Test device and test method for station building spare power automatic switching function verification

Abstract

The invention discloses a test device and a test method for station building spare power automatic switching function verification, and the device comprises a power module which is used for achieving a group of adjustable three-phase AC voltage and a group of adjustable DC voltage; the analog switch opening and closing signal loop is used for providing a switch opening and closing signal required in the test process of the spare power automatic switching device; the analog switch opening and closing action loop is used for satisfying output verification of action signals of the spare power automatic switching device; the control module is used for man-machine interaction management, test logic and process control, analog switch state management, spare power automatic switching action acquisition and diagnosis and data recording and report generation; and the display module is used for integrating a display screen, an opening switch, a closing switch and a control button. By simulating the working conditions of bus voltage loss, power supply switching and the like in the actual operation of the station building, automatic testing of key parameters such as action logic and response time of the spare power automatic switching device is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of power system automation test, and particularly relates to a test device and a test method for verifying a station house backup power automatic switching function. BACKGROUND

[0002] The related devices for testing the station house backup power automatic switching function still have obvious deficiencies in technical implementation and application effect. Among them, the traditional test scheme mainly relies on manual operation, needs to rely on a relay protection tester to manually simulate a fault condition, and needs to complete test configuration by combining a relay protection tester, a multimeter and an oscilloscope. The key parameters such as action time and logic judgment all rely on manual recording and analysis. Not only is the test efficiency low, but also measurement errors are easily introduced due to human operation differences, which affects the accuracy and reliability of the test results. Although the semi-automatic test platform is improved in technology, the power grid fluctuation scene is simulated by a programmable power supply and an electronic load, and the automatic collection of part of the test parameters is realized by means of a SCADA system. However, the limitations are still not broken through. On the one hand, the design and promotion of the test process need human intervention, and the automatic coverage is limited. On the other hand, the full-process closed-loop verification of the backup power automatic switching function cannot be realized, which leads to the fact that the integrity and precision of the test cannot be fully guaranteed, and it is difficult to match the efficient and comprehensive test requirements of the station house backup power automatic switching system.

[0003] The document named “Necessity of power backup automatic switching device tester” proposes that a special backup automatic switching tester is needed to solve the problems of the traditional test method. The document itself also points out the current common test status: manual test is relied on auxiliary devices such as a relay protection tester, and there are problems such as inaccurate test, missing items and difficult cooperation. SUMMARY

[0004] The purpose of the present application is to provide a test device and a test method for verifying a station house backup power automatic switching function, which realizes the automatic test of key parameters such as action logic and response time of the backup power automatic switching device by simulating bus voltage loss, power switching and other conditions in the actual operation of the station house.

[0005] The technical scheme of the present application is as follows: On the one hand, the present application provides a test device for verifying a station house backup power automatic switching function, which comprises a power module, a simulated switch opening and closing signal loop, a simulated switch opening and closing action loop, a control module and a display module. The control module comprises an MCU module and a photoelectric coupling acquisition module. The simulated switch comprises a simulated switch driving module and a simulated switch relay. The power module is used for realizing a set of adjustable three-phase alternating voltages and a set of adjustable direct voltages; the analog switch opening and closing signal loop is used for providing the opening and closing signals of the switch required in the test process of the backup power automatic switching device; the analog switch opening and closing action loop is used for satisfying the output verification of the action signal of the backup power automatic switching device; the control module is used for human-computer interaction management, test logic and process control, analog switch state management, backup power automatic switching action collection and diagnosis, and data recording and report generation; and the display module is used for integrating opening and closing indicator lights, a display screen, an opening switch, a closing switch and control buttons.

[0006] Preferably, the power module comprises a control unit, an AC-DC-AC structure and a DC-DC conversion structure; the control unit is used for being responsible for PWM generation, voltage and current monitoring, user interface control, and realizing adjustable and protection of output voltages and currents; The AC-DC-AC structure specifically comprises an input EMI filter used for filtering electromagnetic interference in the input alternating current, a rectifier bridge used for rectifying the alternating current into direct current, an isolated DC-DC converter used for converting the direct current into isolated direct current to provide an isolated direct bus, a three-phase inverter used for converting the isolated direct current into adjustable three-phase alternating voltages, and an alternating current output filter used for smoothing the adjustable three-phase alternating voltages output by the three-phase inverter. The DC-DC conversion structure specifically comprises the input EMI filter, the rectifier bridge and the isolated DC-DC converter shared by the AC-DC-AC structure, and a direct current output Buck converter used for generating adjustable direct voltages by step-down from the isolated direct bus, and a direct current output filter used for smoothing the adjustable direct voltages.

[0007] Preferably, in the device, the power module is connected with the analog switch relay through line 1 and line 2; the line 1 and the line 2 are respectively provided with line relay 1 and line relay 2. The analog switch relay comprises first relay 1DL, second relay 2DL and third relay 3DL, the line 1 and the line 2 are connected in series with the first relay 1DL and the second relay 2DL, and the first relay 1DL and the second relay 2DL are connected in series through the third relay 3DL. The first relay 1DL, the second relay 2DL and the third relay 3DL all comprise two sub-relays and a combined relay, one of the two sub-relays receives two-phase alternating voltages of three-phase alternating voltages output by the power module, the other sub-relay receives the remaining one-phase alternating voltage, and the two sub-relays also receive a direct voltage to generate and output a tripping / closing position signal, and the combined relay is used for outputting a combined position signal.

[0008] Preferably, the analog switch opening and closing signal loop is specifically: the auxiliary contact of the analog switch relay is connected to the dry contact of the corresponding spare power automatic switching device through a plug-in terminal, after the MCU module sends a corresponding control signal to the analog switch driving module, the analog switch driving module drives the analog switch relay to output the jump / close position signal to the spare power automatic switching device and drives the post-close position signal to the spare power automatic switching device, so as to realize the distinction between manual tripping and fault tripping and meet the charging and discharging logic of the spare power automatic switching device.

[0009] Preferably, the analog switch opening and closing signal loop is specifically: the auxiliary contact of the analog switch relay is connected to the dry contact of the corresponding spare power automatic switching device through a plug-in terminal, after the MCU module sends a corresponding control signal to the analog switch driving module, the analog switch driving module drives the analog switch relay to output the jump / close position signal to the spare power automatic switching device and drives the post-close position signal to the spare power automatic switching device, so as to realize the distinction between manual tripping and fault tripping and meet the charging and discharging logic of the spare power automatic switching device.

[0010] In another aspect, the application provides a test method for verifying the function of a station spare power automatic switching device, which comprises verifying the function of the spare power automatic switching device in the case of incoming line mutual switching: In the initial state, the MCU module sends a control signal to control the closing of the incoming line relay 1, the opening of the incoming line relay 2, the closing of the first relay 1DL and the third relay 3DL, and the post-close of the post-close relay of the first relay 1DL and the post-close relay of the third relay 3DL, and the tripping of the second relay 2DL; Then the MCU module sends a control signal to control the opening of the incoming line relay 1 and simulate the loss of voltage due to the fault of the incoming line 1, so that the corresponding bus I of the incoming line 1 and the corresponding bus II of the incoming line 2 are both without voltage; After the above actions are completed, the normal spare power automatic switching device sends a first relay 1DL tripping signal within a specified time, after the MCU module receives the first relay 1DL tripping signal sent by the spare power automatic switching device through the optical coupling acquisition module, the MCU module sends a control signal to control the tripping of the first relay 1DL; after the tripping of the first relay 1DL, the corresponding auxiliary contact outputs that the first relay 1DL is in the tripping position; After the first relay 1DL is tripped by the spare power automatic switching device, the spare power automatic switching device sends a second relay 2DL closing signal within a specified time, after the MCU module receives the second relay 2DL closing signal sent by the spare power automatic switching device through the optical coupling acquisition module, the MCU module sends a control signal to control the closing of the second relay 2DL; According to the jump and close positions of each analog switch relay, the opening and closing indicator lights are correspondingly turned on and off; if no corresponding signal is received within a specified time, it is determined that the spare power automatic switching device is abnormal.

[0011] Preferably, the method further comprises performing the backup power automatic switching device function verification in the case of line splitting automatic switching: The initial state MCU module sends a control signal to control the closing of the incoming line relay 1, the closing of the incoming line relay 2, the closing of the first relay 1DL and the second relay 2DL, the closing of the post-closing relay of the first relay 1DL and the post-closing relay of the second relay 2DL, and the tripping of the third relay 3DL; Then the MCU module sends a control signal to control the opening of the incoming line relay 1, simulate the incoming line 1 fault voltage loss, so that the bus I corresponding to the incoming line 1 has no voltage and the bus II corresponding to the incoming line 2 has voltage; After the above actions are completed, the normal backup power automatic switching device sends a first relay 1DL tripping signal within a specified time, and after the MCU module receives the first relay 1DL tripping signal sent by the backup power automatic switching device through the optocoupler acquisition module, the MCU module sends a control signal to control the tripping of the first relay 1DL; after the first relay 1DL trips, the auxiliary contact corresponding to the first relay 1DL outputs that the first relay 1DL is in the tripping position; After the backup power automatic switching device confirms that the first relay 1DL is tripped, the third relay 3DL closing signal is sent within a specified time, and after the MCU module receives the third relay 3DL closing signal sent by the backup power automatic switching device through the optocoupler acquisition module, the MCU sends a control signal to control the closing of the third relay 3DL; According to the tripping and closing positions of each analog switch relay, the opening and closing indicator lights are turned on and off accordingly; if the corresponding signal is not received within a specified time, it is determined that the backup power automatic switching device is abnormal.

[0012] In still another aspect, the present application also provides an electronic device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method according to any one of the embodiments of the present application when executing the computer program.

[0013] Compared with the prior art, the present application has the following technical effects: 1. The AC / DC power supply module developed by the present application supports simultaneous output of a set of three-phase alternating voltage and a set of direct current voltage, has 0-240V output AC voltage adjustable and 0-300V output DC voltage adjustable functions, and has an output voltage stability of ≤1% and an output frequency stability of ≤0.05%. It also meets the requirements of one machine, one breaker and one protection.

[0014] 2. The analog switch opening and closing signal circuit designed by the present application can meet the opening and closing signal required in the test process of the backup power automatic switching device; and the analog switch opening and closing action circuit designed by the present application can meet the output verification of the backup power automatic switching device action signal.

[0015] 3. The secondary line connector developed by the application can match different connection scenes and facilitate field connection. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the overall structure diagram of the test device for verifying the station backup power supply function according to the application; Figure 2 is a schematic diagram of the structure of the analog switch relay; Figure 3 is a schematic diagram of the action circuit of the analog switch; Figure 4 is a schematic diagram of the terminal structure of the backup power supply device. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the application more clear, the technical scheme of the application will be described in detail below with reference to the specific embodiments of the application and the accompanying drawings.

[0018] Embodiment one The embodiment provides a test device for verifying the station backup power supply function, as shown in the accompanying drawings, comprising a power module, an analog switch opening and closing signal circuit, an analog switch opening and closing action circuit, a control module and a display module; the control module comprises an MCU module and an optical coupling acquisition module, and the analog switch comprises an analog switch driving module and an analog switch relay. Figure 1 The power module is used to realize a group of adjustable three-phase alternating voltage (preferably 0-240V in the embodiment) and a group of adjustable direct current voltage (preferably 0-300V in the embodiment) output; the analog switch opening and closing signal circuit is used to provide the opening and closing signal required in the test process of the backup power supply device; the analog switch opening and closing action circuit is used to satisfy the output verification of the action signal of the backup power supply device; the control module is used for human-computer interaction management, test logic and process control, analog switch state management, backup power supply action acquisition and diagnosis, and data recording and report generation; and the display module is used to integrate opening and closing indicator lights, a display screen, an opening switch, a closing switch and control buttons.

[0019] As a preferred embodiment of the embodiment, the power module comprises a control unit, an AC-DC-AC structure and a DC-DC conversion structure; the control unit is used to generate PWM, monitor voltage and current, and control the user interface based on the microcontroller inside the power module, so as to realize the adjustment and protection of the output voltage and current.

[0020]

[0021] ​The AC-DC-AC structure specifically comprises: an input EMI filter for filtering electromagnetic interference in input alternating current (preferably 220V in this embodiment) to improve the EMC performance of the power supply; a rectifier bridge for rectifying alternating current into direct current (preferably about 310V in this embodiment); an isolated DC-DC converter adopting a full-bridge converter and a high-frequency transformer for converting direct current into isolated direct current (preferably 400V in this embodiment) to provide an isolated direct current bus; a three-phase inverter adopting a six-switch full-bridge structure for converting 400V direct current into adjustable three-phase alternating current voltage through SPWM control; and an alternating current output filter adopting an LC filter for smoothing the adjustable three-phase alternating current voltage output by the three-phase inverter to reduce harmonic distortion.

[0022] The DC-DC conversion structure specifically comprises: the input EMI filter, the rectifier bridge, the isolated DC-DC converter, and a direct current output Buck converter shared with the AC-DC-AC structure, for generating adjustable direct current voltage (preferably in the voltage range of 0-110V in this embodiment) from the isolated direct current bus; and a direct current output filter adopting an LC filter for smoothing the adjustable direct current voltage.

[0023] As a preferred implementation of this embodiment, the power supply module in the device is connected to an analog switch relay through line 1 and line 2; the line 1 and the line 2 are respectively provided with line relay 1 and line relay 2.

[0024] The analog switch relay comprises first relay 1DL, second relay 2DL, and third relay 3DL, the line 1 and the line 2 are respectively connected in series with the first relay 1DL and the second relay 2DL, and the first relay 1DL and the second relay 2DL are connected in series through the third relay 3DL.

[0025] As shown in Figure 2 , it is a schematic diagram of an analog switch relay structure, the first relay 1DL, the second relay 2DL, and the third relay 3DL each comprise two sub-relays and a combined relay, one of the two sub-relays receives two-phase alternating current voltage of three-phase alternating current voltage output by the power supply module, the other sub-relay receives the remaining one-phase alternating current voltage, and also receives a direct current voltage to generate and output a tripping / closing position signal, and the combined relay is used to output a combined position signal.

[0026] As a preferred implementation of this embodiment, the analog switch opening and closing signal circuit specifically comprises: auxiliary contacts of the analog switch relay are connected to dry contacts corresponding to the backup power automatic device through plug-in terminals, after the MCU module sends a corresponding control signal to the analog switch driving module, the analog switch driving module drives the sub-relay in the analog switch relay to output a tripping position signal (as shown in Figure 2J2_TWOUT) and the closing position signal (such as Figure 2 J2_HWOUT) to the backup power device and drive the closing relay to output the post-closing position signal (such as Figure 2 J2_HHOUT) to the backup power device, for distinguishing between manual tripping and fault tripping, and satisfying the charge-discharge logic of the backup power device.

[0027] Specifically, when the analog switch is switched on and off, the auxiliary contact of the relay is switched to accurately generate corresponding signals, and the signal parameters meet the input requirements of the backup power device. Further, a manual control mode (the air switch is connected to the analog switch, and the manual mode and the automatic mode are switched by the display module to manually switch on and off) can be provided, and the on-off indicator light can be provided to meet the requirements of different test scenarios.

[0028] As a preferred embodiment of the present embodiment, the analog switch on-off action circuit is composed of an optical coupler, an MCU module, an analog switch driving module, an analog switch relay, and an on-off indicator light. As shown in Figure 3 , the analog switch on-off action circuit specifically comprises: the MCU module can accurately receive the on-off signals (such as 2DLT and 2DLH in Figure 3 ) sent by the backup power device through the optical coupler acquisition module, and send corresponding control signals (such as DL2 in Figure 3 ) to the analog switch driving module, so that the analog switch relay makes corresponding actions, the MCU module sends corresponding signals (such as PC15 in Figure 3 ) to control the on-off indicator light to display the on-off state by analyzing the control signals sent by the backup power device, and compares the action sequence with the expected logic sequence to determine whether the action logic of the backup power device is correct.

[0029] Embodiment Two Correspondingly, the present embodiment provides a test method for verifying the station backup power function, which is realized based on the test device for verifying the station backup power function of embodiment one. The adjustable three-phase alternating current power supply of the power supply module in the test device provides adjustable three-phase voltage (the preferred voltage range of the present embodiment is 0~240V) to the incoming line 1 and the incoming line 2 through the branch switch composed of the magnetic latching relay, and the incoming line branch relay can be controlled to simulate the loss of voltage of the incoming line. The incoming line 1, the incoming line 2, and the corresponding two sections of the busbar I and the busbar II are all simulated by the magnetic latching relay to simulate the circuit breaker, and the display module control button can be used to switch to the external air switch to manually adjust the on-off state. As shown in Figure 4As shown, the incoming line and bus voltages, as well as the open / close position signals and closed position signals of the analog switch relays, are all connected to the automatic transfer switch (ATS) device under test via terminal blocks. Open / close indicator lights display the corresponding open / close and closed signals. The MCU module receives the trip / close signals from the ATS device through an optocoupler acquisition module, and controls the analog switch to perform the corresponding trip / close operations, thereby verifying the protection function of the ATS device.

[0030] Specifically, the method includes: verifying the functionality of the automatic transfer switch under the condition of incoming line mutual transfer (incoming line 1 in operation, incoming line 2 on standby): In the initial state, the MCU module sends a control signal to control the incoming line relay 1 to close and the incoming line relay 2 to open. The first relay 1DL and the third relay 3DL are in the closed position. After the first relay 1DL is closed, the second relay 2DL is in the open position.

[0031] Then the MCU module sends a control signal to open the incoming line relay 1, simulating a fault and loss of voltage in incoming line 1, so that bus I corresponding to incoming line 1 and bus II corresponding to incoming line 2 are both without voltage.

[0032] After completing the above actions, the automatic transfer switch (ATS) will normally issue a trip signal for the first relay 1DL within a specified time. Upon receiving this trip signal from the ATS via the optocoupler acquisition module, the MCU module will issue a control signal to trip the first relay 1DL. After the first relay 1DL trips, its corresponding auxiliary contact will output that the first relay 1DL is in the tripped position.

[0033] After the automatic transfer switch confirms that the first relay 1DL has tripped, it will send a closing signal for the second relay 2DL within a specified time. After the MCU module receives the closing signal of the second relay 2DL sent by the automatic transfer switch through the optocoupler acquisition module, the MCU module will send a control signal to control the second relay 2DL to close.

[0034] The opening and closing indicator lights will illuminate and extinguish accordingly based on the tripping and closing positions of each analog switch relay. If no corresponding signal is received within the specified time, the automatic transfer switch is deemed to be malfunctioning.

[0035] As a preferred embodiment of this invention, the method further includes: verifying the function of the standby automatic transfer device under the condition of automatic transfer switching (both busbars are running, and busbar II is inactive and serving as backup to busbar I): In the initial state, the MCU module sends a control signal to close the incoming line relay 1 and the incoming line relay 2. The first relay 1DL and the second relay 2DL are in the closed position. After the first relay 1DL is closed, the second relay 2DL is in the closed position, and the third relay 3DL is in the tripped position.

[0036] Then the MCU module sends a control signal to open the incoming line relay 1, simulating a fault and loss of voltage in incoming line 1, so that bus I corresponding to incoming line 1 is de-energized and bus II corresponding to incoming line 2 is energized.

[0037] After completing the above actions, the automatic transfer switch (ATS) will normally issue a trip signal for the first relay 1DL within a specified time. Upon receiving this trip signal from the ATS via the optocoupler acquisition module, the MCU module will issue a control signal to trip the first relay 1DL. After the first relay 1DL trips, its corresponding auxiliary contact will output that the first relay 1DL is in the tripped position.

[0038] After the automatic transfer switch confirms that the first relay 1DL has tripped, it will send a closing signal for the third relay 3DL within a specified time. After the MCU module receives the closing signal of the third relay 3DL sent by the automatic transfer switch through the optocoupler acquisition module, the MCU will send a control signal to control the closing of the third relay 3DL.

[0039] The opening and closing indicator lights will illuminate and extinguish accordingly based on the tripping and closing positions of each analog switch relay. If no corresponding signal is received within the specified time, the automatic transfer switch is deemed to be malfunctioning.

[0040] Example 3 This embodiment provides an electronic device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method described in Embodiment 1 of the present invention.

[0041] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0042] Those skilled in the art will recognize that the units and algorithm steps described in the embodiments disclosed herein can be implemented using electronic hardware, computer software, or a combination of electronic hardware and software. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0043] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0044] In the several embodiments provided in this application, any function, if implemented as a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0045] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A test device for verifying a station building automatic switching function, characterized in that, The device comprises a power module, an analog switch opening and closing signal circuit, an analog switch opening and closing action circuit, a control module and a display module; the control module comprises an MCU module and an optical coupling acquisition module; the analog switch comprises an analog switch driving module and an analog switch relay; The power module is used to generate a set of adjustable three-phase alternating voltages and a set of adjustable direct voltages; the analog switch opening and closing signal circuit is used to provide the opening and closing signals required in the test process of the backup power automatic switching device; the analog switch opening and closing action circuit is used to satisfy the output verification of the action signals of the backup power automatic switching device; the control module is used for human-computer interaction management, test logic and process control, analog switch state management, backup power automatic switching action acquisition and diagnosis, and data recording and report generation; and the display module is used to integrate opening and closing indicator lights, a display screen, an opening switch, a closing switch and control buttons. The power module comprises a control unit, an AC-DC-AC structure and a DC-DC conversion structure; the control unit is used to generate PWM, monitor voltages and currents, and control a user interface, so as to realize the adjustment and protection of output voltages and currents; 2. The test device for verifying the station-based automatic switching function according to claim 1, characterized in that, The AC-DC-AC structure specifically comprises an input EMI filter for filtering electromagnetic interference in the input alternating current, a rectifier bridge for rectifying alternating current into direct current, an isolated DC-DC converter for converting direct current into isolated direct current to provide an isolated direct bus, a three-phase inverter for converting the isolated direct current into adjustable three-phase alternating voltage, and an alternating current output filter for smoothing the adjustable three-phase alternating voltage output by the three-phase inverter; The DC-DC conversion structure specifically comprises the input EMI filter, the rectifier bridge and the isolated DC-DC converter shared by the AC-DC-AC structure, and a direct current output Buck converter for generating adjustable direct voltage by stepping down the isolated direct bus, and a direct current output filter for smoothing the adjustable direct voltage. The power module in the device is connected to the analog switch relay through line 1 and line 2; the line 1 and the line 2 are respectively provided with line relays 1 and 2; 3. The test device for verifying the station-based automatic switching function according to claim 1, characterized in that, The analog switch relay comprises first, second and third relays 1DL, 2DL and 3DL; the line 1 and the line 2 are connected in series with the first and second relays 1DL and 2DL, and the first and second relays 1DL and 2DL are connected in series through the third relay 3DL; The first, second and third relays 1DL, 2DL and 3DL each comprise two sub-relays and a combined relay; one of the two sub-relays receives two-phase alternating voltage of the three-phase alternating voltage output by the power module, and the other sub-relay receives the remaining one-phase alternating voltage; in addition, the two sub-relays receive direct voltage to generate and output a jump / closing position signal; and the combined relay is used to output a combined position signal. ​ 4. The test device for verifying the station service automatic switching function according to claim 3, characterized in that, The analog switch opening and closing signal circuit is specifically: the auxiliary contact of the analog switch relay is connected to the dry contact of the corresponding backup power supply device through a plug-in terminal, after the MCU module sends a corresponding control signal to the analog switch driving module, the analog switch driving module drives the sub-relay in the analog switch relay to output a trip / close position signal to the backup power supply device and drives the post-close relay to output a post-close position signal to the backup power supply device, so as to realize the differentiation between manual tripping and fault tripping and meet the charging and discharging logic of the backup power supply device.

5. The test device for verifying the station service automatic switching function according to claim 1, characterized in that, The analog switch opening and closing action circuit is specifically: the MCU module receives the opening and closing signals sent by the backup power supply device through the optical coupling acquisition module, sends corresponding control signals to the analog switch driving module, and makes the analog switch relay perform corresponding actions, the MCU module analyzes the control signals sent by the backup power supply device, sends corresponding signals to control the opening and closing indicator light to display the opening and closing state, and compares the action sequence with the expected logic sequence to determine whether the action logic of the backup power supply device is correct.

6. A test method for verifying a station building automatic switching function, characterized in that, The method is realized based on the device according to any one of claims 1 to 5, and the method comprises backup power supply device function verification in the case of incoming line mutual backup: In the initial state, the MCU module sends a control signal to control the closing of the incoming line relay 1, the opening of the incoming line relay 2, the closing of the first relay 1DL and the third relay 3DL, and the post-close of the post-close relay of the first relay 1DL and the post-close relay of the third relay 3DL, and the tripping of the second relay 2DL; Then, the MCU module sends a control signal to control the opening of the incoming line relay 1 and simulate the incoming line 1 fault voltage loss, so that the corresponding bus I of the incoming line 1 and the corresponding bus II of the incoming line 2 are both without voltage; After the above actions are completed, the normal backup power supply device sends a first relay 1DL tripping signal within a specified time, after the MCU module receives the first relay 1DL tripping signal sent by the backup power supply device through the optical coupling acquisition module, the MCU module sends a control signal to control the tripping of the first relay 1DL; after the tripping of the first relay 1DL, the corresponding auxiliary contact outputs that the first relay 1DL is in the tripping position; After the backup power supply device confirms that the first relay 1DL is tripped, the backup power supply device sends a second relay 2DL closing signal within a specified time, after the MCU module receives the second relay 2DL closing signal sent by the backup power supply device through the optical coupling acquisition module, the MCU module sends a control signal to control the closing of the second relay 2DL; According to the tripping and closing positions of each analog switch relay, the opening and closing indicator light is correspondingly turned on and off; If the corresponding signal is not received within a specified time, it is determined that the backup power supply device is abnormal.

7. The test method for verifying the station service automatic switching function according to claim 6, characterized in that, The method further comprises backup power supply device function verification in the case of branch line backup: In the initial state, the MCU module sends a control signal to control the closing of the incoming line relay 1 and the incoming line relay 2, the closing of the first relay 1DL and the second relay 2DL, and the tripping of the third relay 3DL; Then the MCU module sends a control signal to control the incoming line relay 1 to open, simulate incoming line 1 fault voltage loss, so that the incoming line 1 corresponding bus I has no pressure, incoming line 2 corresponding bus II has pressure; After the above actions are completed, the normal spare automatic switching device sends a first relay 1DL tripping signal within a specified time, and the MCU module receives the first relay 1DL tripping signal sent by the spare automatic switching device through the optical coupling acquisition module, and then the MCU module sends a control signal to control the first relay 1DL to trip; after the first relay 1DL trips, the auxiliary contact corresponding to the first relay 1DL outputs that the first relay 1DL is in the tripping position; After the spare automatic switching device confirms that the first relay 1DL is tripped, the spare automatic switching device sends a third relay 3DL closing signal within a specified time, and the MCU module receives the third relay 3DL closing signal sent by the spare automatic switching device through the optical coupling acquisition module, and then the MCU sends a control signal to control the third relay 3DL to close; According to the tripping and closing positions of each analog switch relay, the opening and closing indication lamp is correspondingly turned on and off; If the corresponding signal is not received within the specified time, it is determined that the spare automatic switching device is abnormal.

8. An electronic device, comprising: A memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of claim 6 or 7 when executing the computer program.

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