Non-normal start test method for revival number platform motor train unit

Abstract

The invention discloses a non-normal start test method for a revival number platform motor train unit, which comprises the following steps of: confirming that an overhead line system is opened and powered off before an experiment, and the motor train unit is in a storage battery disconnection state; preparing a connection tool for testing; confirming that the functions of the auxiliary air compressor, the pantograph and the vacuum circuit breaker are normal; using detection software to confirm that the converter function is normal; the test structure recovers to the original shape; according to the invention, under the condition that the overhead line system has no power and the train unit does not supply high voltage, the non-start test of the motor train unit is completed, the high-voltage grounding risk is avoided, the operation efficiency is improved, the overhead line system grounding and over-current fusing risks caused by EGS misoperation are fundamentally eliminated, and the operation safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of EMU assembly and debugging, and in particular to an emergency start test method for a Fuxing platform EMU. Background Art

[0002] The third-level maintenance cycle of the existing Fuxing EMU is 1.65 million kilometers and a time cycle of 3 years, and the fourth-level maintenance cycle is 3.3 million kilometers and a time cycle of 7.5 years. The emergency start test is an important test during the third and fourth level maintenance of Fuxing EMUs. This test needs to simulate the situation of the EMU battery being low, and the train set is raised to receive current through emergency start. Its purpose is to verify that the emergency start circuit and the components in the circuit are functioning properly.

[0003] When the train is undergoing advanced maintenance, the EGS switch (grounding protection switch) will be turned to the closed position due to maintenance needs. When using emergency start, the emergency start circuit will skip the normal pantograph raising condition detection and VCB (vacuum circuit breaker) closing condition detection and directly supply power to the pantograph valve plate. Therefore, when the EGS is closed, the emergency start test can bypass the train protection logic and allow the train to raise the pantograph and receive current when the high-voltage line is grounded. Once this happens, it will cause the contact network to trip at the least and disconnect at the worst. Therefore, there is a risk of high-voltage grounding in the existing emergency start test.

[0004] In view of the above-mentioned defects, the inventors of the present invention finally obtained the present invention after a long period of research and practice. Summary of the invention

[0005] In order to solve the above technical defects, the technical solution adopted by the present invention is to provide an emergency start test method for Fuxing EMU, comprising the steps of:

[0006] S1: Before the experiment, confirm that the overhead line has been disconnected and the EMU is in the battery disconnected state;

[0007] S2, test preparation connection tooling;

[0008] S3, confirm that the auxiliary air compressor, pantograph and vacuum circuit breaker are functioning normally;

[0009] S4, use the detection software to confirm that the converter functions normally;

[0010] S5, the test structure is restored to its original state.

[0011] Preferably, in step S2, the auxiliary air compressor and the vacuum circuit breaker in the DC distribution cabinet are disconnected, the traction inverter control circuit breaker is disconnected, the contactor control circuit breaker is disconnected, and the emergency start negative line switch is closed; the grounding switch of the grounding switch panel in the DC distribution cabinet is closed, and the emergency start test power line is connected to the control cabinet, wherein the positive line is connected to the input line in the DC distribution cabinet, and the negative line is connected to DC110V-.

[0012] Preferably, in step S3, the auxiliary air compressor start switch in the emergency start switch panel is turned from OFF to ON, and whether the air compressor circuits and components are normal is determined based on whether the auxiliary air compressor is started.

[0013] Preferably, in step S3, the pantograph raising switch remains closed, and whether the pantograph circuits and components are normal is determined based on whether the pantograph is raised.

[0014] Preferably, in step S3, the vacuum circuit breaker closing switch is closed to confirm that the vacuum circuit breaker is closed, the auxiliary air compressor start switch is turned off, and it is determined whether the vacuum circuit breaker circuit and components are normal based on whether the auxiliary air compressor stops.

[0015] Preferably, in step S4, the charger start switch is closed, and after a delay of 15 seconds, the contactor closure status in each AC cabinet is confirmed, and the control cabinet is connected to monitor the closing signal of the converter contactor through an external device with the detection software to determine whether the converter circuits and components are normal.

[0016] Preferably, in step S5, the emergency start switch panel turns the circuit breaker to the off position in the following steps:

[0017] S51, the vacuum circuit breaker closes the switch OFF;

[0018] S52, the charger start switch is OFF;

[0019] S53, the pantograph raising switch is OFF;

[0020] S54, emergency start negative module OFF.

[0021] Preferably, in step S5, the connection input terminal between the external starting power supply and the emergency starting switch panel is disconnected, and the circuit breaker opened during preparation and the grounding switch closed are restored.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can complete the emergency start test of the EMU when the contact network is without electricity and the train set is not supplied with high voltage, thereby avoiding the risk of high-voltage grounding, improving operating efficiency, fundamentally eliminating the risks of contact network grounding and overcurrent fusing caused by EGS misoperation, and improving operating safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of the emergency start test method of the Fuxing EMU;

[0024] Figure 2 A control circuit diagram of the emergency start test method of the Fuxing EMU described in Example 2;

[0025] Figure 3 This is a diagram of the charger controlling the power supply in step S6 described in the second embodiment. DETAILED DESCRIPTION

[0026] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0027] Embodiment 1

[0028] like Figure 1 As shown, Figure 1 A schematic diagram of the process of the emergency start test method of the Fuxing EMU

[0029] The emergency start test method of the Fuxing EMU of the present invention comprises the following steps:

[0030] S1: Before the experiment, confirm that the overhead line has been disconnected and the EMU is in the battery disconnected state;

[0031] S2, test preparation connection tooling;

[0032] S3, confirm that the auxiliary air compressor, pantograph and vacuum circuit breaker are functioning normally;

[0033] S4, use the detection software to confirm that the converter functions normally;

[0034] S5, the test structure is restored to its original state.

[0035] Specifically, in step S2, the auxiliary air compressor and the vacuum circuit breaker in the DC distribution cabinet are disconnected, the traction inverter control circuit breaker is disconnected, the contactor control circuit breaker is disconnected, and the emergency start negative line switch is closed; the grounding switch of the grounding switch panel in the DC distribution cabinet is closed, and the emergency start test power line is connected to the control cabinet, wherein the positive line is connected to the input line in the DC distribution cabinet, and the negative line is connected to DC110V-.

[0036] In step S3, the auxiliary air compressor start switch in the emergency start switch panel is turned from OFF to ON, and whether the air compressor circuits and components are normal is determined based on whether the auxiliary air compressor is started.

[0037] In step S3, the pantograph raising switch is kept closed, and whether the pantograph circuit and components are normal is determined based on whether the pantograph is raised.

[0038] In step S3, the vacuum circuit breaker closing switch is closed, confirming that the vacuum circuit breaker is closed, and disconnecting the auxiliary air compressor start switch, and judging whether the vacuum circuit breaker circuit and components are normal according to whether the auxiliary air compressor stops.

[0039] In step S4, the charger start switch is closed, and after a delay of 15 seconds, the contactor closure status in each AC cabinet is confirmed, and the control cabinet is connected to monitor the closing signal of the converter contactor through an external device with the detection software to determine whether the converter circuit and components are normal.

[0040] Compared with the emergency start test method in the prior art, the present invention changes the test condition to a contact network without electricity. Therefore, due to the contact network without electricity, in step S4, the converter cannot output AC380V to the charger, so it is impossible to confirm that the converter is working properly by confirming that the voltage meter rises. Therefore, the PTU software, i.e., the detection software, is used to directly connect the 7-car converter to read the KM3 / KM4 contactor closing signal to determine that the converter control circuit is normally energized. After correctly receiving the emergency start command, the converter can normally issue a control command, thereby verifying that the converter can work properly while ensuring that the contact network is without electricity.

[0041] In step S5, the emergency start switch panel turns the circuit breaker to the off position in the following steps:

[0042] S51, the vacuum circuit breaker closes the switch OFF;

[0043] S52, the charger start switch is OFF;

[0044] S53, the pantograph raising switch is OFF;

[0045] S54, emergency start negative module OFF.

[0046] In step S5, the connection input terminal of the external starting power supply and the switch panel is disconnected (the wiring in the DC cabinet is disconnected first), and the disconnected circuit breaker and the closed grounding switch during maintenance are restored.

[0047] The emergency start test method in the prior art needs to wait for the train set to be supplied with high voltage. Due to the test requirements of the third and fourth level repair train sets, the time from no power to high voltage supply of the train set is generally 1 day to 1.5 days, and the third and fourth level repair and debugging cycle is generally fixed at 4-5 days. When a fault that affects the subsequent power supply occurs in the test before the high voltage supply, the time for the train set to supply high voltage will be delayed. When the above situation occurs, the time node of the emergency start test and the time to discover possible faults in the emergency start circuit will also be delayed. Normal start tests are often subject to the power supply process and timing. Once the pre-test encounters an obstacle, the entire progress will be delayed. The method of the present invention can be implemented in advance without high voltage electricity, so that faults can be discovered earlier, the flexibility of job scheduling is significantly enhanced, and the overall efficiency is greatly improved.

[0048] The present invention can complete the emergency start test of the EMU when the contact network is without electricity and the train set is not supplied with high voltage, thereby avoiding the risk of high-voltage grounding, improving operating efficiency, fundamentally eliminating the risk of contact network grounding and overcurrent fusing caused by EGS misoperation, and improving operating safety.

[0049] Embodiment 2

[0050] like Figure 2 As shown, Figure 2 is a control circuit diagram of the emergency start test method of the Fuxing EMU described in Example 2; in this specific embodiment, the emergency start test method of the Fuxing EMU includes the steps

[0051] S1. Before the experiment, confirm that the contact network has been disconnected and the EMU is in the battery disconnected state.

[0052] S2, disconnect the auxiliary air compressor and vacuum circuit breaker in the DC distribution cabinet (3 and 6 cars), disconnect the traction converter control (7 car) circuit breaker, disconnect the contactor control (6 and 7 car) circuit breaker, and close the emergency start negative line (6 car) switch. Close the grounding switch of the 100N1 (6 and 7 cars) and 100Q2 (7 car) lines in the DC cabinet. Connect the emergency start test power line in the control cabinet, with the positive line connected to the 102A line in the DC cabinet and the negative line connected to DC110V-.

[0053] S3, in the emergency start switch panel "auxiliary air compressor start" NFB (no-fuse switch) from OFF to ON, confirm that the auxiliary compressor of car 6 is started. That is, by turning on and off the auxiliary air compressor start ESN circuit breaker, confirm that the compressor can start and stop normally through the running sound to confirm Figure 2 The B1A—ESN—ACM—GS—ESN2—100J4 lines and components are normal.

[0054] The pantograph raising switch is closed and maintained to confirm that the pantograph of car 6 is raised. That is, by closing the pantograph raising ESS1 circuit breaker, visually confirm that the pantograph can be raised normally to confirm Figure 2 The B1A—ESS1—pantograph control valve plate 16, 18 points—GS—ESN2—100J4 lines and components are normal.

[0055] The VCB closing switch is closed, confirming that the VCB of car 6 is closed, disconnecting the auxiliary air compressor and starting the NFB, confirming that the compressor stops. That is, by closing the VCB, closing the ESS2 air switch, and confirming that the VCB can be closed normally through the closing sound, to confirm Figure 2 The B1A—ESS2—VCB-M—GS—ESN2—100J4 lines and components are normal.

[0056] S4, the charger start switch is closed, after a delay of 15s, confirm that the MTBMK11 and MTBMK21 contactors in the AC cabinet of car 6 are energized; the CIBMK21 contactor in the AC cabinet of car 7 is energized, use a laptop to connect the Ethernet control unit X17 male connector in the control cabinet of car 7, and use the converter PTU software to monitor the converter KM3 and KM4 contactor closure signals. After confirming that the signal is normal, remove the computer and restore the X17 connector to confirm that the traction converter can receive the emergency start command and the charger can work normally to confirm Figure 2 Among them, B2—ESS3—EVCBR—100J4 line and components are normal; B2—ESS3—EVCBR coil—X2:13 line and components are normal; B2—ESS3—X1:1, 2—X1:3, 4—GS—ESN2—100J4 line and components are normal; B2—ESS3—ECIBMRTD coil—100J4 line and components are normal; B2—ESS3—ECIBMRTD normally open contact—CIBMK23 normally closed contact—CIBMK22 normally closed contact—CIBMK21 coil—GS—ESN2—100J 4 lines and components are normal; B2—ESS3—ECIBMRTD normally open contact—ECIBMR coil—100J4 lines and components are normal; B2—ESS3—ECIBMR normally open contact—MTBMK23 normally closed contact—MTBMK22 normally closed contact—MTBMK21 coil—GS—ESN2—100J4 lines and components are normal; B2—ESS3—ECIBMR normally open contact—MTBMK13 normally closed contact—MTBMK12 normally closed contact—MTBMK11 coil—GS—ESN2—100J4 lines and components are normal.

[0057] S5, follow the steps below to turn the circuit breaker to the off position in the emergency start switch panel: VCB closed OFF → charger start OFF → pantograph raised OFF → emergency start negative OFF. Remove the connection CN between the external starting power supply and the switch panel (disconnect the DC cabinet wiring first). Restore the disconnected circuit breaker and closed grounding switch during maintenance.

[0058] S6, combined with the subsequent high-voltage test, activate the pantograph of the train set once, and confirm that there is no abnormality in the display of the monitor power supply system interface. During the high-voltage supply of the train set, disconnect the first charger control NFB and the second charger control NFB of the 8-car DC cabinet, and confirm that the first charger and the second charger are still working normally on the HMI human-machine interface. After confirming that it is normal, close the first charger control NFB and the second charger control NFB to confirm that the first charger and the second charger are working normally.

[0059] like Figure 3 As shown, Figure 3 This is the charger control power supply diagram of step S6 in Example 2. Step S6 changes the original normal lifting pantograph test to a subsequent high-voltage supply test, which optimizes the process and improves efficiency. In the original emergency start method, since the EMU does not activate the battery, the 103-line powerless charger control circuit cannot obtain power from line B in the figure, but obtains control power through line A. The step-down rectifier circuit of the charger in the emergency start state and the normal high-voltage supply state is the same. Therefore, when the high voltage is on, disconnecting the charger control circuit breaker can simulate the emergency start condition. At this time, the charger can work normally, which verifies that the charger can work normally in the emergency start condition and the corresponding circuit is normal.

[0060] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. An emergency start test method for Fuxing EMU, characterized in that: Includes steps: S1: Before the experiment, confirm that the overhead line has been disconnected and the EMU is in the battery disconnected state; S2, test preparation connection tooling; S3, confirm that the auxiliary air compressor, pantograph and vacuum circuit breaker are functioning normally; S4, use the detection software to confirm that the converter functions normally; S5, the test structure is restored to its original state.

2. The emergency start test method of the Fuxing EMU according to claim 1, characterized in that: In step S2, the auxiliary air compressor and the vacuum circuit breaker in the DC power distribution cabinet are disconnected, the traction converter control circuit breaker is disconnected, the contactor control circuit breaker is disconnected, and the emergency start negative line switch is closed; Close the grounding switch of the grounding switch panel in the DC distribution cabinet, and connect the emergency start test power line to the control cabinet, with the positive line connected to the input line in the DC distribution cabinet and the negative line connected to DC110V-.

3. The emergency start test method of the Fuxing EMU according to claim 2, characterized in that: In step S3, the auxiliary air compressor start switch in the emergency start switch panel is turned from OFF to ON, and whether the air compressor circuits and components are normal is determined based on whether the auxiliary air compressor is started.

4. The emergency start test method of the Fuxing EMU as claimed in claim 3, characterized in that: In step S3, the pantograph raising switch is kept closed, and whether the pantograph circuit and components are normal is determined based on whether the pantograph is raised.

5. The emergency start test method of Fuxing EMU according to claim 4, characterized in that: In step S3, the vacuum circuit breaker closing switch is closed to confirm that the vacuum circuit breaker is closed, the auxiliary air compressor start switch is turned off, and it is determined whether the vacuum circuit breaker circuit and components are normal based on whether the auxiliary air compressor stops.

6. The emergency start test method of Fuxing EMU according to claim 5, characterized in that: In step S4, the charger start switch is closed, and after a delay of 15 seconds, the contactor closure status in each AC cabinet is confirmed, and the control cabinet is connected to monitor the closing signal of the converter contactor through an external device with the detection software to determine whether the converter circuit and components are normal.

7. The emergency start test method of Fuxing EMU according to claim 6, characterized in that: In step S5, the emergency start switch panel is turned to the off position according to the following steps in sequence: S51, the vacuum circuit breaker closes the switch OFF; S52, the charger start switch is OFF; S53, the pantograph raising switch is OFF; S54, emergency start negative module OFF.

8. The emergency start test method of the Fuxing EMU according to claim 7, characterized in that: In step S5, the connection input terminal between the external starting power supply and the emergency starting switch panel is disconnected, and the circuit breaker opened during the preparation and the grounding switch closed are restored.

Images