阅读说明：本技术 一种单稳态双母线合分闸驱动系统 (Monostable double-bus switching-on/off driving system ) 是由 陈彦武 于 2020-06-05 设计创作，主要内容包括：本发明公开了一种单稳态双母线合分闸驱动系统,包括充电模块、储能单元、驱动回路以及励磁线圈,储能单元包括分闸储能电容和合闸储能电容,充电模块的输出端与合闸储能电容连接以及分闸储能电容连接。本系统使用单充电模块,将单母线设计为双母线,设置合闸储能电容HC和分闸储能电容FC,合分闸充电母线共源的同时其放电回路隔离,合分闸拥有独立的电源系统,在保持系统的充电电源功率以及输出电压不变的情况下,通过反向励磁电压提高了系统的合闸、分闸电压,加速分闸动作,有效提升了系统分闸的性能指标,并且,合、分闸电路充电回路共源的同时,其放电回路互不影响,合、分闸参数不受频繁操作等外界因素影响。(The invention discloses a monostable double-bus switching-on/switching-off driving system which comprises a charging module, an energy storage unit, a driving loop and an excitation coil, wherein the energy storage unit comprises a switching-off energy storage capacitor and a switching-on energy storage capacitor, and the output end of the charging module is connected with the switching-on energy storage capacitor and the switching-off energy storage capacitor. The system uses a single charging module, the single bus is designed into a double bus, a closing energy storage capacitor HC and an opening energy storage capacitor FC are arranged, the closing and opening charging buses share common sources, and meanwhile, the discharging loop is isolated, the closing and opening have independent power supply systems, under the condition that the charging power supply power and the output voltage of the system are not changed, the closing and opening voltage of the system is improved through reverse excitation voltage, the opening action is accelerated, the performance index of the system opening is effectively improved, in addition, the closing and opening circuits charge the common sources of the circuit, the discharging loops are not influenced by each other, and the closing and opening parameters are not influenced by external factors such as frequent operation.)

1. The utility model provides a monostable double bus closes separating brake actuating system, includes charging module, energy storage unit, drive circuit and excitation coil, its characterized in that, and the energy storage unit includes separating brake energy storage capacitor and combined floodgate energy storage capacitor, the output of charging module through combined floodgate control bus with combined floodgate energy storage capacitor connects, the output of charging module through separating brake control bus with separating brake energy storage capacitor connects, separating brake energy storage capacitor is arranged in for separating brake action the excitation coil energy supply, combined floodgate energy storage capacitor is arranged in for combining floodgate action the excitation coil energy supply.

2. The monostable double-bus switching-on/switching-off driving system according to claim 1, further comprising a first diode and a second diode, wherein the charging module is respectively connected with anodes of the first diode and the second diode, a cathode of the first diode is connected with the switching-on energy storage capacitor, and a cathode of the second diode is connected with the switching-off energy storage capacitor.

3. The monostable double-bus switching-on/switching-off drive system according to claim 2, further comprising a switching-on drive unit and a switching-off drive unit.

4. The monostable double-bus on-off driving system according to claim 3, wherein the driving loop includes a first transistor, a second transistor, a third transistor, a fourth transistor, a first zener diode, a second zener diode, a third diode and a fourth diode.

5. The monostable double-bus switching-on/switching-off driving system according to claim 4, wherein a negative electrode of the first diode is connected to a positive electrode of the switching-on energy storage capacitor and a collector of the third triode, an emitter of the third triode and a collector of the fourth triode are connected to a positive electrode of the second zener diode and a first terminal of the excitation coil, respectively, a base of the third triode and a negative electrode of the second zener diode are connected to the switching-on driving unit, an emitter of the fourth triode is grounded together with a positive electrode of the fourth diode and a negative electrode of the switching-on energy storage capacitor, and a base of the fourth triode and a negative electrode of the fourth diode are connected to the switching-off driving unit; the negative pole of second diode respectively with the positive pole of separating brake energy storage capacitor and the collecting electrode of first triode is connected, the projecting pole of first triode and the collecting electrode of second triode respectively with the positive pole of first zener diode and the second wiring end of excitation coil are connected, the base of first triode and the negative pole of first zener diode with separating brake drive unit connects, the projecting pole of second triode and the positive pole of third diode and the common ground connection of the negative pole of separating brake energy storage capacitor, the base of second triode and the negative pole of third diode with closing brake drive unit connects.

6. A monostable double bus closing and opening drive system according to any of claims 4 to 5, in which the first transistor, the second transistor, the third transistor and the fourth transistor are NPN transistors with freewheeling diodes.

Technical Field

The invention relates to a monostable closing and opening brake driving system, in particular to a monostable double-bus closing and opening brake driving system.

Background

The bistable mechanism is provided with an independent closing and opening control loop, under the same condition, the peak value of closing current of the bistable permanent magnet mechanism is smaller, and for a control circuit part, the smaller the current is, the simpler and more reliable the control is, the smaller the probability of damage of the control circuit is, but the rigid opening speed of the bistable permanent magnet mechanism is lower than the average speed of the full stroke of the switch, and manual opening cannot be realized, even if the manual mechanism is adopted to enable the bistable permanent magnet mechanism to be separated from the switch to be in the closed stable position, the bistable permanent magnet mechanism cannot move to the opening position at the required opening speed, and the opening process of the bistable permanent magnet mechanism is related to the difference of manpower; compared with a bistable permanent magnet mechanism, the monostable permanent magnet mechanism has a simple control structure, and the brake-separating action is completed through a brake-separating spring in the mechanism, so that the rigid brake-separating speed in the brake-separating process is basically consistent with the average brake-separating speed of the full stroke of the switch, the mechanism is superior to the bistable permanent magnet mechanism, the mechanism can be well matched with the brake-separating counterforce characteristic curve of a circuit breaker, manual emergency brake-separating can be performed, and after the mechanism is separated from a brake-closing position through manpower, the brake-separating spring provides enough brake-separating speed, so that the mechanism can be reliably separated.

As shown in fig. 1, when a system receives a closing command signal, T3 and T2 are turned on, current passes through a loop formed by a bus, the energy storage capacitor C, the T3, the excitation coil and the T2 to generate closing electromagnetic force, and a mechanism completes a closing action; when the system receives the opening command signal, T1 and T4 are conducted, the current forms a loop by the bus stored energy C through T1, the magnet exciting coil and T4, the opening electromagnetic force is generated, the mechanism completes the opening action,

the existing monostable closing and opening brake driving main circuit adopts a closing and opening brake common energy storage capacitor and is influenced by a plurality of factors such as system integration, an energy storage power supply of a control system generally cannot adopt a charging module with small volume and small power, the time of 5 to 15 seconds is generally required for fully storing the energy storage capacitor, if the system meets the conditions of emergency closing and opening brake, fault reclosing and the like, a mechanism needs to be frequently started and operated and is limited by the optimal charging time, the voltage of the energy storage capacitor in each operation is unequal, the consistency of closing and opening brake action time of the mechanism is influenced, and the closing and opening data dispersibility is large. The switching-on time of the current fastest permanent magnet switch is more than 25ms (millisecond), and the switching-off time is more than 15 ms; with the development of the intelligent power grid power distribution technology, in order to quickly realize the technical requirements of system fault identification and system fault isolation, the switching-off time is required to be less than 10ms, and the existing driving mode is difficult to reliably realize quick switching-off control.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a monostable switching-on and switching-off driving system with stable switching-on and switching-off parameters and a double-bus design.

The energy storage unit comprises a switching-off energy storage capacitor and a switching-on energy storage capacitor, the output end of the charging module is connected with the switching-on energy storage capacitor through a switching-on control bus, the output end of the charging module is connected with the switching-off energy storage capacitor through the switching-off control bus, the switching-off energy storage capacitor is used for supplying energy to the excitation coil in switching-off action, and the switching-on energy storage capacitor is used for supplying energy to the excitation coil in switching-on action.

As a preferable mode, the energy-saving switch further comprises a first diode and a second diode, the charging module is respectively connected with the anodes of the first diode and the second diode, the cathode of the first diode is connected with the switch-on energy-storage capacitor, and the cathode of the second diode is connected with the switch-off energy-storage capacitor.

As a preferable mode, the device further comprises a closing driving unit and an opening driving unit.

As a preferable mode, the driving circuit includes a first triode, a second triode, a third triode, a fourth triode, a first zener diode, a second zener diode, a third diode, and a fourth diode.

As a preferred mode, the negative electrode of the first diode is connected to the positive electrode of the switching-on energy storage capacitor and the collector of the third triode, the emitter of the third triode and the collector of the fourth triode are connected to the positive electrode of the second voltage regulator diode and the first terminal of the excitation coil, respectively, the base of the third triode and the negative electrode of the second voltage regulator diode are connected to the switching-on driving unit, the emitter of the fourth triode, the positive electrode of the fourth diode and the negative electrode of the switching-on energy storage capacitor are grounded together, and the base of the fourth triode and the negative electrode of the fourth diode are connected to the switching-off driving unit; the negative pole of second diode respectively with the positive pole of separating brake energy storage capacitor and the collecting electrode of first triode is connected, the projecting pole of first triode and the collecting electrode of second triode respectively with the positive pole of first zener diode and the second wiring end of excitation coil are connected, the base of first triode and the negative pole of first zener diode with separating brake drive unit connects, the projecting pole of second triode and the positive pole of third diode and the common ground connection of the negative pole of separating brake energy storage capacitor, the base of second triode and the negative pole of third diode with closing brake drive unit connects.

Preferably, the first transistor, the second transistor, the third transistor, and the fourth transistor are NPN transistors with freewheeling diodes.

The monostable double-bus switching-on/switching-off driving system provided by the invention uses a single charging module, a single bus is designed into a double bus, a switching-on energy storage capacitor HC and a switching-off energy storage capacitor FC are arranged, a discharging loop of the switching-on/switching-off charging bus is isolated while a common source is switched on/off, the switching-on/switching-off has an independent power supply system, the switching-on/switching-off voltage of the system is improved through reverse excitation voltage under the condition that the charging power supply power and the output voltage of the system are not changed, the switching-on/switching-off action is accelerated, the performance index of the system switching-off is effectively improved, and the discharging loops of the switching-on/switching-off charging loop are not influenced by each other while the common source is switched on/off, and switching-.

Drawings

FIG. 1 is a diagram of a monostable opening/closing driving circuit;

FIG. 2 is a circuit diagram of an embodiment of the present invention;

FIG. 3 is a voltage waveform diagram of an operating state according to an embodiment of the present invention.

Number and name in the figure: 1. the charging module 2, the closing drive unit 3, the opening drive unit 4, the excitation coil 41, the first terminal 42, the second terminal 5, the opening control bus 6, the closing control bus HC, the closing energy storage capacitor FC, the opening energy storage capacitor D5, the first diode D6, the second diode D2, the third diode D4, the fourth diode D1, the first zener diode D3, the second zener diode T1, the first triode T2, the second triode T3, the third triode T4, the fourth triode T4

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings.

A monostable double-bus switching-on/off driving system refers to figures 1 to 3 and comprises a charging module 1, an energy storage capacitor, a driving loop and an excitation coil 4, wherein the energy storage capacitor comprises a switching-off energy storage capacitor FC and a switching-on energy storage capacitor HC, the output end of the charging module 1 is connected with the switching-on energy storage capacitor HC through a switching-on control bus 6, and meanwhile, the output end of the charging module 1 is connected with the switching-off energy storage capacitor FC through a switching-off control bus 8.

The charging module 1 is respectively connected with the anodes of the first diode D5 and the second diode D6, the cathode of the first diode D5 is connected with a closing energy storage capacitor HC, and the cathode of the second diode D6 is connected with an opening energy storage capacitor FC, so that the closing loop and the opening loop are isolated, and the work is not influenced by each other.

Specifically, the basic principle of the driving circuit is the same as that of the existing driving circuit, the driving circuit includes a first transistor T1, a second transistor T2, a third transistor T3, and a fourth transistor T4, the first voltage stabilizing diode D1, the second voltage stabilizing diode D3, the third diode D2 and the fourth diode D4 have negative electrodes of the first diode D5 connected to the positive electrode of the closing energy storage capacitor HC and the collector electrode of the third triode T3, the emitter electrode of the third triode T3 and the collector electrode of the fourth triode T4 are connected to the positive electrode of the second voltage stabilizing diode D3 and the first terminal 41 of the excitation coil 4, the base electrode of the third triode T3 and the negative electrode of the second voltage stabilizing diode D3 are connected to the driving unit 2, the emitter electrode of the fourth triode T4 is grounded together with the positive electrode of the fourth diode D4 and the negative electrode of the closing energy storage capacitor HC, and the base electrode of the fourth triode T4 and the negative electrode of the fourth diode D4 are connected to the opening driving unit 3; the cathode of the second diode D6 is connected to the anode of the opening energy-storage capacitor FC and the collector of the first triode T1, the emitter of the first triode T1 and the collector of the second triode T2 are connected to the anode of the first zener diode D1 and the second terminal 42 of the excitation coil 4, the base of the first triode T1 and the cathode of the first zener diode D1 are connected to the opening driving unit 3, the emitter of the second triode T2, the anode of the third diode D2 and the cathode of the opening energy-storage capacitor FC are grounded together, the base of the second triode T2 and the cathode of the third diode D2 are connected to the closing driving unit 2, and the first triode T1, the second triode T2, the third triode T3 and the fourth triode T4 are NPN triodes with freewheeling diodes.

The charging module 1 charges the closing energy storage capacitor HC through the first diode D5, and simultaneously charges the opening energy storage capacitor FC through the second diode D6; during discharging, switching on operation, wherein energy is output for the switching on operation by a switching on energy storage capacitor HC; the opening operation is carried out, and energy is output for the opening operation by an opening energy storage capacitor FC; the first diode D5 and the second diode D6 are arranged to isolate the closing and opening discharging loops from each other and to avoid influence, and the closing and opening parameters are not influenced by frequent operation and other factors.

When the system receives a closing signal of the closing driving unit 2, the third triode T3 and the second triode T2 are conducted, current passes through a loop formed by the closing energy storage capacitor HC of the closing control bus 6, the third triode T3, the magnet exciting coil and the second triode T2, closing electromagnetic force is generated, and the mechanism completes closing action.

When the system receives a brake-off signal of the brake-off driving unit 3, the first triode T1 and the fourth triode T4 are conducted, current passes through a loop formed by the brake-off energy storage capacitor FC of the brake-off control bus 5, the first triode T1, the magnet exciting coil and the fourth triode T4, brake-off electromagnetic force is generated, and the mechanism completes brake-off.

After the system is electrified and precharged, the voltage of the closing energy storage capacitor HC is the same as that of the opening energy storage capacitor FC, UHc (the voltage value of the closing energy storage capacitor) is Ucd (the charging voltage value of the charging module), UFc (the voltage value of the opening energy storage capacitor) is Ucd, when the system receives a closing signal, T3 and T2 in the system are conducted, the current passes through T3 by the closing energy storage capacitor HC, the excitation coil and T2 to form a loop to output energy for operation closing, the opening energy storage capacitor FC is isolated in the reverse direction by a second diode D6, the system is not discharged during closing, and the voltage of the opening energy storage capacitor FC maintains the original charging voltage Ucd.

When a closing signal of a driving system is cut off, because an excitation coil belongs to an inductive load, current cannot suddenly change, a flyback excitation voltage is formed, the flyback excitation voltage is at least 115% higher than a forward voltage, referring to fig. 3, a time period from T1 to T2 is a closing acting interval, a time period from T2 to T3 is a flyback excitation voltage interval generated when closing is cut off, and the high flyback excitation voltage returns to the excitation coil through a freewheeling diode of T1, a separating brake energy storage capacitor FC and a freewheeling diode of T4 to discharge and return, namely, a separating brake bus charging loop. As can be seen from the data in fig. 3, the closing voltage is 380V, the voltage value of the secondary charged opening bus reaches more than 400V, and the opening capability is improved by more than 15%.

Specifically, the flyback excitation voltage is formed by a loop formed by a freewheeling diode of T1, a separating brake energy storage capacitor FC and a freewheeling diode of T4, the separating brake energy storage capacitor FC is charged twice, and the charging current path is as follows: the flyback end of the exciting coil-the fly-wheel diode of the T1-the fly-wheel diode of the separating brake energy storage FC-T4-the forward end of the exciting coil finish discharging the reverse exciting voltage, and the original parasitic reverse exciting voltage is converted into separating brake energy to be stored on the separating brake energy storage capacitor FC. After the secondary energy storage, UFc is Ucd + Ufj (after the closing operation, the reverse excitation voltage generated by the excitation coil)

When the monostable switch is switched on and switched off, enough energy is needed for the excitation energy to overcome the working of a compression switching-on pressure spring and a switching-off energy storage spring to close the switch; during the switching-off operation, the excitation energy only needs to rapidly generate a counter-magnetic force to break the iron core, and the switching-off process is completed by the acceleration of an inherent switching-off spring, so that the system only needs to provide an initial acting force in the switching-off action, the switching-off follow-up is irrelevant to the system output energy, and in the model selection, the switching-off energy storage capacitor FC is smaller than the switching-on energy storage capacitor HC; the capacity of the separating brake energy storage capacitor FC is small, the voltage of the separating brake energy storage capacitor FC is increased by reverse excitation charging and is higher than that of the closing energy storage capacitor HC, the charging voltage is more than 130%, the separating brake energy storage capacitor FC obtains higher voltage, the voltage of a separating brake bus is at least 130% higher than the original voltage, the separating brake capacity is enhanced, and the separating brake speed is effectively improved compared with that of the existing driving circuit.

The monostable switching-on/switching-off driving system with the double-bus design uses a single charging module, the single bus is designed into a double bus, a switching-on energy storage capacitor HC and a switching-off energy storage capacitor FC are arranged, a discharging loop of the switching-on/switching-off charging bus is isolated while a common source is switched on and switched off, the switching-on/switching-off has an independent power supply system, the switching-on and switching-off voltage of the system is improved through reverse excitation voltage under the condition that the charging power supply power and the output voltage of the system are not changed, the switching-on and switching-off actions are accelerated, and meanwhile, the rapid switching-off is realized jointly by utilizing an inherent switching-off spring.

The above is an explanation of a monostable double-bus switching on/off driving system of the present invention for helping understanding of the present invention, but the implementation manner of the present invention is not limited by the above-mentioned embodiments, and any changes, modifications, substitutions, combinations, and simplifications which do not depart from the principle of the present invention should be equivalent replacement manners, and are included in the protection scope of the present invention.