CN111141988A

CN111141988A - Train power supply load test device

Info

Publication number: CN111141988A
Application number: CN202010116821.7A
Authority: CN
Inventors: 黎莎; 喻贵忠
Original assignee: Beijing Railway Institute of Mechanical and Electrical Engineering Group Co Ltd
Current assignee: Beijing Railway Institute of Mechanical and Electrical Engineering Group Co Ltd
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2020-05-12

Abstract

The embodiment of the invention discloses a train power supply load test device, which comprises a first power connector, a second power connector, a first main contactor, a second main contactor, a rectifying circuit, a switch module, at least two first load modules, a first switch and a second switch which correspond to the first load modules, a pulse voltage detection module and a controller, the controller controls the on or off of the first main contactor, the second main contactor, the first switch and the second switch to realize whether the direct current power supply and the alternating current power supply are connected to the first load or not, the load test method is used for realizing a load detection test, solving the problem that the existing locomotive service section does not have a load test device of a passenger locomotive train power supply system compatible with two power supply systems, and realizing the effect of meeting the load test requirements of trains compatible with two power supply systems of a diesel locomotive and an electric locomotive.

Description

Train power supply load test device

Technical Field

The embodiment of the invention relates to the technical field of locomotive power supply, in particular to a train power supply load test device.

Background

The electric locomotive and the diesel locomotive for main and commercial passenger transport are both provided with train power supply devices to meet the power consumption requirements of electrical appliances such as air conditioners, heating, lighting and furnaces in passenger cars, and the quality of a passenger locomotive power supply system is closely related to the travel life of passengers. Therefore, after the large, medium and small maintenance of the passenger locomotive, the train power supply system of the passenger locomotive must be subjected to relevant test checks, and even the train power supply system at the front of the returning section of the service locomotive on the delivery line should be subjected to relevant test checks, in particular to the load test of the train power supply system of the passenger locomotive.

However, at present, many locomotive service sections serving as passenger transport tasks do not have passenger transport locomotive train power supply system load test equipment compatible with two power supply systems.

Disclosure of Invention

The invention provides a train power supply load test device, which meets the load test requirements of two power supply systems of a compatible diesel locomotive and an electric locomotive.

The embodiment of the invention provides a train power supply load test device, which comprises: the device comprises a first power connector, a second power connector, a first main contactor, a second main contactor, a rectifying circuit, a switch module, at least two first load modules, a first switch and a second switch corresponding to the first load modules, a pulsating voltage detection module and a controller;

the first power connector is used for connecting a direct-current power supply, a first output end of the first power connector is connected with a first load connecting line through the first main contactor, and a second output end of the first power connector is connected with a second load connecting line; the second power connector is used for connecting an alternating-current power supply, the second power connector is electrically connected with the input end of the rectifying circuit, the first output end of the rectifying circuit is connected with the first load connecting line through the second main contactor, the second output end of the rectifying circuit is connected with the second load connecting line, and the pulsating voltage detection module is connected between the first load connecting line and the second load connecting line;

the first end of the first load module is connected with the first load connecting line, the second end of the first load module is connected with the second load connecting line through the corresponding first switch, and the third end of the first load module is connected with the second load connecting line through the corresponding second switch; the first load module is connected with the first load connecting line through the switch module; the first main contactor, the second main contactor, the first switch and the second switch are connected with the controller, the controller controls the connection or disconnection of the first main contactor, the second main contactor, the first switch and the second switch, and the pulsating voltage monitoring module is connected with the controller.

The invention provides a train power supply load test device which comprises a first power connector, a second power connector, a first main contactor, a second main contactor, a rectifying circuit, a switch module, at least two first load modules, a first switch and a second switch corresponding to the first load modules, a pulsating voltage detection module and a controller.

Drawings

Fig. 1 is a structural block diagram of a train power supply load testing device in a first embodiment of the invention;

fig. 2 is a structural block diagram of a train power supply load test device in a second embodiment of the present invention;

fig. 3 is a block diagram of a train power supply load testing apparatus according to another embodiment of the present invention;

fig. 4 shows a computer interface for setting the test state, the test data, and the protection value of the train power supply load test apparatus in the second embodiment of the present invention;

fig. 5 is a computer interface for inquiring test data according to date, model and number of a train power supply load test device in the second embodiment of the invention;

fig. 6 is an alarm display and alarm query computer interface of a train power supply load testing apparatus in the second embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Example one

Fig. 1 is a structural block diagram of a train power supply load test device according to a first embodiment of the present invention. Exemplarily, referring to fig. 1, the train power supply load testing apparatus includes: the controller includes a first power connector 110, a second power connector 120, a first main contactor 130, a second main contactor 140, a rectification circuit 200, a switch module 440, at least two first load modules (for example, referring to fig. 1, two first load modules are shown, a first load module 310 and a second first second load module 410), a first switch 320 and a second switch 330 corresponding to the first load module 310, a first second switch 420 and a second switch 430 corresponding to the first second load module 410, a ripple voltage detection module 150, and a controller 500;

the first power connector 110 is used for connecting a direct current power supply, a first output end of the first power connector 110 is connected with a first load connection line through the first main contactor 130, and a second output end of the first power connector 110 is connected with a second load connection line; the second power connector 120 is used for connecting an alternating current power supply, the second power connector 120 is electrically connected with an input end of the rectifying circuit 200, a first output end of the rectifying circuit 200 is connected with a first load connecting line through the second main contactor 140, a second output end of the rectifying circuit 200 is connected with a second load connecting line, and the pulsating voltage detection module 150 is connected between the first load connecting line and the second load connecting line;

a first end of the first load module 310 is connected with a first load connection line, a second end of the first load module 310 is connected with a second load connection line through a corresponding first switch 320, and a third end of the first load module 310 is connected with the second load connection line through a corresponding second switch 330; a first end of the first second load module 410 is connected with a first load connecting line, a second end of the first second load module 410 is connected with a second load connecting line through a corresponding first second switch 420, and a third end of the first second load module 410 is connected with the second load connecting line through a corresponding second switch 430;

referring to fig. 1, a first load module is connected to a first load connection line through a switch module 440, and a second load module 410 is connected to the first load connection line through the switch module 440; the first main contactor 130, the second main contactor 140, the first switch and the second switch are connected to the controller 500, the controller 500 controls the first main contactor 130, the second main contactor 140, the first switch and the second switch to be turned on or off, and the ripple voltage monitoring module 150 is connected to the controller 500. The first switch includes a first switch 320 and a first second switch 420, the second switch includes a second switch 330 and a second switch 430, and the first switch and the second switch may be dc contactors.

In the technical scheme of this embodiment, this train power supply load test device can satisfy the load test requirement of the train power supply system who gives consideration to internal combustion and electric power passenger locomotive simultaneously, and this train power supply load test device's implementation process is: when a load test needs to be carried out on a power supply system of a train which simultaneously considers internal combustion and an electric power passenger locomotive, the load test implementation process of the power supply system of the electric power supply part of the train is as follows: when a direct current power supply is connected from the first power connector 110, for example, a direct current power supply of 600V or 400kW may be connected, the controller 500 controls the first main contactor 130 to be turned on, and after the first main contactor 130 is turned on, the direct current power supply is transmitted to the first load module a 310 and the first load module b 410, and at the same time, the controller 500 also controls the second switch 330 and the second switch b 430 to be turned on, so that the direct current power supply is transmitted to the first load module a 310 and the first load module b 410, thereby implementing a load capability test on each first load module. Before the dc power flows into the first second load module 410, the controller 500 inputs a PWM wave with a certain duty ratio to the switch module 440 to control the switch module 440 to be turned on, so as to implement stepless regulation of the current flowing into the first load module. In addition, in the whole load test process, the ripple voltage detection module 150 detects the voltage at two ends of the first load module in real time, and sends the detected voltage value to the controller 500, and the controller 500 inputs a PWM wave with a certain duty ratio to the switch module 440 to control the switch module 440 to be turned on, thereby realizing the stepless regulation of the current flowing into the first load module. Similarly, the load test implementation process of the power supply system of the train internal combustion power supply part is as follows: an alternating current power supply is connected to the second power connector 120, for example, a three-phase AC380v, 50hz, 400kW alternating current power supply can be connected, the input alternating current power supply is output as a direct current power supply after being rectified by the rectifying circuit 200, the controller 500 controls the second main contactor 140 to be conducted, the rectified and output direct current power supply is conveyed to the first load module 310 and the first second load module 410 after the second main contactor 140 is conducted, and meanwhile, the controller 500 also controls the first switch 320 and the first second switch 420 to be conducted, so that the direct current power supply is conveyed to the first load module 310 and the first second load module 410, and the load capacity test of each first load module is realized. Before the dc power flows into the first second load module 410, the controller 500 inputs a PWM wave with a certain duty ratio to the switch module 440 to control the switch module 440 to be turned on, so as to implement stepless regulation of the current flowing into the first load module. In addition, in the whole load test process, the ripple voltage detection module 150 detects the voltages at the two ends of the first load module in real time, and sends the detected voltage values to the controller 500, and the controller 500 regulates and controls the voltages of the flowing first load modules according to the detected voltages, so that the control precision is improved. The ripple voltage detection module 150 may be a ripple voltage sensor. Therefore, the train power supply load test device can realize the load test of the power supply system of the train which simultaneously takes account of the internal combustion and the electric power passenger locomotive.

The technical solution of this embodiment is to provide a train power supply load testing apparatus, which includes a first power connector, a second power connector, a first main contactor, a second main contactor, a rectifying circuit, a switch module, at least two first load modules, a first switch and a second switch corresponding to the first load modules, a pulsating voltage detection module, and a controller, the controller controls the on or off of the first main contactor, the second main contactor, the first switch and the second switch to realize whether the direct current power supply and the alternating current power supply are connected to the first load or not, the load test method and the load test device have the advantages that the load test is realized, the problem that the load test device of the power supply system of the passenger locomotive and the train which is compatible with two power supply systems in the existing locomotive service section does not exist is solved, and the effect of meeting the load test requirements of the train which is compatible with the two power supply systems of the diesel locomotive and the electric locomotive is realized.

Example two

Fig. 2 is a block diagram of a structure of a train power supply load testing apparatus provided in the second embodiment of the present invention. Based on the above technical solution, for example, referring to fig. 2, the train power supply load testing device further includes a second load module 650, a third load module 660, and a third switch 610, the first end of the third switch 610 is connected with a first load connection line, the first end of the fourth switch 620 is connected with a second load connection line, the second end of the third switch 610 is electrically connected with the second end of the fourth switch 620, the first end of the fifth switch 630 is electrically connected with the second end of the third switch 610, the second end of the fifth switch 630 is electrically connected with the first end of the second load module 650, the second end of the second load module 650 is grounded, the first end of the sixth switch 640 is electrically connected with the first end of the fifth switch 630, the second end of the sixth switch 640 is electrically connected with the first end of the third load module 660, and the second end of the third load module 660 is electrically connected with the second load module 650.

The third switch 610, the fourth switch 620, the fifth switch 630 and the sixth switch 640 may be dc contactors, and are controlled by the controller 500 to be turned on or off.

When the grounding action test is performed on the power supply system of the electric locomotive DC600V, there are generally four test cases, which are: when the DC600V positive power supply terminal grounding test and the grounding action test are selected, the controller 500 controls the third switch 610 and the fifth switch 630 to be conducted, the DC600V positive power supply terminal is grounded through the second load module 650, and the locomotive grounding protection should be acted. When the negative power supply end grounding test and the grounding action test of the DC600V are selected, the controller 500 controls the fourth switch 620 and the fifth switch 630 to be conducted, the negative power supply end of the DC600V is grounded through the second load module 650, and the locomotive grounding protection should act. When the grounding test and the grounding non-action test of the DC600V positive power supply terminal are selected, the controller 500 controls the third switch 610 and the sixth switch 640 to be conducted, the DC600V positive power supply terminal is grounded through the third load module 660, and the locomotive grounding protection should not be acted. When the negative power supply end grounding test and the grounding non-action test of the DC600V are selected, the controller 500 controls the fourth switch 620 and the sixth switch 640 to be conducted, the negative power supply end of the DC600V is grounded through the third load module 660, and the locomotive grounding protection should not act.

Optionally, with continued reference to fig. 2, the train power supply load testing apparatus further includes a ripple current detection module 160, and the ripple current detection module 160 is connected between the second main contactor 140 and the first load connection line.

The ripple current detection module 160 is further electrically connected to the controller 500, and is configured to detect a current flowing into the first load module and send a detected current value to the controller 500. The ripple current detection module 160 may be a ripple current sensor.

Optionally, with continued reference to fig. 2, the train power supply load testing apparatus further includes an electric plastic housing 170 and an opening and closing control module 180, the electric plastic housing 170 is electrically connected to the second power connector 120 and the rectifying circuit 200, the opening and closing control module 180 is electrically connected to the electric plastic housing 170 and the controller 500, the electric plastic housing 170 is used for controlling connection or disconnection between the second power connector 120 and the rectifying circuit 200, and the opening and closing control module 180 is used for controlling the electric plastic housing 170 to act according to a control signal of the controller 500.

The switching-closing control module 180 controls the electric plastic housing 170 to operate or not to operate according to a control signal sent by the controller 500, and further controls the connection or disconnection between the second power connector 120 and the rectifying circuit 200 by controlling the electric plastic housing 170.

Alternatively, with continued reference to fig. 2, the rectifier circuit 200 includes a rectifier 210 and a trigger 220, an input end of the rectifier 210 is electrically connected to the second power connector 120 through the electric plastic housing 170, a first output end of the rectifier 210 is connected to the first load connection line through the second main contactor 140, a second output end of the rectifier 210 is connected to the second load connection line, the trigger 220 is electrically connected to the rectifier 210 and the controller 500, respectively, and the trigger 220 is configured to trigger the rectifier 210 according to a control signal sent by the controller 500.

Wherein, the controller 500 sends a control signal to the trigger 220 to control the trigger 220 to trigger the rectifier 210.

Optionally, with continued reference to fig. 2, the rectification circuit 200 further includes a three-phase current sensor 230, a three-phase voltage sensor 240 and a phase sequence relay 250, the phase sequence relay 250 is electrically connected to the three-phase voltage sensor 240, the three-phase current sensor 230 and the three-phase voltage sensor 240 are electrically connected to the controller 500, the three-phase current sensor 230 is configured to detect a current signal at the output terminal of the second power connector 120, and the three-phase voltage sensor 240 is configured to detect a voltage signal at the output terminal of the second power connector 120.

It should be noted that the number of the first load modules at least includes 2, and the number of the first load modules can be set according to the actual load test requirement, and the specific number of the first load modules is not specifically described herein. At present, the power supply system of the train is usually tested at 25% load, 50% load, 75% load and 100% load, for example, referring to fig. 2, in order to further describe the power supply system test of the train, fig. 2 exemplarily shows 4 first load modules, namely, a first load module a 310, a first load module b 410, a first load module c 510 and a load module d 710, wherein a first switch a 320 is a switch closed at the time of the 25%, 50%, 75% and 100% load test of the power supply system load test of the internal combustion engine, a first switch b 420 is a switch closed at the time of the 50%, 75% and 100% load test of the power supply system load test of the internal combustion engine, a first switch c 520 is a switch closed at the time of the 75% load test of the power supply system load test of the internal combustion engine, a first switch d 720 is a switch closed at the time of the 100% load test of the power supply system load test of the internal combustion engine, the second switch 330 is a switch closed in a load test of 25%, 50%, 75% and 100% of a load test of the power supply system, the second switch 430 is a switch closed in a load test of 50%, 75% and 100% of the load test of the power supply system, the second switch 530 is a switch closed in a load test of 75% and 100% of the load test of the power supply system, the second switch 730 is a switch closed in a load test of 100% of the load test of the power supply system, the switch module 440 is connected between the first load connecting line and the first load module 710, and the switch control module 440 is used for controlling a direct current power supply to flow into the first load module 710. The first switch a 320, the first switch b 420, the first switch c 520, the first switch d 720, the second switch 330, the second switch b 430, the second switch c 530, and the second switch d 730 may be dc contactors.

In the technical scheme of this embodiment, this train power supply load test device can satisfy the load test requirement of the train power supply system who gives consideration to internal combustion and electric power passenger locomotive simultaneously, and this train power supply load test device's implementation process is: illustratively, referring to fig. 2, when a load test needs to be performed on a power supply system of a train which is compatible with both internal combustion and electric passenger locomotives, the load test on the power supply system of the electric power supply part of the train is implemented by the following steps: when a direct current power supply is connected from the first power connector 110, for example, a direct current power supply of 600V or 400kW can be connected, the controller 500 controls the first main contactor 130 to be turned on, and after the first main contactor 130 is turned on, the direct current power supply is transmitted to the first load module 310, the first second load module 410, the first third load module 510 and the first third load module 710, and at the same time, the controller 500 also controls the second switch 330, the second switch 430, the second third switch 530 and the second third switch 730 to be turned on, so that the direct current power supply is transmitted to the first load module 310, the first second load module 410, the first third load module 510 and the first third load module 710, thereby implementing a load capability test on each first load module. Before the dc power flows into the first load module 710, the controller 500 inputs a PWM wave with a certain duty ratio to the switch module 440 to control the switch module 440 to be turned on, so as to implement stepless regulation of the current flowing into the first load module. In addition, in the whole load test process, the ripple voltage detection module 150 detects the voltages at the two ends of the first load module in real time and sends the detected voltage value to the controller 500, the ripple current detection module 160 detects the current flowing into the first load module in real time and sends the detected current value to the controller 500, and the controller 500 regulates and controls the voltage and the current flowing into each first load module according to the detected voltage and the detected current, so as to improve the control precision. Similarly, the load test implementation process of the power supply system of the train internal combustion power supply part is as follows: an alternating current power supply, such as a three-phase AC380V, 50Hz, 400kW, is connected to the second power connector 120, the input alternating current power supply is rectified by the rectifying circuit 200 and then output as a direct current power supply, the controller 500 controls the second main contactor 140 to be conducted, the second main contactor 140 is conducted, and then the rectified and output direct current power supply is transmitted to the first load module 310, the first load module 410, the first load module 510, and the first load module 710, and at the same time, the controller 500 also controls the first switch 320, the first load switch 420, the first load switch 520, and the first load switch 720 to be conducted, so that the direct current power supply is transmitted to the first load module 310, the first load module 410, the first load module 510, and the first load module 710, thereby implementing the load capacity test of each first load module. Before the dc power flows into the first load module 710, the controller 500 inputs a PWM wave with a certain duty ratio to the switch module 440 to control the switch module 440 to be turned on, so as to implement stepless regulation of the current flowing into the first load module. In addition, in the whole load test process, the ripple voltage detection module 150 detects the voltages at the two ends of the first load module in real time and sends the detected voltage value to the controller 500, the ripple current detection module 160 detects the current flowing into the first load module in real time and sends the detected current value to the controller 500, and the controller 500 regulates and controls the voltage and the current flowing into each first load module according to the detected voltage and the detected current, so as to improve the control precision. The ripple voltage detection module 150 may be a ripple voltage sensor, and the ripple current detection module 160 may be a ripple current sensor. Therefore, the train power supply load test device can realize the load test of the power supply system of the train which simultaneously takes account of the internal combustion and the electric power passenger locomotive.

Optionally, referring to fig. 3, the train power supply load test device further includes a rectifying phase-shift adjusting potentiometer 11, the rectifying phase-shift adjusting potentiometer 11 is electrically connected to the controller 500 and the trigger 220, and the rectifying phase-shift adjusting potentiometer 11 is configured to adjust the output of the trigger signal of the trigger 220 according to the control signal sent by the controller 500.

When a load test is performed, a test user can adjust the trigger 220 through the rectifying phase-shifting potentiometer 11 to adjust the adjustment parameter of the rectifier 210.

Optionally, with continued reference to fig. 3, the train power supply load testing apparatus further includes a three-phase voltmeter 21, a three-phase ammeter 22, a wattmeter 23, a dc voltmeter 24 and a dc ammeter 25, and the three-phase voltmeter 21, the three-phase ammeter 22, the wattmeter 23, the dc voltmeter 24 and the dc ammeter 25 are all electrically connected to the controller 500.

The controller 500 displays the voltage value output by the three-phase voltage sensor 240 through the three-phase voltmeter 21, the controller 500 displays the current value output by the three-phase current sensor 230 through the three-phase ammeter 22, the controller 500 displays the voltage value output by the pulsating voltage detection module 150 through the direct current voltmeter 24, the controller 500 displays the current value output by the pulsating current detection module 160 through the direct current ammeter 25, the controller 500 calculates a corresponding power value according to the voltage value output by the three-phase voltage sensor 240 and the current value output by the three-phase current sensor 230 and displays the power value through the power meter, and the controller 500 calculates a corresponding power value according to the voltage value output by the pulsating voltage detection module 150 and the current value output by the pulsating current detection module 160 and displays the power value through the power meter. Wherein, under the condition of selecting the load test mode of the power supply system of the internal combustion engine, the direct current voltmeter 24 and the direct current ammeter 25 display the rectified voltage and current values.

In addition, under the condition of selecting a load test mode of the power supply system of the internal combustion engine, firstly setting the alternating current overvoltage, the alternating current overcurrent and the power overload to proper values, and then carrying out a step-by-step loading test; under the condition of selecting a load test mode of the power supply system, firstly setting the direct current overvoltage, the direct current overcurrent and the power overload to proper values, and then carrying out a step-by-step loading test. The power overload setting is set by a panel potentiometer, and the overvoltage and overcurrent values are set by computer buttons.

Optionally, with reference to fig. 3, the train power supply load test device further includes a PWM potential adjuster 12, a power supply system selection switch 13, a cooling fan start/stop switch 14, a main contactor on/off control switch 15, a load gear selection switch 16, a grounding action/non-action switch 17, and a power regulation potentiometer 18, where the PWM potential adjuster 12 is electrically connected to the controller and the switch module 440, and the PWM potential adjuster 12 is configured to send a PWM control signal to the switch module 440 according to a control signal sent by the controller 500; the power supply system selection switch 13, the cooling fan start/stop switch 14, the main contactor on-off control switch 15, the load gear selection switch 16 and the grounding action/non-action switch 17 are all electrically connected with the controller 500.

When the power supply mode is switched, the power supply mode may be switched when the first main contactor 130 and the second main contactor 140 are in an open state. During testing, the load test mode of the internal combustion engine power supply system or the load test mode of the electric power supply system is selected through the power supply system selection switch 13. After the power supply mode is selected by the power supply system selection switch 13, the cooling fan start/stop switch 14 is started, and the main contactor on/off control switch 15 is turned on, the step-by-step loading test can be performed.

When the load test mode of the internal combustion engine power supply system is selected, the PWM potentiometer 12 always outputs a high level, referring to fig. 2, that is, the switch module 440 is always in a conducting state when the first switch 720 is closed, the power is steplessly adjusted by the power adjustment potentiometer 18, and the sudden load-shedding impact test is performed by the first switch 320, the first switch 420, the first switch 520, and the first switch 720. When the load test mode of the power supply system is selected, the power is adjusted steplessly by the PWM potentiometer 12, and a sudden load-shedding impact test is performed by the second switch 330, the second switch 430, the second switch 530, and the second switch 730. The stability of the power supply voltage of the locomotive power supply device is tested by sudden loading and unloading impact, and the overcurrent protection point of the locomotive power supply device is tested by stepless power regulation.

Optionally, with reference to fig. 3, the train power supply load test device further includes a power supply system selection indicator lamp 31, a cooling fan starting contactor 32, and an alarm buzzer 33, where the power supply system selection indicator lamp 31, the cooling fan starting contactor 32, and the alarm buzzer 33 are all electrically connected to the controller 500.

When a load test of a power supply system of the internal combustion engine is selected, the power supply system selection indicator lamp 31 is turned on in a green state; when the load test of the power supply system is selected, the power supply system selection indicator lamp 31 is turned on in red. During testing, when a fault occurs, the controller 500 controls the alarm buzzer 33 to give an alarm, after the alarm occurs, a tester can find out the reason of the alarm on a computer, eliminate the alarm factor and press the fault reset button to remove the alarm, and then the tester can test again.

In addition, the train power supply load test device can meet the requirements of two power supply systems compatible with three-phase AC380V and DC600V and a load test function with the rated power of 400kW, has double display modes of instrument display and computer display, has the protection functions of overvoltage, overcurrent, overload, phase sequence and the like, has a loading mode combining stepping load increasing and reducing and stepless adjustment, and can perform impact loading test and accurately test overload points. The DC600V power supply locomotive ground protection function can be tested. And the test data is automatically recorded, and the test data recording and recording device has the functions of test state display, test data storage, test data printing, test data query and alarm query. The display interfaces of the data are rich and diverse, for example, a computer interface for setting the test state, the test data display and the protection value can refer to fig. 4, a computer interface for inquiring the test data according to the date, the vehicle type and the vehicle number can refer to fig. 5, and a computer interface for alarming display and alarming inquiry can refer to fig. 6.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The utility model provides a train power supply load test device which characterized in that includes: the device comprises a first power connector, a second power connector, a first main contactor, a second main contactor, a rectifying circuit, a switch module, at least two first load modules, a first switch and a second switch corresponding to the first load modules, a pulsating voltage detection module and a controller;

2. The train power supply load test device according to claim 1, further comprising a second load module, a third switch, a fourth switch, a fifth switch and a sixth switch, a first end of the third switch is connected with the first load connecting line, a first end of the fourth switch is connected with the second load connecting line, a second terminal of the third switch is electrically connected with a second terminal of the fourth switch, a first terminal of the fifth switch is electrically connected with a second terminal of the third switch, a second end of the fifth switch is electrically connected with a first end of the second load module, a second end of the second load module is grounded, the first end of the sixth switch is electrically connected with the first end of the fifth switch, the second end of the sixth switch is electrically connected with the first end of the third load module, and the second end of the third load module is electrically connected with the second load module.

3. The train power supply load test device of claim 1, further comprising a ripple current detection module connected between the second main contactor and the first load connection line.

4. The train power supply load test device according to claim 1, further comprising an electric plastic case and an opening and closing control module, wherein the electric plastic case is electrically connected with the second power connector and the rectifying circuit respectively, the opening and closing control module is electrically connected with the electric plastic case and the controller respectively, the electric plastic case is used for controlling the second power connector to be connected or disconnected, and the opening and closing control module is used for controlling the electric plastic case to act according to a control signal of the controller.

5. The train power supply load test device according to claim 1, wherein the rectifier circuit comprises a rectifier and a trigger, an input end of the rectifier is electrically connected with the second power connector, a first output end of the rectifier is connected with the first load connection line through the second main contactor, a second output end of the rectifier is connected with the second load connection line, the trigger is electrically connected with the rectifier and the controller respectively, and the trigger is used for triggering the rectifier according to a control signal sent by the controller.

6. The train power supply load test device according to claim 5, wherein the rectification circuit further comprises a three-phase current sensor, a three-phase voltage sensor and a phase sequence relay, the phase sequence relay is electrically connected with the three-phase voltage sensor, the three-phase current sensor and the three-phase voltage sensor are electrically connected with the controller, the three-phase current sensor is used for detecting a current signal at the output end of the second power connector, and the three-phase voltage sensor is used for detecting a voltage signal at the output end of the second power connector.

7. The train power supply load test device according to claim 5, further comprising a rectifying phase shift adjusting potentiometer electrically connected to the controller and the trigger, wherein the rectifying phase shift adjusting potentiometer is configured to adjust an output of a trigger signal of the trigger according to a control signal sent by the controller.

8. The train power supply load test device according to claim 1, further comprising a three-phase voltmeter, a three-phase ammeter, a wattmeter, a direct current voltmeter and a direct current ammeter, wherein the three-phase voltmeter, the three-phase ammeter, the wattmeter, the direct current voltmeter and the direct current ammeter are electrically connected with the controller.

9. The train power supply load test device according to claim 1, further comprising a PWM potential regulator, a power supply system selection switch, a cooling fan start/stop switch, a main contactor on/off control switch, a load gear selection switch, and a grounding action/non-action switch, wherein the PWM potential regulator is electrically connected to the controller and the switch module, and the PWM potential regulator is configured to send a PWM control signal to the switch module according to a control signal sent by the controller; the power supply system selection switch, the cooling fan start/stop switch, the main contactor on-off control switch, the load gear selection switch and the grounding action/non-action switch are all electrically connected with the controller.

10. The train power supply load test device according to claim 1, further comprising a power supply system selection indicator lamp, a cooling fan starting contactor and an alarm buzzer, wherein the power supply system selection indicator lamp, the cooling fan starting contactor and the alarm buzzer are all electrically connected with the controller.