Grid side circuit of electric locomotive and electric locomotive

Abstract

The utility model discloses a network side circuit of an electric locomotive and the electric locomotive, and relates to the field of vehicle control, a first end of a contact of a first main circuit breaker is connected with a pantograph, a second end of the contact of the first main circuit breaker is respectively connected with a power supply end of a section where the first main circuit breaker is located and a first end of a second main circuit breaker, and the first main circuit breaker is used for connecting the pantograph with the section where the second main circuit breaker is located; the second end of the contact of the second main circuit breaker is connected with the first end of the third main circuit breaker and the second end of the second main circuit breaker of the network side circuit of the car section provided with the pantograph except the car section where the second main circuit breaker is located, and the second main circuit breaker is used for connecting the pantograph with the car sections except the car section where the second main circuit breaker is located. The second end of the contact of the third main circuit breaker is connected with the power supply end of the section where the third main circuit breaker is located and used for being connected with a section provided with a pantograph. The number of abnormal actions of the circuit breaker is smaller than that of the high-voltage isolation switch, and the possibility that locomotive operation is affected by abnormal actions in the operation process of the electric locomotive is reduced. The circuit breaker has arc extinguishing and on-load breaking capabilities, so that arc discharge and influence on the service life are avoided.

Description

Technical Field

[0001] This utility model relates to the field of vehicle control, and in particular to a grid-side circuit for an electric locomotive and the electric locomotive itself. Background Technology

[0002] High-voltage disconnect switches are devices that connect the pantograph, the lifting section, and the non-lifting section. Abnormal operation of high-voltage disconnect switches frequently occurs during electric locomotive operation, affecting locomotive operation. Furthermore, high-voltage disconnect switches lack arc-extinguishing capabilities and load-bearing breaking capacity; abnormal operation will cause arcing, shortening the device's lifespan. Utility Model Content

[0003] The purpose of this application is to provide a grid-side circuit for an electric locomotive and the locomotive itself, in which the circuit breaker experiences fewer abnormal trips than the high-voltage disconnector, reducing the possibility of the locomotive's operation being affected by abnormal trips. The circuit breaker has arc-extinguishing and load-bearing breaking capabilities, avoiding arcing and extending its service life.

[0004] To solve the above-mentioned technical problems, this application provides a grid-side circuit for an electric locomotive, including a grid-side circuit for a car section equipped with a pantograph and a grid-side circuit for a car section without a pantograph.

[0005] The grid-side circuit of the vehicle section equipped with a pantograph includes:

[0006] The first main circuit breaker has a first end of its contacts connected to the pantograph, and a second end connected to the power supply end of the car section to which it is located and the first end of the second main circuit breaker, respectively, so as to connect the pantograph to the car section to which it is located when the contacts are closed, so as to realize power supply.

[0007] The second main circuit breaker has its second contact end connected to the first end of the third main circuit breaker of the grid-side circuit of the locomotive without a pantograph and the second end of the second main circuit breaker of the grid-side circuit of the locomotive with a pantograph other than its own, so as to connect the pantograph to the locomotive other than its own when the contacts are closed, so as to realize power supply.

[0008] The grid-side circuit of a vehicle car without a pantograph includes:

[0009] The third main circuit breaker has its second contact connected to the power supply terminal of the car section it is in, and is used to connect to the car section equipped with a pantograph when the contact is closed, so as to realize power supply.

[0010] On the other hand, the grid-side circuit of the vehicle section equipped with a pantograph also includes a first high-voltage transformer, a first current transformer, and a first transformer.

[0011] The first end of the first high-voltage transformer is connected to the pantograph, and the second end of the first high-voltage transformer is grounded to detect the voltage output by the pantograph.

[0012] The first terminal of the first current transformer is connected to the second terminal of the first main circuit breaker, and the second terminal of the first current transformer is connected to the input terminal of the first transformer, for detecting the current in the branch.

[0013] The output terminal of the first transformer is connected to the power supply terminal of the car section in which it is located for voltage conversion.

[0014] On the other hand, the grid-side circuit of the vehicle section equipped with a pantograph also includes a first surge arrester, a second surge arrester, and a first return current transformer.

[0015] The first terminal of the first surge arrester is connected to the first terminal of the first current transformer, and the second terminal of the first surge arrester is grounded for lightning protection.

[0016] The first end of the second surge arrester is connected to the first end of the first high-voltage transformer, and the second end of the second surge arrester is grounded for lightning protection.

[0017] The first end of the first return current transformer is connected to the output end of the first transformer, and the second end of the first return current transformer is connected to the power supply end of the car section in which it is located, for detecting the current after the first transformer steps down the voltage.

[0018] On the other hand, the grid-side circuit of the vehicle section without a pantograph also includes a second current transformer and a second transformer;

[0019] The first terminal of the second current transformer is connected to the second terminal of the third main circuit breaker, and the second terminal of the second current transformer is connected to the input terminal of the second transformer, for detecting the current in the branch.

[0020] The output terminal of the second transformer is connected to the power supply terminal of the car section in which it is located for voltage conversion.

[0021] On the other hand, the grid-side circuit of the vehicle section without a pantograph also includes a third surge arrester and a second return current transformer;

[0022] The first end of the third surge arrester is connected to the first end of the second current transformer, and the second end of the third surge arrester is grounded for lightning protection.

[0023] The first end of the second return current transformer is connected to the output end of the second transformer, and the second end of the second return current transformer is connected to the power supply end of the car section in which it is located, for detecting the current after the second transformer steps down the voltage.

[0024] On the other hand, the grid-side circuit of the car section equipped with a pantograph also includes a first grounding switch, and the grid-side circuit of the car section without a pantograph also includes a second grounding switch.

[0025] The first terminal of the first grounding switch is connected to the first terminal of the first main circuit breaker, the second terminal of the first grounding switch is connected to the second terminal of the first main circuit breaker, and the third terminal of the first grounding switch is grounded, so as to connect the first terminal, the second terminal and the third terminal so that both ends of the first main circuit breaker are grounded;

[0026] The first terminal of the second grounding switch is connected to the first terminal of the second main circuit breaker, the second terminal of the second grounding switch is connected to the second terminal of the second main circuit breaker, and the third terminal of the second grounding switch is grounded, so as to connect the first terminal, the second terminal and the third terminal, so that both ends of the second main circuit breaker are grounded.

[0027] On the other hand, the grid-side circuit of the vehicle section equipped with a pantograph also includes a toggle switch;

[0028] The first movable end of the first pin of the toggle switch is left floating, the second movable end is left floating, the third movable end is connected to the power supply, the second pin is connected to the control network of the electric locomotive, the first movable end of the third pin is left floating, both the second and third movable ends are connected to the power supply, the fourth pin is connected to the control network of the electric locomotive, the first movable end of the fifth pin is connected to the power supply, the second and third movable ends are left floating, the sixth pin is connected to the control network of the electric locomotive, the first and second movable ends of the seventh pin are both connected to the power supply, the third movable end is left floating, and the eighth pin is connected to the control network of the electric locomotive.

[0029] When the first main circuit breaker and the second main circuit breaker need to disconnect, the first movable terminal of the first pin of the toggle switch is connected to the second pin, the first movable terminal of the third pin is connected to the fourth pin, the first movable terminal of the fifth pin is connected to the sixth pin, and the first movable terminal of the seventh pin is connected to the eighth pin. When the first main circuit breaker and the second main circuit breaker need to lock, the second movable terminal of the first pin of the toggle switch is connected to the second pin, the second movable terminal of the third pin is connected to the fourth pin, the second movable terminal of the fifth pin is connected to the sixth pin, and the second movable terminal of the seventh pin is connected to the eighth pin. When the first main circuit breaker and the second main circuit breaker need to close, the third movable terminal of the first pin of the toggle switch is connected to the second pin, the third movable terminal of the third pin is connected to the fourth pin, the third movable terminal of the fifth pin is connected to the sixth pin, and the third movable terminal of the seventh pin is connected to the eighth pin.

[0030] On the other hand, it also includes the first control switch, the control circuit of the first main circuit breaker and the control circuit of the second main circuit breaker;

[0031] The second end of the coil of the first control switch is grounded. The first end of the contact of the first control switch is connected to the power supply. The second end is connected to the first end of the control circuit of the first main circuit breaker and the first end of the control circuit of the second main circuit breaker. The second end of the control circuit of the first main circuit breaker is connected to the first end of the coil of the first main circuit breaker. The second end of the coil of the first main circuit breaker is grounded. The second end of the control circuit of the second main circuit breaker is connected to the first end of the coil of the second main circuit breaker. The second end of the coil of the second main circuit breaker is grounded.

[0032] The first control switch is used to control the contacts of the first control switch to close when the first end of the coil is connected to the power supply, so that the control circuits of the first main circuit breaker and the second main circuit breaker are energized, the coils of the first main circuit breaker and the second main circuit breaker are energized, and the contacts of the first main circuit breaker and the second main circuit breaker are closed.

[0033] On the other hand, the control circuit of the first main circuit breaker includes a second control switch and a third control switch, and the control circuit of the second main circuit breaker includes a fourth control switch and a fifth control switch.

[0034] The control terminal of the second control switch is connected to the control network of the electric locomotive. The first terminal of the second control switch is connected to the second terminal of the contact of the first control switch. The second terminal of the second control switch is connected to the first terminal of the coil of the third control switch. The second terminal of the coil of the third control switch is grounded. The first terminal of the contact of the third control switch is connected to the second terminal of the contact of the first control switch. The second terminal of the contact of the third control switch is connected to the first terminal of the coil of the first main circuit breaker. The coil of the third control switch is used to be energized when the first terminal and the second terminal of the second control switch are connected, and to control its own contacts to close to supply power to the coil of the first main circuit breaker.

[0035] The control terminal of the fourth control switch is connected to the control network of the electric locomotive. The first terminal of the fourth control switch is connected to the second terminal of the contact of the first control switch. The second terminal of the fourth control switch is connected to the first terminal of the coil of the fifth control switch. The second terminal of the coil of the fifth control switch is grounded. The first terminal of the contact of the fifth control switch is connected to the second terminal of the contact of the first control switch. The second terminal of the contact of the fifth control switch is connected to the first terminal of the coil of the second main circuit breaker. The coil of the fifth control switch is energized when the first terminal and the second terminal of the fourth control switch are connected, and controls its own contacts to close to supply power to the coil of the second main circuit breaker.

[0036] To address the aforementioned technical problems, this application also provides an electric locomotive, including the grid-side circuit of the aforementioned electric locomotive.

[0037] This application provides a grid-side circuit for an electric locomotive and the locomotive itself, relating to the field of vehicle control. A first main circuit breaker has its first contact connected to a pantograph, and its second contact connected to both the power supply terminal of its own carriage and the first contact of a second main circuit breaker, for connecting the pantograph to its own carriage. The second contact of the second main circuit breaker is connected to the first contact of a third main circuit breaker and the second contact of the second main circuit breaker in the grid-side circuit of carriages other than its own that have pantographs, for connecting the pantograph to carriages other than its own. The second contact of the third main circuit breaker is connected to the power supply terminal of its own carriage, for connecting to carriages equipped with pantographs. The circuit breaker operates abnormally less frequently than a high-voltage disconnector, reducing the possibility of abnormal operation affecting locomotive operation. The circuit breaker has arc-extinguishing and load-bearing breaking capabilities, preventing arcing and extending its service life. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the grid-side circuit of an electric locomotive provided in this application;

[0040] Figure 2 A schematic diagram of a control circuit provided in this application;

[0041] Figure 3 This is a schematic diagram of a toggle switch provided in this application. Detailed Implementation

[0042] The core of this application is to provide a grid-side circuit for an electric locomotive and the locomotive itself. The circuit breaker experiences fewer abnormal trips than the high-voltage disconnector, reducing the possibility of abnormal operation affecting locomotive operation. The circuit breaker possesses arc-extinguishing and load-bearing breaking capabilities, preventing arcing and extending its service life.

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Figure 1 The present application provides a schematic diagram of the grid-side circuit of an electric locomotive, which includes a grid-side circuit for a car section equipped with a pantograph and a grid-side circuit for a car section without a pantograph.

[0045] The grid-side circuit of the vehicle section equipped with a pantograph includes:

[0046] The first main circuit breaker 11-Q01 has a first end of its contact connected to the pantograph, and the second end connected to the power supply end of the car section to which it is located and the first end of the second main circuit breaker 11-Q03, respectively. It is used to connect the pantograph to the car section to which it is located when the contacts are closed, so as to realize power supply.

[0047] The second main circuit breaker 11-Q03 has its second contact end connected to the first end of the third main circuit breaker 11-Q05 of the grid-side circuit of the locomotive without a pantograph and the second end of the second main circuit breaker 11-Q03 of the grid-side circuit of the locomotive with a pantograph other than its own. This connection is used to connect the pantograph to the locomotive other than its own when the contacts are closed, so as to achieve power supply.

[0048] The grid-side circuit of a vehicle car without a pantograph includes:

[0049] The third main circuit breaker 11-Q05 has its second contact connected to the power supply terminal of the car section it is in, so as to connect with the car section equipped with a pantograph when the contacts are closed, so as to realize power supply.

[0050] Vacuum circuit breakers experience fewer abnormal trips than high-voltage disconnect switches, reducing the likelihood of locomotive operation being affected by abnormal trips of high-voltage disconnect switches. Vacuum circuit breakers also possess arc-extinguishing capabilities and load-bearing breaking capacity, preventing arcing caused by abnormal trips and ensuring the lifespan of the components.

[0051] This application takes a three-section train as an example, with sections A, B, and C. Sections A and B are equipped with pantographs, while section C is not equipped with a pantograph.

[0052] Table 1 shows the circuit configuration under normal conditions.

[0053] Table 1

[0054]

[0055] Under normal circumstances, the four modes are as follows: in automatic mode, only the pantograph of section B is raised; in front pantograph mode, the pantograph of the control section is raised; in rear pantograph mode, the pantograph of the non-control section is raised; and in single-machine mode, both pantographs are raised.

[0056] In the event of a fault, it is necessary to determine how to control the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03 of sections A and B, depending on whether the current mode is automatic, front bow mode, rear bow mode, or single-machine mode, and whether the faulty section is section A, section B, section C, section A and section C, section B and section C, section A and section B, or section A, section B, and section C.

[0057] Table 2 shows the circuit configuration of section A as the control section under fault conditions.

[0058] Table 2

[0059]

[0060] Table 3 shows the circuit configuration of section B as the control section in case of a fault.

[0061] Table 3

[0062]

[0063] Combined main control:

[0064] If all conditions for closing the main circuit breaker are met, the driver in the occupant's cab can issue a "close the main circuit breaker" command by pushing the "close the main circuit breaker" toggle switch.

[0065] The closing sequence of the main segment is as follows:

[0066] In front bow, rear bow, and automatic modes: close the main sections in the following order: main section 11-Q01 of the rising bow section, main section 11-Q03 of the rising bow section, main section 11-Q03 of the non-rising bow section, and section C Q05, with a time interval of 2 seconds.

[0067] In stand-alone mode: Section C and the control section share a pantograph. The main circuit is closed in the following order: control section main circuit 11-Q01, control section main circuit 11-Q03, and section C Q05, with a time interval of 2 seconds.

[0068] The "close main circuit breaker" command is transmitted to the reconnected vehicle via WTB (or wireless reconnection). To avoid excessive closing current to the power grid, the main circuit breakers of the following vehicles are closed sequentially in the above order, 2 seconds after the main circuit breaker configuration of the preceding vehicle is completed.

[0069] If the main disconnection 11Q01 or 11Q03 is already closed, the corresponding "close main disconnection" command will not work.

[0070] Distributed main control:

[0071] Each failed "allow circuit breaker to close" condition causes the circuit breakers (11-Q01 and 11-Q03) to open;

[0072] The circuit breaker (11-Q01) and the non-panel HVB ​​(11-Q03) can be disconnected by the driver's instruction or excessive phase request, while the circuit breaker (11-Q03) of the panel section remains open;

[0073] If the circuit breakers (11-Q01 and 11-Q03) have been disconnected by the vehicle controller, they should not automatically close after the cause of the disconnection disappears. Instead, the driver should manually close the main disconnect switch and close the circuit breakers (11-Q01 and 11-Q03) in the main disconnect sequence.

[0074] This application provides a grid-side circuit for an electric locomotive and the locomotive itself, relating to the field of vehicle control. The first end of the contact of the first main circuit breaker 11-Q01 is connected to the pantograph, and the second end is connected to both the power supply terminal of its own carriage and the first end of the second main circuit breaker 11-Q03, for connecting the pantograph to its own carriage. The second end of the contact of the second main circuit breaker 11-Q03 is connected to the first end of the third main circuit breaker 11-Q05 and the second end of the grid-side circuit of the second main circuit breaker 11-Q03 in carriages other than its own, for connecting the pantograph to carriages other than its own. The second end of the contact of the third main circuit breaker 11-Q05 is connected to the power supply terminal of its own carriage, for connecting to carriages equipped with pantographs. The number of abnormal circuit breaker operations is less than that of high-voltage disconnect switches, reducing the possibility of abnormal locomotive operation being affected during locomotive operation. Circuit breakers have the ability to extinguish arcs and break circuits under load, thus preventing arcing and affecting their lifespan.

[0075] Based on the above embodiments:

[0076] In some embodiments, the grid-side circuit of the vehicle section equipped with a pantograph further includes a first high-voltage transformer 11-T01, a first current transformer 11-T02, and a first transformer 11-T03.

[0077] The first terminal of the first high-voltage transformer 11-T01 is connected to the pantograph, and the second terminal of the first high-voltage transformer 11-T01 is grounded to detect the voltage output by the pantograph.

[0078] The first terminal of the first current transformer 11-T02 is connected to the second terminal of the first main circuit breaker 11-Q01, and the second terminal of the first current transformer 11-T02 is connected to the input terminal of the first transformer 11-T03, for detecting the current in the branch.

[0079] The output terminal of the first transformer 11-T03 is connected to the power supply terminal of the car section in which it is located for voltage conversion.

[0080] The main transformer steps down the high-voltage electricity transmitted from the power grid by the pantograph, and then supplies power to the vehicle compartment. The first high-voltage transformer 11-T01 collects the high-voltage electricity received by the pantograph and feeds it back to the vehicle controller. The first current transformer 11-T02 collects the current transmitted by the pantograph and feeds it back to the vehicle controller.

[0081] It should be noted that the conditions for closing the circuit breaker are met only when the collected voltage and current are within the normal range. In addition, there are other conditions for closing the circuit breaker, which will not be specified in this application.

[0082] The first transformer, 11-T03, is used to convert the 25kV high-voltage voltage obtained from the contact wire into 970V AC power.

[0083] In some embodiments, the grid-side circuit of the vehicle section equipped with a pantograph further includes a first surge arrester 11-F01, a second surge arrester 11-F02, and a first return current transformer 11-T04.

[0084] The first terminal of the first surge arrester 11-F01 is connected to the first terminal of the first current transformer 11-T02, and the second terminal of the first surge arrester 11-F01 is grounded for lightning protection.

[0085] The first end of the second surge arrester 11-F02 is connected to the first end of the first high-voltage transformer 11-T01, and the second end of the second surge arrester 11-F02 is grounded for lightning protection.

[0086] The first end of the first return current transformer 11-T04 is connected to the output end of the first transformer, and the second end of the first return current transformer 11-T04 is connected to the power supply end of the section where it is located, and is used to detect the current after the first transformer 11-T03 steps down.

[0087] In some embodiments, the grid-side circuit of a vehicle section without a pantograph also includes a second current transformer 11-T05 and a second transformer 11-T07;

[0088] The first terminal of the second current transformer 11-T05 is connected to the second terminal of the third main circuit breaker 11-Q05, and the second terminal of the second current transformer 11-T05 is connected to the input terminal of the second transformer 11-T07, for detecting the current in the branch.

[0089] The output terminal of the second transformer 11-T07 is connected to the power supply terminal of the car section it is in, and is used for voltage conversion.

[0090] Since section C does not have a pantograph, the voltage checks performed in sections A or B do not need to be repeated in section C, saving on components. A current transformer is also installed in section C to check whether the third main circuit breaker 11-Q05 on section C is properly closed, thereby determining whether the power supply is normal.

[0091] High-voltage voltage transformers are mainly used to measure the contact network voltage, and this measured voltage value is used for locomotive control and overvoltage protection. High-voltage current transformers are used to measure the line current at the incoming terminal of the high-voltage winding of the main transformer.

[0092] In some embodiments, the grid-side circuit of a vehicle section without a pantograph also includes a third surge arrester 11-F03 and a second return current transformer 11-T06;

[0093] The first terminal of the third surge arrester 11-F03 is connected to the first terminal of the second current transformer 11-T05, and the second terminal of the third surge arrester 11-F03 is grounded for lightning protection.

[0094] The first end of the second return current transformer 11-T06 is connected to the output end of the second transformer 11-T07, and the second end of the second return current transformer 11-T06 is connected to the power supply end of the car section in which it is located, and is used to detect the current after the second transformer 11-T07 steps down.

[0095] In some embodiments, the grid-side circuit of a vehicle section equipped with a pantograph further includes a first grounding switch 11-Q02, and the grid-side circuit of a vehicle section without a pantograph further includes a second grounding switch 11-Q06.

[0096] The first terminal of the first grounding switch 11-Q02 is connected to the first terminal of the first main circuit breaker 11-Q01, the second terminal of the first grounding switch 11-Q02 is connected to the second terminal of the first main circuit breaker 11-Q01, and the third terminal of the first grounding switch 11-Q02 is grounded, so as to connect the first terminal, the second terminal and the third terminal, so that both ends of the first main circuit breaker 11-Q01 are grounded.

[0097] The first terminal of the second grounding switch 11-Q06 is connected to the first terminal of the second main circuit breaker 11-Q03, the second terminal of the second grounding switch 11-Q06 is connected to the second terminal of the second main circuit breaker 11-Q03, and the third terminal of the second grounding switch 11-Q06 is grounded, which is used to connect the first, second and third terminals so that both ends of the second main circuit breaker 11-Q03 are grounded.

[0098] The main function of the grounding switch is to ground the circuits on both sides of the main circuit breaker on the traction locomotive, and it is used in conjunction with the circuit breaker. The grounding switch ensures the safe operation of the traction locomotive; it also ensures the personal safety of the personnel when they inspect, maintain, eliminate defects, or perform repairs on the locomotive.

[0099] In some embodiments, the grid-side circuit of the vehicle section equipped with a pantograph also includes a toggle switch 21-S05;

[0100] The first movable terminal of the first pin of the toggle switch 21-S05 is left floating, the second movable terminal is left floating, the third movable terminal is connected to the power supply, the second pin is connected to the control network of the electric locomotive, the first movable terminal of the third pin is left floating, both the second and third movable terminals are connected to the power supply, the fourth pin is connected to the control network of the electric locomotive, the first movable terminal of the fifth pin is connected to the power supply, the second and third movable terminals are left floating, the sixth pin is connected to the control network of the electric locomotive, the first and second movable terminals of the seventh pin are both connected to the power supply, the third movable terminal is left floating, and the eighth pin is connected to the control network of the electric locomotive.

[0101] When the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03 need to be disconnected, the first movable terminal of the first pin of the toggle switch 21-S05 is connected to the second pin, the first movable terminal of the third pin is connected to the fourth pin, the first movable terminal of the fifth pin is connected to the sixth pin, and the first movable terminal of the seventh pin is connected to the eighth pin. When the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03 need to be locked, the second movable terminal of the first pin of the toggle switch 21-S05 is connected to the second pin, the second movable terminal of the third pin is connected to the fourth pin, the second movable terminal of the fifth pin is connected to the sixth pin, and the second movable terminal of the seventh pin is connected to the eighth pin. When the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03 need to be closed, the third movable terminal of the first pin of the toggle switch 21-S05 is connected to the second pin, the third movable terminal of the third pin is connected to the fourth pin, the third movable terminal of the fifth pin is connected to the sixth pin, and the third movable terminal of the seventh pin is connected to the eighth pin.

[0102] The toggle switch 21-S05 has three positions and eight pins. The eight pins are divided into four pairs. Pins 1, 3, 5, and 7 each have three movable terminals corresponding to the three positions. Pins 2, 4, 6, and 8 have movable terminals that follow the position. That is, when the toggle switch 21-S05 is pushed to the open position, the first movable terminal of each pair of pins is connected. By setting different movable terminal pins, the second, fourth, sixth, and eighth movable terminals can obtain different signals, which are then sent to the vehicle controller or control network. The control network then determines whether the toggle switch 21-S05 is in the open, closed, or 0 position, and subsequently controls the control circuit of the main circuit breaker.

[0103] It should also be noted that the open position of the toggle switch 21-S05 is 32 degrees backward and can self-reset, while the closed position is 32 degrees forward and can self-reset.

[0104] In the diagram, DIM12, DXM11, DIM12 and DXM11 are all interfaces of the control network.

[0105] In some embodiments, it also includes the control circuits for the first control switch 21-K04, the first main circuit breaker 11-Q01, and the second main circuit breaker 11-Q03;

[0106] The second terminal of the coil of the first control switch 21-K04 is grounded. The first terminal of the contact of the first control switch 21-K04 is connected to the power supply. The second terminal is connected to the first terminal of the control circuit of the first main circuit breaker 11-Q01 and the first terminal of the control circuit of the second main circuit breaker 11-Q03. The second terminal of the control circuit of the first main circuit breaker 11-Q01 is connected to the first terminal of the coil of the first main circuit breaker 11-Q01. The second terminal of the coil of the first main circuit breaker 11-Q01 is grounded. The second terminal of the control circuit of the second main circuit breaker 11-Q03 is connected to the first terminal of the coil of the second main circuit breaker 11-Q03. The second terminal of the coil of the second main circuit breaker 11-Q03 is grounded.

[0107] The first control switch 21-K04 is used to control the contacts of the first control switch 21-K04 to close when the first end of the coil is connected to the power supply, so that the control circuits of the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03 are energized, the coils of the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03 are energized, and the contacts of the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03 are closed.

[0108] When the main circuit breaker allows the controller to determine that the circuit breaker is in a closed condition, the coil of the first control switch 21-K04 is connected to the power supply, and then the first control switch 21-K04 closes. The control circuit of the first main circuit breaker 11-Q01 is energized, and the control circuit of the second main circuit breaker 11-Q03 is energized. This allows the coils of the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03 to be energized, and the contacts of the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03 to be closed, thereby achieving control of the first main circuit breaker 11-Q01 and the second main circuit breaker 11-Q03.

[0109] In some embodiments, the control circuit of the first main circuit breaker 11-Q01 includes a second control switch Q2 and a third control switch 21-K01, and the control circuit of the second main circuit breaker 11-Q03 includes a fourth control switch Q4 and a fifth control switch 21-K06.

[0110] The control terminal of the second control switch Q2 is connected to the control network of the electric locomotive. The first terminal of the second control switch Q2 is connected to the second terminal of the contact of the first control switch 21-K04. The second terminal of the second control switch Q2 is connected to the first terminal of the coil of the third control switch 21-K01. The second terminal of the coil of the third control switch 21-K01 is grounded. The first terminal of the contact of the third control switch 21-K01 is connected to the second terminal of the contact of the first control switch 21-K04. The second terminal of the contact of the third control switch 21-K01 is connected to the first terminal of the coil of the first main circuit breaker 11-Q01. The coil of the third control switch 21-K01 is energized when the first terminal of the second control switch Q2 is connected to the second terminal, and controls its own contacts to close to supply power to the coil of the first main circuit breaker 11-Q01.

[0111] The control terminal of the fourth control switch Q4 is connected to the control network of the electric locomotive. The first terminal of the fourth control switch Q4 is connected to the second terminal of the contact of the first control switch 21-K04. The second terminal of the fourth control switch Q4 is connected to the first terminal of the coil of the fifth control switch 21-K06. The second terminal of the coil of the fifth control switch 21-K06 is grounded. The first terminal of the contact of the fifth control switch 21-K06 is connected to the second terminal of the contact of the first control switch 21-K04. The second terminal of the contact of the fifth control switch 21-K06 is connected to the first terminal of the coil of the second main circuit breaker 11-Q03. The coil of the fifth control switch 21-K06 is used to be energized when the first terminal and the second terminal of the fourth control switch Q4 are connected, and to control its own contacts to close to supply power to the coil of the second main circuit breaker 11-Q03.

[0112] The signal fed back to the control network through the toggle switch 21-S05 then controls the second control switch Q2 to turn on, which in turn energizes the coil of the third control switch 21-K01. The contacts of the third control switch 21-K01 close, which energizes the coil of the first main circuit breaker 11-Q01, thus closing the first main circuit breaker 11-Q01. This is the complete process of closing the first main circuit breaker 11-Q01.

[0113] Similarly, the signal fed back to the control network through the toggle switch 21-S05 will cause the control network to turn on the fourth control switch Q4, which will then energize the coil of the fifth control switch 21-K06. When the contacts of the fifth control switch 21-K06 close, the coil of the second main circuit breaker 11-Q03 will be energized, and the second main circuit breaker 11-Q03 will close. This is the complete process of closing the second main circuit breaker 11-Q03.

[0114] This application also provides an electric locomotive that includes the grid-side circuit of the electric locomotive described above.

[0115] The electric locomotives provided in this application are described in the above embodiments and will not be repeated here.

[0116] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0117] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0118] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A grid-side circuit of an electric locomotive, characterized by comprising: The network side circuit of the car section provided with the pantograph and the network side circuit of the car section without the pantograph; The network side circuit of the car section provided with the pantograph comprises: The first main circuit breaker, the first end of the contact of the first main circuit breaker is connected with the pantograph, the second end is respectively connected with the power supply end of the car section where the first main circuit breaker is located and the first end of the second main circuit breaker, for connecting the pantograph with the car section where the first main circuit breaker is located when the contact is closed, to realize power supply; The second main circuit breaker, the second end of the contact of the second main circuit breaker is connected with the first end of the third main circuit breaker of the network side circuit of the locomotive without the pantograph and the second end of the second main circuit breaker of the network side circuit of the car section provided with the pantograph except the car section where the second main circuit breaker is located, for connecting the pantograph with the car section except the car section where the second main circuit breaker is located when the contact is closed, to realize power supply; The network side circuit of the car section without the pantograph comprises: The third main circuit breaker, the second end of the contact of the third main circuit breaker is connected with the power supply end of the car section where the third main circuit breaker is located, for connecting the car section provided with the pantograph when the contact is closed, to realize power supply.

2. The grid-side circuit of an electric locomotive as claimed in claim 1, characterized in that, The network side circuit of the car section provided with the pantograph further comprises a first high-voltage mutual inductor, a first current mutual inductor and a first transformer; The first end of the first high-voltage mutual inductor is connected with the pantograph, and the second end of the first high-voltage mutual inductor is grounded, for detecting the voltage output by the pantograph; The first end of the first current mutual inductor is connected with the second end of the first main circuit breaker, and the second end of the first current mutual inductor is connected with the input end of the first transformer, for detecting the current of the branch; The output end of the first transformer is connected with the power supply end of the car section where the first transformer is located, for voltage conversion.

3. The grid-side circuit of an electric locomotive as claimed in claim 2, characterized in that, The network side circuit of the car section provided with the pantograph further comprises a first lightning arrester, a second lightning arrester and a first return mutual inductor; The first end of the first lightning arrester is connected with the first end of the first current mutual inductor, and the second end of the first lightning arrester is grounded, for lightning protection; The first end of the second lightning arrester is connected with the first end of the first high-voltage mutual inductor, and the second end of the second lightning arrester is grounded, for lightning protection; The first end of the first return mutual inductor is connected with the output end of the first and transformer, and the second end of the first return mutual inductor is connected with the power supply end of the car section where the first return mutual inductor is located, for detecting the current after the voltage reduction of the first transformer.

4. The net-side circuit of a power car according to claim 1, wherein The network side circuit of the car section without the pantograph further comprises a second current mutual inductor and a second transformer; The first end of the second current mutual inductor is connected with the second end of the third main circuit breaker, and the second end of the second current mutual inductor is connected with the input end of the second transformer, for detecting the current of the branch; The output end of the second transformer is connected with the power supply end of the car section where the second transformer is located, for voltage conversion.

5. The net-side circuit of a power car according to claim 4, wherein The network side circuit of the car section without the pantograph further comprises a third lightning arrester and a second return mutual inductor; The first end of the third lightning arrester is connected with the first end of the second current mutual inductor, and the second end of the third lightning arrester is grounded, for lightning protection; The first end of the second return mutual inductor is connected with the output end of the second transformer, and the second end of the second return mutual inductor is connected with the power supply end of the car section where the second return mutual inductor is located, for detecting the current after the voltage reduction of the second transformer.

6. The net-side circuit of a power car according to claim 1, wherein, The network side circuit of the car section provided with the pantograph further comprises a first grounding switch, and the network side circuit of the car section not provided with the pantograph further comprises a second grounding switch. The first end of the first grounding switch is connected with the first end of the first main circuit breaker, the second end of the first grounding switch is connected with the second end of the first main circuit breaker, and the third end of the first grounding switch is grounded, for connecting the first end, the second end and the third end, so that both ends of the first main circuit breaker are grounded. The first end of the second grounding switch is connected with the first end of the second main circuit breaker, the second end of the second grounding switch is connected with the second end of the second main circuit breaker, and the third end of the second grounding switch is grounded, for connecting the first end, the second end and the third end, so that both ends of the second main circuit breaker are grounded.

7. The net-side circuit of a power car according to claim 1, wherein The network side circuit of the car section provided with the pantograph further comprises a pull key switch. The first active end of the first pin of the pull key switch is suspended, the second active end is suspended, the third active end is connected with the power supply, the second pin is connected with the control network of the electric locomotive, the first active end of the third pin is suspended, the second active end and the third active end are both connected with the power supply, the fourth pin is connected with the control network of the electric locomotive, the first active end of the fifth pin is connected with the power supply, the second active end and the third active end are suspended, the sixth pin is connected with the control network of the electric locomotive, the first active end and the second active end of the seventh pin are both connected with the power supply, and the third active end is suspended, and the eighth pin is connected with the control network of the electric locomotive. When the first main circuit breaker and the second main circuit breaker need to be broken, the first active end of the first pin of the pull key switch is connected with the second pin, the first active end of the third pin is connected with the fourth pin, the first active end of the fifth pin is connected with the sixth pin, and the first active end of the seventh pin is connected with the eighth pin; when the first main circuit breaker and the second main circuit breaker need to be locked, the second active end of the first pin of the pull key switch is connected with the second pin, the second active end of the third pin is connected with the fourth pin, the second active end of the fifth pin is connected with the sixth pin, and the second active end of the seventh pin is connected with the eighth pin; when the first main circuit breaker and the second main circuit breaker need to be closed, the third active end of the first pin of the pull key switch is connected with the second pin, the third active end of the third pin is connected with the fourth pin, the third active end of the fifth pin is connected with the sixth pin, and the third active end of the seventh pin is connected with the eighth pin.

8. The net-side circuit of a power car according to any one of claims 1 to 7, characterized in that, Further comprising a first control switch, a control circuit of the first main circuit breaker and a control circuit of the second main circuit breaker. a second end of a coil of the first control switch is connected to a first end of a control circuit of the first main circuit breaker and a first end of a control circuit of the second main circuit breaker, a second end of the control circuit of the first main circuit breaker is connected to a first end of a coil of the first main circuit breaker, a second end of the coil of the first main circuit breaker is grounded, a second end of the control circuit of the second main circuit breaker is connected to a first end of a coil of the second main circuit breaker, and a second end of the coil of the second main circuit breaker is grounded; the first control switch is configured to control the contacts of the first control switch to close when a first end of the coil is connected to the power source, so that the control circuit of the first main circuit breaker and the control circuit of the second main circuit breaker are powered, the coil of the first main circuit breaker and the coil of the second main circuit breaker are powered, and the contacts of the first main circuit breaker and the contacts of the second main circuit breaker are closed.

9. The net-side circuit of a power car according to claim 8, wherein, the control circuit of the first main circuit breaker includes a second control switch and a third control switch, and the control circuit of the second main circuit breaker includes a fourth control switch and a fifth control switch; a control end of the second control switch is connected to a control network of the electric locomotive, a first end of the second control switch is connected to a second end of the contacts of the first control switch, a second end of the second control switch is connected to a first end of a coil of the third control switch, a second end of the coil of the third control switch is grounded, a first end of the contacts of the third control switch is connected to the second end of the contacts of the first control switch, a second end of the contacts of the third control switch is connected to the first end of the coil of the first main circuit breaker, and the coil of the third control switch is configured to be powered when the first end and the second end of the second control switch are connected, and control the contacts of the third control switch to close to power the coil of the first main circuit breaker; a control end of the fourth control switch is connected to the control network of the electric locomotive, a first end of the fourth control switch is connected to the second end of the contacts of the first control switch, a second end of the fourth control switch is connected to a first end of a coil of the fifth control switch, a second end of the coil of the fifth control switch is grounded, a first end of the contacts of the fifth control switch is connected to the second end of the contacts of the first control switch, a second end of the contacts of the fifth control switch is connected to the first end of the coil of the second main circuit breaker, and the coil of the fifth control switch is configured to be powered when the first end and the second end of the fourth control switch are connected, and control the contacts of the fifth control switch to close to power the coil of the second main circuit breaker.

10. An electric locomotive, characterized in that a network side circuit of an electric locomotive including the network side circuit according to any one of claims 1 to 9.

Images