阅读说明：本技术 牵引供电设备 (Traction power supply equipment ) 是由 罗建利 刘斌 罗孝侃 陈兵生 左后林 郭惠艳 吴世辉 于 2020-06-29 设计创作，主要内容包括：本发明提供了一种牵引供电设备,包括：变压组件,变压组件用于对输入的电流进行升压；第一整流桥,连接于变压组件的输出端；第二整流桥,连接于变压组件的输出端；控制器与第一整流桥和第二整流桥相连接。本发明提供的牵引供电设备,在轨道车辆需要高压牵引时,通过控制器控制第一整流桥和第二整流桥以串联的形式输出直流电；在轨道车辆需要低压牵引时,通过控制器控制第一整流桥和第二整流桥以并联的形式输出直流电,使得牵引供电设备输出的直流电压可以根据现场需要进行调节,能够满足不同电压制式的轨道车辆,减少了牵引供电设备的使用数量,大幅度降低了投资和运行成本,使运营和维护更为简单和方便。(The invention provides a traction power supply device, comprising: the voltage transformation assembly is used for boosting the input current; the first rectifier bridge is connected to the output end of the voltage transformation assembly; the second rectifier bridge is connected to the output end of the voltage transformation assembly; the controller is connected with the first rectifier bridge and the second rectifier bridge. According to the traction power supply equipment provided by the invention, when a rail vehicle needs high-voltage traction, the first rectifier bridge and the second rectifier bridge are controlled by the controller to output direct current in a series connection mode; when the rail vehicle needs low-voltage traction, the controller controls the first rectifier bridge and the second rectifier bridge to output direct current in a parallel connection mode, so that the direct current voltage output by the traction power supply equipment can be adjusted according to the field requirement, the rail vehicle with different voltage systems can be met, the use number of the traction power supply equipment is reduced, the investment and the operation cost are greatly reduced, and the operation and the maintenance are simpler and more convenient.)

1. A traction power supply apparatus, comprising:

the transformer assembly (26), the transformer assembly (26) is used for boosting the input current;

the first rectifier bridge (4) is connected to the output end of the voltage transformation component (26);

the second rectifier bridge (6) is connected to the output end of the voltage transformation component (26);

the controller (28) is connected with the first rectifier bridge (4) and the second rectifier bridge (6), and the controller (28) can control the first rectifier bridge (4) and the second rectifier bridge (6) to output direct current in a serial connection or parallel connection mode.

2. The traction power supply apparatus according to claim 1, further comprising:

the transformer room (2), the transformation assembly (26), the first rectifier bridge (4), the second rectifier bridge (6) and the controller (28) are arranged in the transformer room (2).

3. Traction power supply device according to claim 2, characterized in that said transformation assembly (26) comprises:

a transformer (20), the transformer (20) being configured to boost an input current;

the transformer cabinet (18), the transformer (20) sets up in the transformer cabinet (18), the transformer cabinet (18) set up in the transformer room (2), be fixed in on the central floor of transformer room (2).

4. The tractive power supply apparatus of claim 3,

the first rectifier bridge (4) is connected to a secondary side Y-shaped winding of the transformer (20);

the second rectifier bridge (6) is connected to the secondary side D-shaped winding of the transformer (20).

5. The traction power supply apparatus according to claim 3, further comprising:

the circuit breaker (8) is arranged in the transformer cabinet (18), and the circuit breaker (8) is connected with the transformer (20) and used for controlling the connection or disconnection of the transformer (20) and an input circuit;

a lightning arrester (58) connected to the input circuit;

the pre-charging circuit is connected with the input circuit in parallel, and a first resistor (30) and a first control switch (32) are arranged on the pre-charging circuit;

a second control switch (34) provided on the input circuit;

the controller (28) is connected to the first control switch (32) and the second control switch (34), and can control the on and off of the pre-charging loop through the first control switch (32) and control the on and off of the input circuit through the second control switch (34).

6. The traction power supply apparatus according to claim 2, further comprising:

the transformer substation cabinet comprises a rectifier cabinet (10), wherein the first rectifier bridge (4) and the second rectifier bridge (6) are arranged in the rectifier cabinet (10), the rectifier cabinet (10) is arranged in the transformer substation room (2), is fixed on the central floor of the transformer substation room (2), is communicated with the transformer cabinet (18), and is arranged in parallel with the transformer cabinet (18).

7. The traction power supply apparatus according to claim 2, further comprising:

the switch cabinet (12), the controller (28) sets up in the switch cabinet (12), switch cabinet (12) set up in transformer room (2), fix on the central floor of transformer room (2), communicate with rectifier cabinet (10), with rectifier cabinet (10) parallel arrangement.

8. The traction power supply apparatus according to claim 7, further comprising:

a control button (14), wherein the control button (14) is connected to the controller (28), and the control button (14) can control the starting and stopping of the controller (28);

the touch screen (16) is arranged on the switch cabinet (12), the touch screen (16) is connected to the controller (28), and the touch screen (16) is used for controlling the first rectifying bridge (4) and the second rectifying bridge (6) to output direct current in a serial or parallel mode through the controller (28).

9. The traction power supply apparatus according to any one of claims 1 to 8, further comprising:

the twelve-pulse-wave thyristor digital controller (60), the twelve-pulse-wave thyristor digital controller (60) is connected with the controller;

the first rectifier bridge (4) and the second rectifier bridge (6) are three-phase six-pulse fully-controlled rectifier bridges, the twelve-pulse-wave thyristor digital controller (60) is connected to six thyristors of the first rectifier bridge (4) and six thyristors of the second rectifier bridge (6), and the twelve-pulse-wave thyristor digital controller (60) can control the starting and stopping of the six thyristors of the first rectifier bridge (4) and the six thyristors of the second rectifier bridge (6) based on a voltage instruction of the controller.

10. The traction power supply apparatus according to claim 9, further comprising:

one end of the first protection circuit is connected to the anode of the output end of the first rectifier bridge (4), the other end of the first protection circuit is connected to the cathode of the output end of the first rectifier bridge (4), a first diode (36) and a second resistor (38) are arranged on the first protection current, and the second resistor (38) is located between the first diode (36) and the anode of the output end of the first rectifier bridge (4);

one end of the second protection circuit is connected to the anode of the output end of the second rectifier bridge (6), the other end of the second protection circuit is connected to the cathode of the output end of the second rectifier bridge (6), a second diode (40) and a third resistor (42) are arranged on the second protection current, and the third resistor (42) is located between the second diode (40) and the anode of the output end of the second rectifier bridge (6);

the load circuit comprises a first direct current reactor (44), a first filter capacitor (46) and a first aluminum shell resistor (48), one end of the first aluminum shell resistor (48) is connected to the positive pole of the output end of the first rectifier bridge (4), the other end of the first aluminum shell resistor is connected to the negative pole of the output end of the first rectifier bridge (4), and the first direct current reactor (44) is arranged on the positive pole circuit of the output end of the first rectifier bridge (4) and is positioned between the first filter capacitor (46) and the first aluminum shell resistor (48);

the second load circuit comprises a second direct current reactor (50), a second filter capacitor (52) and a second aluminum shell resistor (54), one end of the second aluminum shell resistor (54) is connected to the positive pole of the output end of the second rectifier bridge (6), the other end of the second aluminum shell resistor is connected to the negative pole of the output end of the second rectifier bridge (6), and the second direct current reactor (50) is arranged on the positive pole line of the output end of the second rectifier bridge (6) and is positioned between the second filter capacitor (52) and the second aluminum shell resistor (54);

and the current equalizing reactor (56) is arranged on the positive electrodes of the output ends of the first rectifier bridge (4) and the second rectifier bridge (6).

Technical Field

The invention relates to the technical field of rail transit, in particular to traction power supply equipment.

Background

In recent years, the new rail transit industry in China is developed vigorously, new rail transit is planned and constructed in large and medium cities and tourist sightseeing cities, in order to meet the market demand of urban rail vehicles which are increasingly developed in cities, domestic large-scale motor vehicle manufacturing enterprises continue to construct urban rail vehicle production and test bases in various places, and the traction power supply of vehicles is one of key technologies in the design of urban rail vehicle test bases, so that the traction power supply demand of various urban rail test vehicles in the bases is met.

At present, the voltage systems of domestic urban rail vehicles mainly comprise DC750V and DC1500V, the voltage systems of the urban rail vehicles in different areas are not necessarily the same, and even in the same city, the urban rail vehicles with various voltage systems are possible. The existing traction power supply equipment cannot output different voltages, and traction power supply equipment with different output voltages needs to be arranged, so that the investment and operation cost is high, and the maintenance is inconvenient.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

In view of the above, the present invention provides a traction power supply apparatus, including: the voltage transformation assembly is used for boosting the input current; the first rectifier bridge is connected to the output end of the voltage transformation assembly; the second rectifier bridge is connected to the output end of the voltage transformation assembly; the controller is connected with the first rectifier bridge and the second rectifier bridge and can control the first rectifier bridge and the second rectifier bridge to output direct current in a series connection or parallel connection mode.

According to the traction power supply equipment, in the working process, the input circuit transmits current to the voltage transformation assembly. The transformer boosts the input current to a proper voltage, and the direct current is output after rectification and voltage regulation through the first rectifier bridge and the second rectifier bridge, so that the direct current can be used for traction power supply of the rail vehicle.

According to the traction power supply equipment provided by the invention, when a rail vehicle needs high-voltage traction, the first rectifier bridge and the second rectifier bridge are controlled by the controller to output DC 1000-1800V direct current in a series connection mode; when the rail vehicle needs low-voltage traction, the first rectifier bridge and the second rectifier bridge are controlled by the controller to output DC 500-900V direct current in a parallel connection mode, so that the direct current voltage output by traction power supply equipment can be adjusted, the rail vehicles of different specifications can be met, the use number of the traction power supply equipment can be reduced, the investment and the operation cost are reduced, and the maintenance is more convenient. In addition, the output voltage can be set and adjusted, so that the system can be used for simulating the fluctuation of the power grid voltage so as to test the working conditions of vehicle-mounted equipment on a vehicle under different power grid voltages.

For example, three-phase 380V ac power may be input to the transforming assembly, the transforming assembly boosts the current to a suitable voltage, and then outputs DC1000 to 1800V current in series through the first and second rectifying bridges or DC500 to 900V current in parallel through the first and second rectifying bridges.

In addition, the traction power supply equipment in the above technical solution provided by the present invention may further have the following additional technical features:

in the above technical solution, further, the traction power supply device further includes: the transformer room, the transformation component, the first rectifier bridge, the second rectifier bridge and the controller are arranged in the transformer room.

In the technical scheme, the traction power supply equipment further comprises a transformer room, and the transformer room is provided with installation positions for the transformation assembly, the first rectifier bridge, the second rectifier bridge and the controller, so that the traction power supply equipment is integrally modularized, and on one hand, unified management and maintenance are facilitated; on the other hand, the traction power supply equipment can be used more safely.

In any of the above technical solutions, further, the voltage transformation assembly includes: the transformer is used for boosting the input current; the transformer cabinet is arranged in the transformer cabinet and is arranged in the transformer room and fixed on the central floor of the transformer room.

In this technical scheme, further provide the constitution of vary voltage subassembly, the vary voltage subassembly includes transformer and transformer cabinet, sets up through the transformer cabinet and provides the mounted position for the transformer, the installation of the transformer of being convenient for, the access of the input current of being convenient for and drawing forth of output current, transformer cabinet connects in the transformer room simultaneously and makes the installation and the operation of transformer more firm, reliable.

Particularly, the transformer is a dry-type transformer, and the dry-type transformer has the characteristics of high safety, high reliability, energy conservation and environmental protection, and is particularly suitable for a rail transit system.

In any of the above technical solutions, further, the first rectifier bridge is connected to a secondary side Y-type winding of the transformer; the second rectifier bridge is connected to the secondary side D-type winding of the transformer.

In this technical scheme, further provide the connected mode of first rectifier bridge and second rectifier bridge, can form two way output current, can output high-tension current under the circumstances that first rectifier bridge and second rectifier bridge are established ties, can output low-tension current under the circumstances that first rectifier bridge and second rectifier bridge are parallelly connected for it is adjustable to pull power supply unit output voltage, and application scope is wider. The method can also be used for simulating the voltage fluctuation of the power grid and testing the working conditions of the vehicle-mounted equipment under different power grid voltages.

In any of the above technical solutions, further, the traction power supply apparatus further includes: the circuit breaker is arranged in the transformer cabinet, is connected with the transformer and is used for controlling the connection or disconnection of the transformer and the input circuit; the lightning arrester is connected with the input circuit; the pre-charging circuit is connected in parallel with the input circuit and is provided with a first resistor and a first control switch; the second control switch is arranged on the input circuit; the controller is connected to the first control switch and the second control switch, can control the opening and the disconnection of the pre-charging loop through the first control switch, and can control the opening and the disconnection of the input circuit through the second control switch.

In the technical scheme, the traction power supply equipment further comprises a circuit breaker, and the connection or disconnection between the transformer and the input circuit is realized through the arrangement of the circuit breaker, so that the traction power supply equipment is applicable and safer.

Specifically, the circuit breaker may be a frame-type circuit breaker, which can be used to connect, carry and disconnect current under normal circuit conditions, and also can be used to connect, carry and disconnect current for a certain time under specified abnormal circuit conditions, and can provide various protections such as line protection and overload, undervoltage, short circuit and the like of power supply equipment.

In the technical scheme, the lightning arrester is arranged, so that the effects of surge and lightning protection can be achieved, and the traction power supply equipment is safer to use.

In the technical scheme, through the arrangement of the pre-charging loop, when the traction equipment is in a starting stage, when input current inputs current to the transformer, the controller can control the first control switch to be closed, so that the pre-charging loop is communicated, the second control switch is controlled to be disconnected from the control input circuit, so that the input current enters the transformer through the pre-charging loop, a capacitor device in the rectifier cabinet is charged in advance, the capacitor device is prevented from being short-circuited when being switched on, and the traction power supply equipment is safer to use.

In any of the above technical solutions, further, the traction power supply apparatus further includes: the rectifier cabinet, first rectifier bridge and second rectifier bridge set up in the rectifier cabinet, and the rectifier cabinet sets up in the transformer room, is fixed in on the transformer room central floor, communicates in the transformer cabinet, sets up side by side with the transformer cabinet.

In the technical scheme, the traction power supply equipment further comprises a rectifier cabinet, and the rectifier cabinet provides installation positions for the first rectifier bridge, the second rectifier bridge and accessories, so that the first rectifier bridge and the second rectifier bridge are more reliable in fixation and operation.

In any of the above technical solutions, further, the traction power supply apparatus further includes: the switch cabinet, the controller sets up in the switch cabinet, and the switch cabinet sets up in the transformer room, fixes on the central floor of transformer room, communicates in the rectifier cabinet, sets up side by side with the rectifier cabinet.

In the technical scheme, the traction power supply equipment further comprises a switch cabinet, and the switch cabinet is arranged to provide a mounting position for the controller, so that the controller is more reliable to mount and operate. The first rectifier bridge and the second rectifier bridge are connected in series or in parallel through different combinations of contactors in the control switch cabinet, so that the switching of working modes is completed.

Specifically, under the condition that the traction power supply equipment comprises a transformer cabinet, a rectifier cabinet and a switch cabinet, the transformer cabinet, the rectifier cabinet and the switch cabinet are sequentially arranged in a transformer room, the transformer cabinet and the rectifier cabinet can be fixed through connecting pieces, the rectifier cabinet and the switch cabinet can be fixed through connecting pieces, and meanwhile the transformer cabinet, the rectifier cabinet and the switch cabinet can be connected with a cross beam on the floor of the transformer room through bolts. On one hand, the voltage transformation assembly, the first rectifier bridge, the second rectifier bridge and the controller are respectively arranged in different cabinet bodies, so that the operation is safer; on the other hand, the layout of the transformer cabinet, the rectifier cabinet and the switch cabinet is more compact, and the space utilization rate is improved; on the other hand, the transformer cabinet, the rectifier cabinet and the switch cabinet are more reliably fixed.

Specifically, the cable trench can be further included, the cable trench can be arranged below the ground of a transformer room or a transformer room, the arrangement of the cable trench facilitates the laying of cables entering and exiting the traction power supply equipment, and the establishment of wired electrical property or communication connection among the transformer cabinet, the rectifier cabinet and the switch cabinet is facilitated.

In any of the above technical solutions, further, the traction power supply apparatus further includes: the control button is connected with the controller and can control the start and stop of the controller; the touch screen is arranged on the switch cabinet and connected to the controller, and the touch screen is used for controlling the first rectifier bridge and the second rectifier bridge to output direct current in a series or parallel mode through the controller.

In the technical scheme, the traction power supply equipment further comprises a control button and a touch screen, the traction power supply equipment can be controlled to start and stop through the control button, and the first rectifier bridge and the second rectifier bridge can be controlled to output direct current in a series or parallel mode through the touch screen, so that the traction power supply equipment is more convenient to control.

Specifically, the controller can be used for recording the working state and the fault information of the traction power supply equipment, and the historical record and the fault information of the work of the traction power supply equipment can be displayed through the arrangement of the touch screen, so that the traction power supply equipment can be maintained.

In any of the above technical solutions, further, the method further includes: the twelve-pulse-wave thyristor digital controller is connected with the controller; the first rectifier bridge and the second rectifier bridge are three-phase six-pulse full-control rectifier bridges, the twelve-pulse thyristor digital controller is connected to six thyristors of the first rectifier bridge and six thyristors of the second rectifier bridge, and the twelve-pulse thyristor digital controller can control the starting and stopping of the six thyristors of the first rectifier bridge and the six thyristors of the second rectifier bridge based on a voltage instruction of the controller.

In this technical scheme, further included twelve pulse wave thyristor digital control ware, the style of first rectifier bridge and second rectifier bridge is provided simultaneously, through the selection of six pulse full control rectifier bridges of three-phase, can form twelve pulse wave rectification, the output of first rectifier bridge and second rectifier bridge is controlled by the controller, connect in six thyristors of the six thyristors of first rectifier bridge and the six thyristors of second rectifier bridge through twelve pulse wave thyristor digital control ware, can control the size of first rectifier bridge and second rectifier bridge output voltage, make the controllability of traction power supply equipment stronger. When the controller is in a series mode, the first rectifier bridge and the second rectifier bridge are connected in series to form voltage (the voltage is DC 1000-1800V), and when the controller is in a parallel mode, the two first rectifier bridges and the second rectifier bridge are connected in parallel to output specified voltage (the voltage is DC 500-900V).

In any of the above technical solutions, further, the traction power supply apparatus further includes: the first protection circuit is connected with the anode of the output end of the first rectifier bridge at one end and the cathode of the output end of the first rectifier bridge at the other end, a first diode and a second resistor are arranged on the first protection current, and the second resistor is positioned between the first diode and the anode of the output end of the first rectifier bridge; one end of the second protection circuit is connected to the anode of the output end of the second rectifier bridge, the other end of the second protection circuit is connected to the cathode of the output end of the second rectifier bridge, a second diode and a third resistor are arranged on the second protection current, and the third resistor is located between the second diode and the anode of the output end of the second rectifier bridge; the first load circuit comprises a first direct current reactor, a first filter capacitor and a first aluminum shell resistor, one end of the first aluminum shell resistor is connected to the positive pole of the output end of the first rectifier bridge, the other end of the first aluminum shell resistor is connected to the negative pole of the output end of the first rectifier bridge, and the first direct current reactor is arranged on the positive pole circuit of the output end of the first rectifier bridge and positioned between the first filter capacitor and the first aluminum shell resistor; the second load loop comprises a second direct current reactor, a second filter capacitor and a second aluminum shell resistor, one end of the second aluminum shell resistor is connected to the anode of the output end of the second rectifier bridge, the other end of the second aluminum shell resistor is connected to the cathode of the output end of the second rectifier bridge, and the second direct current reactor is arranged on the anode circuit of the output end of the second rectifier bridge and positioned between the second filter capacitor and the second aluminum shell resistor; and the current equalizing reactor is arranged on the positive electrodes of the output ends of the first rectifier bridge and the second rectifier bridge.

In the technical scheme, the traction power supply equipment further comprises a first protection circuit, a second protection circuit, a first load circuit, a second load circuit and a current sharing reactor. The first protection circuit is arranged to play a role in preventing reverse current protection of the first rectifier bridge; the second protection circuit is arranged to play a role in preventing the current of the second rectifier bridge from being reversely protected; an output dummy load loop of the first rectifier bridge is formed through the arrangement of the first load loop, and the dummy load loop can supply current to the first direct current reactor, so that the situation that the self-inductance voltage of the first direct current reactor is too high to damage a circuit device or insulation is prevented, and the output voltage can be balanced (the voltage fluctuation is restrained); an output dummy load loop of the second rectifier bridge is formed through the arrangement of the second load loop, and the dummy load loop gives follow current to the second direct current reactor, so that the situation that the self-inductance voltage of the second direct current reactor is too high to damage a circuit device or insulation is prevented, and the output voltage can be balanced (the voltage fluctuation is restrained); through the setting of the current sharing reactor, the currents of the first rectifier bridge and the second rectifier bridge can be output in a balanced mode.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural diagram of a traction power supply apparatus provided according to an embodiment of the present invention;

fig. 2 shows a schematic structural diagram of a transformer cabinet provided according to an embodiment of the invention;

fig. 3 shows a schematic structural diagram of a switchgear provided according to an embodiment of the present invention;

FIG. 4 illustrates a schematic view of a basic plan layout of a substation chamber provided according to an embodiment of the present invention;

fig. 5 shows an electrical schematic diagram of a traction power supply apparatus provided in accordance with an embodiment of the invention;

fig. 6 shows a block diagram of a traction power supply apparatus according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 6 is:

2 transformer room, 4 first rectifier bridge, 6 second rectifier bridge, 8 circuit breaker, 10 rectifier cabinet, 12 switch cabinet, 14 control buttons, 16 touch screen, 18 transformer cabinet, 20 transformer, 22 cable trench, 26 transformation component, 28 controller, 30 first resistor, 32 first control switch, 34 second control switch, 36 first diode, 38 second resistor, 40 second diode, 42 third resistor, 44 first direct current reactor, 46 first filter capacitor, 48 first aluminum shell resistor, 50 second direct current reactor, 52 second filter capacitor, 54 second aluminum shell resistor, 56 current equalizing reactor, 58 arrester, 60 twelve-pulse thyristor digital controller, 62 emergency stop button, 64 insulation detection device.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A traction power supply apparatus according to some embodiments of the present invention is described below with reference to fig. 1 to 6.