CN113074969B - Loading test method for medium-high frequency auxiliary power supply system of urban rail vehicle - Google Patents
Loading test method for medium-high frequency auxiliary power supply system of urban rail vehicle Download PDFInfo
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- CN113074969B CN113074969B CN202110459711.5A CN202110459711A CN113074969B CN 113074969 B CN113074969 B CN 113074969B CN 202110459711 A CN202110459711 A CN 202110459711A CN 113074969 B CN113074969 B CN 113074969B
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention relates to a loading test method for a medium-high frequency auxiliary power supply system of an urban rail vehicle, which comprises a static test and a dynamic test, wherein the static test comprises a non-grid-connected working condition auxiliary power supply start-stop test, an auxiliary power supply load shedding test, a grid-connected start-stop test and an auxiliary power supply fault simulation test so as to simulate various working conditions related to vehicle operation and monitor a medium-high frequency auxiliary power supply box and the working condition of a charger thereof; the dynamic test simulates the working conditions of each vehicle in the online operation process on a test run line, and monitors the working conditions of the medium-high frequency auxiliary power box and the charger thereof. The loading test method for the medium-high frequency auxiliary power supply system of the urban rail vehicle comprehensively covers various working conditions related to train operation, and can fully verify the medium-high frequency auxiliary power supply system through the loading test.
Description
Technical Field
The invention belongs to the technical field of loading tests, and particularly relates to a loading test method for a medium-high frequency auxiliary power supply system of an urban rail vehicle.
Background
The auxiliary power supply system provides electric energy for vehicle-mounted equipment except a train traction system, and is one of core systems of train rail transit equipment. In order to adapt to the development directions of energy conservation, weight reduction, high efficiency and safety of urban rail trains, China has developed a medium-high frequency auxiliary power supply system (see patent CN111439126A) of the urban rail trains, and the medium-high frequency isolation technology is adopted to realize the light weight and miniaturization of an auxiliary converter, so that the power density of an auxiliary power supply is improved, the electric energy conversion efficiency is improved, and the weight of the whole system is reduced. However, when a loading test is performed on a medium-high frequency auxiliary power supply system, the loading test method for the traditional auxiliary power supply system cannot be well applied. Therefore, how to provide a standardized loading test method for a high-frequency auxiliary power supply system in an urban rail vehicle is a technical problem which needs to be solved urgently at present.
Disclosure of Invention
Aiming at the technical problems, the invention provides a loading test method for a medium-high frequency auxiliary power supply system of an urban rail vehicle, which is designed according to the topological structure and the electrical principle characteristics of the medium-high frequency auxiliary power supply system, comprehensively covers various working conditions related to train operation, and can fully verify the medium-high frequency auxiliary power supply system through a loading test.
The invention provides a loading test method of a medium-high frequency auxiliary power supply system of an urban rail vehicle, wherein the loading test comprises a static test and a dynamic test,
the static test comprises the following steps:
the method comprises the following steps of (1) starting and stopping tests of the auxiliary power supply under the non-grid-connected working condition: putting 1500V high voltage, controlling the medium-high frequency auxiliary power box to be tested to independently operate, and monitoring whether the medium-high frequency auxiliary power box can normally output; giving a stop command, and monitoring whether the medium-high frequency auxiliary power box can be normally shut down;
auxiliary power supply loading and unloading test: putting 1500V high voltage, after the medium-high frequency auxiliary power box to be tested operates independently and outputs normally, putting and cutting 20%, 50% and 100% of loads into and out of the medium-high frequency auxiliary power box respectively, and monitoring whether the medium-high frequency auxiliary power box and a charger thereof can output normally or not respectively;
grid-connected start-stop test: connecting a network system to a medium-high frequency auxiliary power supply system, putting 1500V high voltage, controlling all medium-high frequency auxiliary power supply boxes to be in grid-connected operation after all medium-high frequency auxiliary power supply boxes carried on a vehicle reach a starting condition, monitoring whether all medium-high frequency auxiliary power supply boxes and a charger thereof can normally output, monitoring whether the harmonic content of the output voltage of each medium-high frequency auxiliary power supply box is less than 3%, controlling to cut all medium-high frequency auxiliary power supply boxes, monitoring whether each medium-high frequency auxiliary power supply box can normally stop the vehicle, and monitoring whether the current increment caused by instant impact of the vehicle stop is less than 50A;
simulating an auxiliary power supply fault test: putting 1500V high voltage, putting all loads after all the medium-high frequency auxiliary power boxes are normally connected to the grid and run, cutting off the control power of other residual medium-high frequency auxiliary power boxes except one medium-high frequency auxiliary power box to be tested, and monitoring whether the medium-high frequency auxiliary power box to be tested and a charger thereof can normally output;
wherein, the dynamic test comprises the following steps:
the method comprises the steps of inputting 1500V high voltage, after a vehicle traction system normally operates and all medium-high frequency auxiliary power boxes are in grid-connected operation, respectively testing on a test line under the condition that all medium-high frequency auxiliary power boxes normally output and only one medium-high frequency auxiliary power box normally outputs, starting various loads of a vehicle during testing, respectively placing a main control handle at a maximum traction level, a coasting level and a maximum common brake level, and simultaneously monitoring whether the medium-high frequency auxiliary power boxes and a charger thereof can normally output or not in real time.
In some embodiments of the present invention, the standard for judging the normal output of the medium-high frequency auxiliary power box is: and if the voltage of the alternating current output by the medium-high frequency auxiliary power box is within the range of 380V +/-19V and the frequency is within the range of 50Hz +/-0.5 Hz, judging that the alternating current is normally output.
In some embodiments of the present invention, the standard for judging the normal output of the charger is: and if the voltage of the direct current output by the charger is within the range of 110V +/-3.3V, judging that the direct current is normally output.
In some embodiments of the invention, in the static test, in the non-grid-connected working condition auxiliary power supply start-stop test and the auxiliary power supply load shedding test, before the test, an auxiliary high-voltage box for connecting a workshop power supply cable to the medium-high frequency auxiliary power supply system is included, the auxiliary high-voltage box change-over switch is arranged at a workshop power supply position or a pantograph position, and a medium-voltage bus contactor box of the medium-high frequency auxiliary power supply system is disconnected.
In some embodiments of the invention, in the static test, the grid-connected start-stop test and the single auxiliary power supply fault test, before the test, the auxiliary high-voltage box is connected with a workshop power supply cable to the medium-high frequency auxiliary power supply system, and the auxiliary high-voltage box change-over switch is arranged at a workshop power supply position or a pantograph position.
In some embodiments of the present invention, in the static test, the specific steps of the grid-connected operation of the plurality of medium-high frequency auxiliary power supply boxes are as follows: and the network system executes grid connection logic, the first inverter is started, and each slave inverter is started sequentially and completes the closing of the output contactor.
In some embodiments of the present invention, in the dynamic test, the specific steps of the master control handle gate movement are as follows: the main control handle is quickly pushed to the maximum traction level, when the vehicle speed reaches 60km/h, the main control handle is pulled back to the idle position, and after the vehicle runs for a period of time, the main control handle is quickly pulled to the maximum service braking position.
In some embodiments of the present invention, the dynamic test further comprises a step of placing the switch of the auxiliary high-voltage box in the pantograph position before the dynamic test.
In some embodiments of the invention, the static test further comprises an electrical interface checking step: the device is used for checking whether the connection positions of main cables of high-voltage loops of an auxiliary high-voltage box, a medium-high frequency auxiliary power supply box and a medium-voltage bus contactor box in a medium-high frequency auxiliary power supply system are correct, checking whether the connection torque is appropriate, checking whether anti-loosening marks and nameplate marks are complete or not, and checking whether connectors of an MVB, Ethernet connectors, control line connectors and equipment grounding wires are all connected or not.
In some embodiments of the invention, the static test further comprises a low pressure test step: the device is used for checking whether the polarity of a 110V input power supply of an auxiliary high-voltage box, a medium-high frequency auxiliary power supply box and a medium-voltage bus contactor box is correct, checking whether the network interface connection is correct, and checking whether the medium-high frequency auxiliary power supply boxes of all the stations in the TCMS screen network communication state of the cab are all on line.
Based on the technical scheme, the loading test method for the high-frequency auxiliary power supply system in the urban rail vehicle provided by the invention simulates various working conditions related to vehicle operation through a series of loading test items such as a non-grid-connected working condition auxiliary power supply start-stop test, an auxiliary power supply load shedding test, a parallel start-stop test, a simulated auxiliary power supply fault test, a dynamic operation test and the like, so that the loading of the high-frequency auxiliary power supply system in the urban rail vehicle is fully verified. In addition, according to the topological structure and the electrical principle characteristics of the medium-high frequency auxiliary power supply system, the voltage stability precision and the frequency precision of the auxiliary power supply are improved, and the method is more suitable for the loading test of the medium-high frequency auxiliary power supply system.
Detailed Description
The technical solutions in the embodiments are described clearly and completely below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention relates to a loading test method for a medium-high frequency auxiliary power supply system of an urban rail vehicle, which is used for a loading test of the medium-high frequency auxiliary power supply system.
In the loading test method, the static test comprises the following steps:
(1) non-grid-connected working condition auxiliary power supply start-stop test
Connecting a workshop power cable to an auxiliary high-voltage box, placing an auxiliary high-voltage box change-over switch at a workshop power position or a pantograph position, disconnecting a medium-voltage bus contactor box, putting 1500V high voltage, starting only a medium-high frequency auxiliary power box to be tested to realize independent operation of the single medium-high frequency auxiliary power box, monitoring the voltage and frequency of alternating current output by the medium-high frequency auxiliary power box, and judging that the medium-high frequency auxiliary power box normally outputs if the voltage of the alternating current output by the medium-high frequency auxiliary power box is within a range of 380V +/-19V and the frequency is within a range of 50Hz +/-0.5 Hz; giving a stop command, and if the medium-high frequency auxiliary power supply box can be normally stopped, passing the test.
(2) Auxiliary power supply load and unload test
Connecting a workshop power cable to the auxiliary high-voltage box, placing an auxiliary high-voltage box change-over switch at a workshop power position or a pantograph position, disconnecting the medium-voltage bus contactor box, putting 1500V high voltage, and starting only the medium-high frequency auxiliary power box to be tested so as to realize the independent operation of the single medium-high frequency auxiliary power box; after the medium-high frequency auxiliary power box can normally output 380V alternating current and 110V direct current, respectively putting and cutting 20%, 50% and 100% of loads (including alternating current loads such as an air compressor, an air conditioner, an electric heater and the like) into and out of the medium-high frequency auxiliary power box, and respectively monitoring the voltage and the frequency of alternating current output by the medium-high frequency auxiliary power box and the voltage of direct current output by a charger of the medium-high frequency auxiliary power box; if the voltage of the alternating current output by the medium-high frequency auxiliary power box is within the range of 380V +/-19V, the frequency is within the range of 50Hz +/-0.5 Hz, and the voltage of the direct current output by the charger is within the range of 110V +/-3.3V, the medium-high frequency auxiliary power box and the charger thereof can normally output.
(3) Grid-connected start-stop test step
Connecting a network system to a medium-high frequency auxiliary power supply system, connecting a workshop power cable to an auxiliary high-voltage box, arranging an auxiliary high-voltage box change-over switch at a workshop power position or a pantograph position, putting 1500V high voltage, executing grid-connected logic by the network system after all medium-high frequency auxiliary power supply boxes carried on a vehicle reach a starting condition, starting a first inverter, and sequentially starting each slave inverter and completing the closing of an output contactor so as to enable all medium-high frequency auxiliary power supply boxes to run in a grid-connected mode; monitoring the voltage and frequency of alternating current output by each medium-high frequency auxiliary power supply box and the voltage of direct current output by a charger thereof, wherein if the voltage of the alternating current output by each medium-high frequency auxiliary power supply box is within the range of 380V +/-19V and the frequency of the alternating current output by each medium-high frequency auxiliary power supply box is within the range of 50Hz +/-0.5 Hz, the voltage of the direct current output by the charger is within the range of 110V +/-3.3V and the harmonic content of the output voltage of the medium-high frequency auxiliary power supply box is less than 3 percent, the grid-connected operation is normal; and controlling to cut off all the medium-high frequency auxiliary power supply boxes, and if each medium-high frequency auxiliary power supply box can be normally stopped and the current increment caused by the instant impact of the stop is less than 50A, passing the test.
(4) Simulated auxiliary power failure test
Connecting a workshop power cable to an auxiliary high-voltage box, placing an auxiliary high-voltage box change-over switch at a workshop power level or a pantograph level, putting 1500V high voltage, putting all loads after all medium-high frequency auxiliary power boxes are normally connected to the grid and run, cutting off control power of other residual medium-high frequency auxiliary power boxes except one medium-high frequency auxiliary power box to be tested so as to simulate the faults of the medium-high frequency auxiliary power box, monitoring the voltage and the frequency of alternating current output by the medium-high frequency auxiliary power box to be tested and the voltage of direct current output by a charger thereof under the working condition that only one medium-high frequency auxiliary power box normally works, and if the voltage of alternating current output by the medium-high frequency auxiliary power box is within the range of 380V +/-19V, the frequency is within the range of 50Hz +/-0.5 Hz and the voltage of direct current output by the charger is within the range of 110V +/-3.3V, carrying out the operation of the high-high frequency auxiliary power box in a single station under the fault condition, and the charger outputs normally, passing the test.
In some embodiments, the static test further comprises an electrical interface checking step: the device is used for checking whether the connection position of the main cable of the high-voltage loop of each box body in the medium-high frequency auxiliary power supply system is correct, checking whether the connection torque is proper, checking whether the contents of the anti-loosening mark and the nameplate mark are complete, and checking whether the connector, the Ethernet connector, the control wire connector and the equipment grounding wire of the MVB are all connected.
In some embodiments, the static test further comprises a low pressure test step: the system is used for checking whether the polarity of the 110V input power supply of the auxiliary high-voltage box, the medium-high frequency auxiliary power supply box and the medium-voltage bus contactor box is correct, checking whether the network interface connection is correct, and checking whether the medium-high frequency auxiliary power supply boxes of all the stations are on line in the TCMS screen network communication state of the cab.
In the loading test method, the dynamic test comprises the following steps:
the method comprises the steps of arranging a change-over switch of an auxiliary high-voltage box at a pantograph position, putting 1500V high voltage, performing tests on a test line under the condition that all medium-high frequency auxiliary power boxes normally output and only one medium-high frequency auxiliary power box normally outputs after a vehicle traction system normally operates and all medium-high frequency auxiliary power boxes are in grid-connected operation, starting various loads (including an air conditioner, an electric heater, a television, an electric lamp and the like) of a vehicle during the tests, rapidly pushing a main control handle to a maximum traction level, pulling the main control handle back to an idling position after the vehicle speed reaches 60km/h, rapidly pulling the main control handle to a maximum common brake level after the vehicle runs for a period of time, and monitoring whether the medium-high frequency auxiliary power boxes and a charger thereof can normally output or not in real time in the whole test process.
According to the loading test method for the high-frequency auxiliary power supply system in the urban rail vehicle, various working conditions related to vehicle operation are simulated through a series of loading test items such as the auxiliary power supply start-stop test under the non-grid-connected working condition, the auxiliary power supply load shedding test, the parallel start-stop test, the auxiliary power supply fault simulation test, the dynamic operation test and the like, and the full verification of the loading of the high-frequency auxiliary power supply system in the urban rail vehicle is realized. Moreover, according to the method for testing the loading of the medium-high frequency auxiliary power supply system of the urban rail vehicle, the voltage stability precision and the frequency precision of the auxiliary power supply are improved according to the topological structure and the electrical principle characteristics of the medium-high frequency auxiliary power supply system, and the method is more suitable for the loading test of the medium-high frequency auxiliary power supply system.
Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications of the embodiments of the invention or equivalent substitutions for parts of the technical features are possible; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. A loading test method for a high-frequency auxiliary power supply system in an urban rail vehicle comprises a static test and a dynamic test,
the static test comprises the following steps:
the method comprises the following steps of (1) starting and stopping tests of the auxiliary power supply under the non-grid-connected working condition: inputting 1500V high voltage, controlling the medium-high frequency auxiliary power box to be tested to independently operate, and monitoring whether the medium-high frequency auxiliary power box can normally output; giving a stop command, and monitoring whether the medium-high frequency auxiliary power box can be normally stopped;
auxiliary power supply loading and unloading test: inputting 1500V high voltage, respectively inputting and cutting 20%, 50% and 100% of loads into and out of the medium-high frequency auxiliary power box after the medium-high frequency auxiliary power box to be tested operates independently and outputs normally, and respectively monitoring whether the medium-high frequency auxiliary power box and a charger thereof can output normally or not;
grid-connected start-stop test: connecting a network system to the medium-high frequency auxiliary power supply system, putting 1500V high voltage, controlling all medium-high frequency auxiliary power supply boxes to run in a grid-connected mode after all medium-high frequency auxiliary power supply boxes carried on a vehicle reach a starting condition, monitoring whether each medium-high frequency auxiliary power supply box and a charger thereof can normally output, controlling whether the harmonic content of the output voltage of each medium-high frequency auxiliary power supply box is less than 3%, cutting all medium-high frequency auxiliary power supply boxes, monitoring whether each medium-high frequency auxiliary power supply box can normally stop the vehicle, and monitoring whether the current increment caused by instantaneous impact of the vehicle stop is less than 50A;
simulating an auxiliary power supply fault test: putting 1500V high voltage, putting all loads after all the medium-high frequency auxiliary power supply boxes are normally operated in a grid-connected mode, cutting off the control power of other residual medium-high frequency auxiliary power supply boxes except one medium-high frequency auxiliary power supply box to be tested, and monitoring whether the medium-high frequency auxiliary power supply box to be tested and a charger thereof can normally output;
the dynamic test comprises the following steps:
the method comprises the steps of inputting 1500V high voltage, after a vehicle traction system normally operates and all the medium-high frequency auxiliary power boxes are in grid-connected operation, respectively testing on a test line under the condition that all the medium-high frequency auxiliary power boxes normally output and only one medium-high frequency auxiliary power box normally outputs, starting various loads of a vehicle during testing, respectively placing a main control handle at a maximum traction level, an idle running level and a maximum common braking level, and simultaneously monitoring whether the medium-high frequency auxiliary power boxes and a charger thereof can normally output or not in real time.
2. The urban rail vehicle medium-high frequency auxiliary power supply system loading test method according to claim 1, characterized in that the standard for judging the normal output of the medium-high frequency auxiliary power supply box is as follows: and if the voltage of the alternating current output by the medium-high frequency auxiliary power box is within the range of 380V +/-19V and the frequency is within the range of 50Hz +/-0.5 Hz, judging that the alternating current is normally output.
3. The urban rail vehicle medium-high frequency auxiliary power supply system loading test method according to claim 1 or 2, characterized in that the standard for judging the normal output of the charger is as follows: and if the voltage of the direct current output by the charger is within the range of 110V +/-3.3V, judging that the direct current is normally output.
4. The urban rail vehicle medium-high frequency auxiliary power supply system loading test method according to claim 1, wherein in the static test, in the non-grid-connected working condition auxiliary power supply start-stop test and the auxiliary power supply load shedding test, before the test, an auxiliary high-voltage box for connecting a workshop power supply cable to the medium-high frequency auxiliary power supply system is included, the auxiliary high-voltage box change-over switch is placed at a workshop power supply position or a pantograph position, and a medium-voltage bus contactor box of the medium-high frequency auxiliary power supply system is disconnected.
5. The urban rail vehicle medium-high frequency auxiliary power supply system loading test method according to claim 1, wherein in the static test, in the grid-connected start-stop test and the single auxiliary power supply fault test, before the test, an auxiliary high-voltage box for connecting a workshop power supply cable to the medium-high frequency auxiliary power supply system is included, and the auxiliary high-voltage box change-over switch is placed at a workshop power supply position or a pantograph position.
6. The urban rail vehicle medium-high frequency auxiliary power supply system loading test method according to claim 1 or 5, wherein in the static test, the specific steps of grid-connected operation of a plurality of medium-high frequency auxiliary power supply boxes are as follows: the network system executes grid-connected logic, the first inverter is started, and each slave inverter is started sequentially and completes the closing of the output contactor.
7. The urban rail vehicle medium-high frequency auxiliary power supply system loading test method according to claim 1, wherein in the dynamic test, the specific steps of the movement of the master control handle gate position are as follows: the main control handle is quickly pushed to the maximum traction level, when the vehicle speed reaches 60km/h, the main control handle is pulled back to the idle position, and after the vehicle runs for a period of time, the main control handle is quickly pulled to the maximum service braking position.
8. The method for testing the loading of the high-frequency auxiliary power supply system in the urban rail vehicle as claimed in claim 1 or 7, wherein in the dynamic test, before the test, the method further comprises the step of placing a change-over switch of the auxiliary high-voltage box at a pantograph position.
9. The urban rail vehicle high-frequency auxiliary power supply system loading test method according to claim 1, wherein the static test further comprises an electrical interface checking step of: the method is used for checking whether the connection position of a main cable of a high-voltage loop of an auxiliary high-voltage box, a medium-high frequency auxiliary power box and a medium-voltage bus contactor box in the medium-high frequency auxiliary power supply system is correct, whether the connection torque is suitable is checked, whether the contents of a check anti-loosening mark and a nameplate mark are complete is checked, and whether a connector, an Ethernet connector, a control wire connector and an equipment grounding wire of an MVB are all connected is checked.
10. The urban rail vehicle medium-high frequency auxiliary power supply system loading test method according to claim 1, characterized in that the static test further comprises a low voltage test step: the system is used for checking whether the polarity of a 110V input power supply of an auxiliary high-voltage box, a medium-high frequency auxiliary power supply box and a medium-voltage bus contactor box is correct, checking whether the network interface connection is correct, and checking whether each medium-high frequency auxiliary power supply box is on line in the network communication state of a TCMS screen of a cab.
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