/dc converter 4 are: and conducting. When energy is supplied, the voltage is used as buck chopper, when energy is stored, the voltage is used as boost chopper, the voltage of the direct current 100-1200V of the energy storage battery pack 1 is respectively stabilized at the direct current 100-150V and the direct current 200-300V, and the energy storage battery pack 1 is charged.

(2) The first bidirectional H-bridge converter 5 and the second bidirectional H-bridge converter 7 are respectively used as a first H-bridge inverter and a second fast rectification module when mainly providing energy, and are respectively used as a first fast rectification module and a second H-bridge inverter when storing energy, and are coordinated and controlled with the high-frequency transformer module 6 to output a proper and stable direct-current voltage value.

(3) The primary function of the high-frequency transformer module 6 is to isolate and step up or down the input ac pulse voltage. The primary side of the high-frequency transformer module 6 is provided with one group of windings, the secondary side of the high-frequency transformer module is provided with two groups of windings, and the transformation ratio of the windings N1: N2 and N1: N3 is 1: 3. When the first contactor KM1 is closed and the second contactor KM2 and the third contactor KM3 are opened, the two windings N2 and N3 on the secondary side are connected in series, and the transformation ratio of the primary side winding to the secondary side winding is 1: 6. The second contactor KM2 and the third contactor KM3 are closed, and when the first contactor KM1 is opened, two windings on the secondary side are connected in parallel, and the transformation ratio of the primary winding to the secondary winding is 1: 3.

(4) The bidirectional dc/ac module 8 mainly functions as an inverter module and a rectifier module.

As shown in fig. 4, the first control system 11 controls the on/off of the dc circuit breaker 2, controls the bidirectional dc/dc converter 4, the first bidirectional H-bridge converter 5 and the second bidirectional H-bridge converter 7, controls the on/off of the first contactor KM1, the second contactor KM2 and the third contactor KM3, and detects various states of the power supply. The second control system 12 controls the bidirectional dc/ac module 8, controls the on/off of the first ac switch 13 and the second ac switch 14, and detects various states of the power supply. The two control systems communicate with each other via a CAN bus, exchange data and coordinate control.

As shown in fig. 5, when the power supply supplies energy to the load or the power grid, the first control system 11 detects the voltage level of the energy storage battery 1, controls the bidirectional dc/dc converter 4 and the first bidirectional H-bridge converter 5, outputs a stable dc voltage of 600V to the bidirectional dc/ac module 8, and is capable of adapting to an input power supply with a large fluctuation range and adapting to the energy storage battery 1 in the range of dc 100 and 1200V. The second control system 12 controls the first ac switch 13 and the second ac switch 14, controls the bidirectional dc/ac module 8 to perform inversion operation, and outputs a voltage with variable frequency and adjustable speed, or outputs three-phase ac 400V/50Hz ac power to the load. As shown in fig. 6, when the power supply stores energy, the second control system 12 controls the first ac switch 13 and the second ac switch 14, controls the bidirectional dc/ac module 8 to be controllable rectification, and outputs a stable dc voltage of 600V-750V, the first control system 11 detects the voltage level of the energy storage battery pack 1, controls the second bidirectional H-bridge converter 7, and exchanges data with the second control system 12 to operate in coordination, so as to quickly charge the energy storage battery pack 1, the power supply does not need an additional energy consumption resistance unit, the control performance, safety performance, and reliability of the power supply are improved, the power factor is improved, and the energy storage battery packs 1 of all specifications are charged.

As shown in fig. 8, when the power supply supplies energy to the load or the power grid:

(1) when the voltage level of the energy storage battery pack 1 is within the range of DC 100-150V and DC 200-300V, the bidirectional DC/DC converter 4 only serves as a conduction function to output DC voltages of DC 100-150V and DC 200-300V. When the voltage level of the energy storage battery pack 1 is at 300V plus 1200V DC and 150V plus 200V DC, the bidirectional DC/DC converter 4 is controlled to be a step-down chopper module, and the voltage of the energy storage battery pack 1 at 300V DC and 1200V DC is stabilized at 300V DC and the voltage of the energy storage battery pack at 150V DC by adopting a voltage closed-loop PID constant voltage current-limiting control algorithm.

(2) The first bidirectional H-bridge converter 5 converts the input DC 100-150V and DC 200-300V voltages into AC pulse voltages with high frequencies of DC 100-150V and DC 200-300V, and provides the AC pulse voltages to the high-frequency transformer module 6.

(3) When the input voltage is DC 100-150V, the first contactor KM1 is closed, and the second contactor KM2 and the third contactor KM3 are opened, the high-frequency transformer module 6 boosts the high-frequency AC pulse voltage with the amplitude of DC 100-150V to the high-frequency AC pulse voltage with the amplitude of DC 600-900V. When the input voltage is 200-300V DC, the second contactor KM2 and the third contactor KM3 are closed, and KM1 is opened, the high-frequency transformer module 6 boosts the high-frequency AC pulse voltage with the amplitude of 200-300V DC to the high-frequency AC pulse voltage with the amplitude of 600-900V DC.

(4) The second bidirectional H-bridge converter 7 is now used only as a second fast rectification module to rectify the high-frequency pulse voltage output by the high-frequency transformer module 6 into a dc voltage. The first bidirectional H-bridge converter 5 adopts a phase-shift pulse control algorithm, operates in coordination with the high-frequency transformer module 6, the first contactor KM1, the second contactor KM2, the third contactor KM3 and the second fast rectification module, and then adopts a voltage closed-loop PID constant-voltage current-limiting control algorithm to output stable direct-current voltage 600V to be provided for the bidirectional direct-current/alternating-current module 8.

(5) The bidirectional direct current/alternating current module 8 is controlled to be an inversion module, and voltage with variable frequency and speed regulation is output to be provided for a load, or sinusoidal alternating current voltage with 400V/50Hz is output to be connected to the grid through an isolation grid-connected transformer 10 or directly provided for the load.

As shown in fig. 9, when the power supply stores energy:

(1) the second control system 12 controls the bidirectional dc/ac module 8 to be an ac/dc rectification module, and outputs dc voltage of 600-750V according to the voltage class of the energy storage battery pack 1.

(2) And the second bidirectional H-bridge converter 7 module converts the input stable DC 600-DC 750V voltage into high-frequency AC pulse voltage with the amplitude of DC 600-DC 750V.

(3) At the moment, the second contactor KM2 and the third contactor KM3 are controlled to be closed, and the KM1 is controlled to be opened, so that the high-frequency transformer module 6 reduces the high-frequency alternating-current pulse voltage with the amplitude of 600-750V direct current to the high-frequency alternating-current pulse voltage with the amplitude of 200-250V direct current.

(4) The first bidirectional H-bridge converter 5 is only used as a first fast rectifying module to rectify the high-frequency pulse output by the high-frequency transformer module 6 into a stable dc voltage of 200 and 250V.

(5) When the voltage of the energy storage battery pack 1 is detected to be 100-200V direct current, the bidirectional direct current/direct current converter 4 only has a conducting function, and the second bidirectional H-bridge converter 7 adopts a phase-shift pulse control algorithm and an intermittent variable current and voltage limiting charging control algorithm of a current closed loop PID (proportion integration differentiation), and operates in coordination with the high-frequency transformer module 6 and the first quick rectifying module to charge the energy storage battery pack 1. When the voltage of the energy storage battery pack 1 is direct current 200-direct current 1200V, the second bidirectional H-bridge converter 7 adopts a phase-shift pulse control algorithm in combination with a voltage closed-loop PID constant voltage current-limiting control algorithm to output stable direct current voltage 200 plus 250V to the bidirectional direct current/direct current converter 4, at the moment, the bidirectional direct current/direct current converter 4 is a boost chopper module, and the energy storage battery pack 1 is charged by adopting an intermittent variable current voltage-limiting charging control algorithm of a current closed-loop PID.

The alternating current power supply with the voltage levels of 400V/50Hz, 660V/50Hz and 1140V/50Hz can be output only by changing the wiring of the power frequency transformer.

The first control system 11 and the second control system 12 of the power supply with high-efficiency wide-input energy bidirectional flow start high-efficiency power supply operation according to instructions according to the detected voltage level of the energy storage battery pack 1, the working state of each module, the power grid and the power supply load state requirements and the like. The two control systems reasonably control the power supply and the energy storage of the power supply through data exchange, can effectively realize different application working conditions, adapt to the voltage with wide input range, particularly quickly store regenerative energy, energy of other power supplies or energy of a power grid in the energy storage process, can realize quick energy storage, cannot damage the power supply system, and also improve the service life of the power supply with wide input energy bidirectional flow.

The invention has the advantages that: the invention has simple circuit structure, low manufacturing cost, easy control and high performance-price ratio, realizes the high-efficiency utilization of wide input power input and electric energy by applying the power electronic technology and the full-digital intelligent technology, more effectively realizes various special working conditions of power supply application by bidirectional flow of energy, realizes the effective utilization of regenerated energy, prolongs the service life and the service efficiency of the power supply, can adapt to different loads and different application environments, and avoids the instability of a power supply grid. The energy storage battery pack has an energy storage function and an instant heavy current discharge function, so that energy waste is avoided, energy conservation and environmental protection are realized, and the control performance, the application performance, the general performance and the use safety performance of the whole product are improved.

In the above embodiments, the description of each embodiment has its own emphasis, and for parts not described in detail in a certain embodiment, reference may be made to the description of other embodiments. In the above description, for the power supply with high efficiency and wide input energy flowing in two directions provided by the present invention, for a person skilled in the art, according to the idea of the embodiment of the present invention, there may be changes in the specific implementation and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.