A test device for automatic verification of relay protection logic of subway power supply system

Abstract

The present invention proposes a test device for automatic verification of relay protection logic of subway power supply system, which relates to the technical field of subway power supply detection. It includes a test switch automatic switching module, a relay protection tester, a power management module, a control module and a display module; the output end of the power management module is respectively connected to the input end of the test switch automatic switching module and the input end of the control module; the output end of the control module is connected to the display module, the control module is connected to the test switch automatic switching module, the relay protection tester is connected to the switch automatic switching module; the test switch automatic switching module is connected to the switch cabinet. It can solve the problem of maintenance quality caused by differences in personnel skills, realize the unification of test technology standards, and comprehensively improve the purpose of maintenance quality.

Description

Technical Field

[0001] The invention relates to the technical field of subway power supply detection, and in particular to a test device for automatic verification of relay protection logic of a subway power supply system. Background Art

[0002] With the rapid development of urban rail transit, in order to ensure the reliability of subway power supply system operation, relay protection technology has also developed rapidly, such as current differential matching protection scheme, digital communication current protection scheme, etc., which have been greatly promoted due to their wide adaptability and completeness of the scheme. A complete scheme means that the complexity of the logic function is further increased. The occurrence of a fault involves the synchronous judgment of the logic between the power supply and multiple switches. Any error in any link will cause a tripping in the power supply partition, so a higher requirement is placed on the integrity of the relay protection logic function verification.

[0003] The traditional test scheme uses a relay protection tester to directly verify the protection function of a single device or a single device in the power supply system. By manually adjusting the test switch wiring method repeatedly, the locking and unlocking of different switch protection actions are verified and the test results are recorded one by one. At the same time, the test personnel must have a deep understanding and mastery of the logic design principles of the protection scheme. This method is inefficient, and the work intensity is extremely high to complete the maintenance task with high quality in a limited time. When encountering sites with a large number of switch cabinets, multiple groups of personnel are required to cooperate, and the on-site construction safety organization faces difficulties at the same time. The level of personnel is uneven, and the maintenance quality cannot be reliably guaranteed. The existing mature protection schemes involve multiple switches and even logical judgments between substations. There are very few people in the existing production teams who are proficient in the use of technical solutions, and the test results cannot be reliably guaranteed. Therefore, a test device for automatic verification of relay protection logic in subway power supply systems is needed. Summary of the invention

[0004] The purpose of the present invention is to provide a test device for automatic verification of relay protection logic of subway power supply system, which can solve the problem of maintenance quality caused by differences in personnel skills, achieve the purpose of unifying test technical standards and comprehensively improving maintenance quality.

[0005] The embodiment of the present invention is achieved as follows:

[0006] In a first aspect, an embodiment of the present application provides a test device for automatic verification of relay protection logic of a subway power supply system, comprising a test switch automatic switching module, a relay protection tester, a power management module, a control module and a display module; the output end of the power management module is respectively connected to the input end of the test switch automatic switching module and the input end of the control module; the output end of the control module is connected to the display module, the control module is connected to the test switch automatic switching module, and the relay protection tester is connected to the switch automatic switching module; the test switch automatic switching module is connected to the switch cabinet.

[0007] In some embodiments of the present invention, the test switch automatic switching module includes an analog control module and an input / output drive module respectively connected to the control module, and the input / output drive module is connected to the relay protection tester.

[0008] In some embodiments of the present invention, the analog quantity control module includes an analog quantity input interface J1, an analog quantity input interface J5, a relay JK1, a relay JK2, a diode D1, a diode D2, a field effect transistor Q1, a field effect transistor Q2, a resistor R1 and a resistor R2; the static contacts of the relay JK1 and the relay JK2 are connected correspondingly, the moving contact No. 5 of the relay JK1 is connected to the pin No. 4 of the analog quantity input interface J5; the moving contact No. 6 of the relay JK1 is connected to the pin No. 4 of the analog quantity input interface J1; the moving contact No. 7 of the relay JK1 is connected to the pin No. 3 of the analog quantity input interface J5; the moving contact No. 8 of the relay JK1 is connected to the pin No. 3 of the analog quantity input interface J1; the moving contact No. 9 of the relay JK1 is connected to the pin No. 2 of the analog quantity input interface J5; the moving contact No. 10 of the relay JK1 Connected to pin 2 of analog input interface J1; No. 11 moving contact of relay JK1 is connected to pin 1 of analog input interface J5; No. 12 moving contact of relay JK1 is connected to pin 1 of analog input interface J1; moving contacts of relay JK2 are respectively connected to switch cabinets; the switch control input end of relay JK1 is connected to the drain of field effect tube Q1, and the gate of field effect tube Q1 is connected to the source of field effect tube Q1 through resistor R1; the switch control output end of relay JK1, relay JK2 and the drain of field effect tube Q2 are connected in sequence, and the gate of field effect tube Q2 is connected to the source of field effect tube Q2 through resistor R2; diode D1 is connected in parallel with relay JK1, and diode D2 is connected in parallel with relay JK2; the gate of field effect tube Q1 and the gate of field effect tube Q2 are respectively connected to the control module.

[0009] In some embodiments of the present invention, the input-output drive module includes an interface J3 and a reset module, a closing module, a circuit breaker closing position feedback module, and a circuit breaker opening position feedback module respectively connected to the interface J3, the interface J3 is connected to the switch cabinet, the input ends of the reset module and the closing module are respectively connected to the control module, the output ends of the reset module and the closing module are respectively connected to the switch cabinet, the input ends of the circuit breaker closing position feedback module and the circuit breaker opening position feedback module are connected to the switch cabinet, and the output ends of the circuit breaker closing position feedback module and the circuit breaker opening position feedback module are connected to the control module.

[0010] In some embodiments of the present invention, the reset module includes an optocoupler U3, a resistor R3, a resistor R6, a resistor R9, a transistor Q33 and a diode D3; the anode of the optocoupler U3 is connected to the external power supply through the resistor R6, and the cathode of the optocoupler U3 is connected to the control module; the collector of the optocoupler U3 is connected to the interface J3 through the diode D3; the emitter of the optocoupler U3 is grounded through the resistor R9; the collector of the transistor Q33 is connected to the collector of the optocoupler U3, the emitter of the transistor Q33 is connected to the positive electrode of the diode D3 through the resistor R3, and the base of the transistor Q33 is connected to the emitter of the optocoupler U3.

[0011] In some embodiments of the present invention, the closing module includes an optocoupler U6, a resistor R12, a resistor R15, a resistor R18, a transistor Q36 and a diode D6; the anode of the optocoupler U6 is connected to the external power supply through the resistor R15, and the cathode of the optocoupler U6 is connected to the control module; the collector of the optocoupler U6 is connected to the interface J3 through the diode D6; the emitter of the optocoupler U6 is grounded through the resistor R18; the collector of the transistor Q36 is connected to the collector of the optocoupler U6, the emitter of the transistor Q36 is connected to the positive electrode of the diode D6 through the resistor R12, and the base of the transistor Q36 is connected to the emitter of the optocoupler U6.

[0012] In some embodiments of the present invention, the circuit breaker closing position feedback module includes an optocoupler U19, a voltage zener diode D22, a resistor R55, a resistor R56, a resistor R61, a resistor R64, a resistor R65, a diode D19, a capacitor C1 and a light-emitting diode D23; the emitter of the optocoupler U19 is connected to the relay protection tester, and the emitter of the optocoupler U19 is grounded through the resistor R64; the emitter of the optocoupler U19 is grounded through the resistor R65 and the light-emitting diode D23; the collector of the optocoupler U19 is connected to an external power supply; the anode of the optocoupler U19, the voltage zener diode D22, the resistor R56, the resistor R55, the diode D19 and the interface J3 are connected in sequence; the cathode of the optocoupler U19 is connected to the negative electrode of the voltage zener diode through the capacitor C1; the resistor R61 is connected in parallel with the capacitor C1.

[0013] In some embodiments of the present invention, the circuit breaker position feedback module includes an optocoupler U22, a Zener diode D31, a resistor R70, a resistor R71, a resistor R76, a resistor R79, a resistor R80, a diode D28, a capacitor C4 and a light-emitting diode D32; the emitter of the optocoupler U22 is connected to the relay protection tester, and the emitter of the optocoupler U22 is grounded through the resistor R79; the emitter of the optocoupler U22 is grounded through the resistor R80 and the light-emitting diode D32; the collector of the optocoupler U22 is connected to an external power supply; the anode of the optocoupler U22, the Zener diode D31, the resistor R71, the resistor R70, the diode D28 and the interface J3 are connected in sequence; the cathode of the optocoupler U22 is connected to the negative electrode of the Zener diode through the capacitor C4; the resistor R76 is connected in parallel with the capacitor C4.

[0014] In some embodiments of the present invention, the optical coupler U22 adopts the model TLP627-1.

[0015] In some embodiments of the present invention, the control module adopts an ARM core board.

[0016] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0017] During the development, the particularity of the subway shutdown and maintenance time and the importance of power supply system function verification were fully considered. By simplifying the operating procedures, setting up the power management module for power supply, and using the test switch automatic switching module to automatically switch the test switch, the test time is effectively controlled within half an hour, achieving the goal of reducing the number of testers and comprehensively improving work efficiency. The technical staff summarizes the key process steps of the system test, and sets up a display module and a control module for human-computer interaction and preset fault points. After the test switch automatic switching module is connected to the relay protection tester, the analog quantity is input for programmatic control of the test steps. The control module uses an ARM core board, which solves the problem of maintenance quality caused by differences in personnel skills, achieves the goal of unifying test technology standards and comprehensively improving maintenance quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of a test device for automatic verification of relay protection logic of a subway power supply system according to the present invention;

[0020] Figure 2 This is a schematic diagram of the installation of a test device for automatic verification of relay protection logic of a subway power supply system according to the present invention;

[0021] Figure 3 It is a circuit schematic diagram of the analog quantity control module in the present invention;

[0022] Figure 4 is a circuit schematic diagram of the reset module in the present invention;

[0023] Figure 5 It is a circuit schematic diagram of the closing module in the present invention;

[0024] Figure 6 This is a circuit schematic diagram of the circuit breaker closing position feedback module in the present invention;

[0025] Figure 7 This is a circuit schematic diagram of the circuit breaker position feedback module of the present invention;

[0026] Figure 8 It is the circuit principle diagram of the interface J3 in the present invention.

[0027] Icons: 1. Power management module; 2. Control module; 3. Display module; 4. Relay protection tester; 5. Test switch automatic switching module; 6. Switch cabinet. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0032] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In conjunction with the accompanying drawings, some implementation methods of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] Example

[0036] See also Figure 1 and Figure 2 , a test device for automatic verification of relay protection logic of a subway power supply system provided in an embodiment of the present application, includes a test switch automatic switching module 5, a power management module 1, a control module 2 and a display module 3; the output end of the power management module 1 is respectively connected to the input end of the test switch automatic switching module 5 and the input end of the control module 2; the output end of the control module 2 is connected to the display module 3, the control module 2 is connected to the test switch automatic switching module 5, and the test switch automatic switching module 5 is connected to the switch cabinet 6.

[0037] In some embodiments of the present invention, the particularity of the subway shutdown maintenance time and the importance of power supply system function verification are fully considered during development. By simplifying the operating process, setting the power management module 1 for power supply, and using the test switch automatic switching module 5 to automatically switch the test switch, the test time is effectively controlled within half an hour, achieving the purpose of reducing the number of testers and comprehensively improving work efficiency. The technical staff summarizes the key process steps of the system test, and is provided with a display module 3 and a control module 2 for human-computer interaction and preset fault points. After the test switch automatic switching module 5 is connected to the relay protection tester 4, the analog quantity is input for programmed control of the test steps. The control module 2 adopts an ARM core board, which solves the problem of maintenance quality caused by differences in personnel skills, realizes the unification of test technical standards, and comprehensively improves the purpose of maintenance quality. Its specific real-time method is to install the device between the equipment to be tested and the relay protection tester 4 on the basis of the traditional test scheme to realize automatic control of the test process, such as Figure 2 As shown. The analog input of the existing relay protection tester 4 is used on site to independently select the equipment to be tested, and the protection functions of multiple switch cabinets 6 are quickly verified at one time through automatic control of the opening, closing and resetting functions of the switch cabinet 6 to be tested. The battery management module is an existing technology.

[0038] See also Figure 1 In some embodiments of the present invention, the test switch automatic switching module 5 includes an analog control module and an input / output drive module respectively connected to the control module 2 , and the input / output drive module is connected to the relay protection tester 4 .

[0039] For the test switch automatic switching module 5, in order to perform isolation control, separate analog control modules and input and output drive modules are provided to reduce the impact.

[0040] See also Figure 3In some embodiments of the present invention, the analog quantity control module includes an analog quantity input interface J1, an analog quantity input interface J5, a relay JK1, a relay JK2, a diode D1, a diode D2, a field effect transistor Q1, a field effect transistor Q2, a resistor R1 and a resistor R2; the static contacts of the relay JK1 and the relay JK2 are connected correspondingly, the No. 5 moving contact of the relay JK1 is connected to the No. 4 pin of the analog quantity input interface J5; the No. 6 moving contact of the relay JK1 is connected to the No. 4 pin of the analog quantity input interface J1; the No. 7 moving contact of the relay JK1 is connected to the No. 3 pin of the analog quantity input interface J5; the No. 8 moving contact of the relay JK1 is connected to the No. 3 pin of the analog quantity input interface J1; the No. 9 moving contact of the relay JK1 is connected to the No. 2 pin of the analog quantity input interface J5; the No. 10 moving contact of the relay JK1 Connected to pin 2 of analog input interface J1; No. 11 moving contact of relay JK1 is connected to pin 1 of analog input interface J5; No. 12 moving contact of relay JK1 is connected to pin 1 of analog input interface J1; the moving contacts of relay JK2 are respectively connected to switch cabinet 6; the switch control input end of relay JK1 is connected to the drain of field effect tube Q1, and the gate of field effect tube Q1 is connected to the source of field effect tube Q1 through resistor R1; the switch control output end of relay JK1, relay JK2 and the drain of field effect tube Q2 are connected in sequence, and the gate of field effect tube Q2 is connected to the source of field effect tube Q2 through resistor R2; diode D1 is connected in parallel with relay JK1, and diode D2 is connected in parallel with relay JK2; the gate of field effect tube Q1 and the gate of field effect tube Q2 are respectively connected to control module 2.

[0041] In some embodiments of the present invention, the analog quantity control module uses the above connection mode to switch between two relays JK1 and JK2, thereby achieving the input of different analog quantity signals.

[0042] See also Figure 4-8 As shown, in some embodiments of the present invention, the input-output drive module includes an interface J3 and a reset module, a closing module, a circuit breaker closing position feedback module, and a circuit breaker opening position feedback module respectively connected to the interface J3, the interface J3 is connected to the switch cabinet 6, the input ends of the reset module and the closing module are respectively connected to the control module 2, the output ends of the reset module and the closing module are respectively connected to the switch cabinet 6, the input ends of the circuit breaker closing position feedback module and the circuit breaker opening position feedback module are connected to the switch cabinet 6, and the output ends of the circuit breaker closing position feedback module and the circuit breaker opening position feedback module are connected to the control module 2.

[0043] In some embodiments of the present invention, for the input and output drive module, in order to realize the functions of switch cabinet 6 resetting, closing, circuit breaker closing position feedback, and circuit breaker opening position feedback, so as to make the test more accurate, it is further modularized. This setting method can effectively provide stable analog output as the analog input of the control device.

[0044] See also Figure 4 In some embodiments of the present invention, the reset module includes an optical coupler U3, a resistor R3, a resistor R6, a resistor R9, a transistor Q33 and a diode D3; the anode of the optical coupler U3 is connected to the external power supply through the resistor R6, and the cathode of the optical coupler U3 is connected to the control module 2; the collector of the optical coupler U3 is connected to the interface J3 through the diode D3; the emitter of the optical coupler U3 is grounded through the resistor R9; the collector of the transistor Q33 is connected to the collector of the optical coupler U3, the emitter of the transistor Q33 is connected to the positive electrode of the diode D3 through the resistor R3, and the base of the transistor Q33 is connected to the emitter of the optical coupler U3.

[0045] See also Figure 5 In some embodiments of the present invention, the closing module includes an optical coupler U6, a resistor R12, a resistor R15, a resistor R18, a transistor Q36 and a diode D6; the anode of the optical coupler U6 is connected to the external power supply through the resistor R15, and the cathode of the optical coupler U6 is connected to the control module 2; the collector of the optical coupler U6 is connected to the interface J3 through the diode D6; the emitter of the optical coupler U6 is grounded through the resistor R18; the collector of the transistor Q36 is connected to the collector of the optical coupler U6, the emitter of the transistor Q36 is connected to the positive electrode of the diode D6 through the resistor R12, and the base of the transistor Q36 is connected to the emitter of the optical coupler U6.

[0046] In some embodiments of the present invention, the reset module and the closing module use the same principle, respectively using optical coupler U3 and optical coupler U6 to effectively isolate the input and output side circuits electrically; can transmit signals in the form of light; thereby improving the anti-interference effect. Improve the stability of the entire circuit operation. The interface J3 is connected to the switch cabinet 6.

[0047] See also Figure 6In some embodiments of the present invention, the circuit breaker closing position feedback module includes an optical coupler U19, a voltage stabilizing diode D22, a resistor R55, a resistor R56, a resistor R61, a resistor R64, a resistor R65, a diode D19, a capacitor C1 and a light emitting diode D23; the emitter of the optical coupler U19 is connected to the relay protection tester 4, and the emitter of the optical coupler U19 is grounded through the resistor R64; the emitter of the optical coupler U19 is grounded through the resistor R65 and the light emitting diode D23; the collector of the optical coupler U19 is connected to an external power supply; the anode of the optical coupler U19, the voltage stabilizing diode D22, the resistor R56, the resistor R55, the diode D19 and the interface J3 are connected in sequence; the cathode of the optical coupler U19 is connected to the negative electrode of the voltage stabilizing diode through the capacitor C1; the resistor R61 is connected in parallel with the capacitor C1.

[0048] See also Figure 7 In some embodiments of the present invention, the circuit breaker position feedback module includes an optical coupler U22, a voltage stabilizing diode D31, a resistor R70, a resistor R71, a resistor R76, a resistor R79, a resistor R80, a diode D28, a capacitor C4 and a light emitting diode D32; the emitter of the optical coupler U22 is connected to the relay protection tester 4, and the emitter of the optical coupler U22 is grounded through the resistor R79; the emitter of the optical coupler U22 is grounded through the resistor R80 and the light emitting diode D32; the collector of the optical coupler U22 is connected to an external power supply; the anode of the optical coupler U22, the voltage stabilizing diode D31, the resistor R71, the resistor R70, the diode D28 and the interface J3 are connected in sequence; the cathode of the optical coupler U22 is connected to the negative electrode of the voltage stabilizing diode through the capacitor C4; the resistor R76 is connected in parallel with the capacitor C4.

[0049] In some embodiments of the present invention, the circuit breaker closing position feedback module and the circuit breaker closing position feedback module have the same principle, and both use optical coupling to effectively isolate the input and output side circuits electrically; can transmit signals in the form of light; thereby improving the anti-interference effect. At the same time, a light-emitting diode is provided for prompting, which improves the convenience of test observation.

[0050] In some embodiments of the present invention, the optical coupler U22 adopts the model TLP627-1.

[0051] In some embodiments of the present invention, the control module 2 adopts an ARM core board.

[0052] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0053] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A test device for automatic verification of relay protection logic of subway power supply system, It is characterized in that It includes a test switch automatic switching module, a relay protection tester, a power management module, a control module and a display module; the output end of the power management module is respectively connected to the input end of the test switch automatic switching module and the input end of the control module; the output end of the control module is connected to the display module, the control module is connected to the test switch automatic switching module, the relay protection tester is connected to the switch automatic switching module; the test switch automatic switching module is connected to the switch cabinet; The test switch automatic switching module comprises an analog quantity control module and an input / output drive module respectively connected to the control module, and the input / output drive module is connected to the relay protection tester; The analog quantity control module includes an analog quantity input interface J1, an analog quantity input interface J5, a relay JK1, a relay JK2, a diode D1, a diode D2, a field effect transistor Q1, a field effect transistor Q2, a resistor R1 and a resistor R2; the static contacts of the relay JK1 and the relay JK2 are connected correspondingly, the moving contact No. 5 of the relay JK1 is connected to the pin No. 4 of the analog quantity input interface J5; the moving contact No. 6 of the relay JK1 is connected to the pin No. 4 of the analog quantity input interface J1; the moving contact No. 7 of the relay JK1 is connected to the pin No. 3 of the analog quantity input interface J5; the moving contact No. 8 of the relay JK1 is connected to the pin No. 3 of the analog quantity input interface J1; the moving contact No. 9 of the relay JK1 is connected to the pin No. 2 of the analog quantity input interface J5; the moving contact No. 10 of the relay JK1 is connected to the pin No. 2 of the analog quantity input interface J1 pin connection; the No. 11 moving contact of the relay JK1 is connected to the No. 1 pin of the analog input interface J5; the No. 12 moving contact of the relay JK1 is connected to the No. 1 pin of the analog input interface J1; the moving contacts of the relay JK2 are respectively connected to the switch cabinet; the switch control input end of the relay JK1 is connected to the drain of the field effect tube Q1, and the gate of the field effect tube Q1 is connected to the source of the field effect tube Q1 through the resistor R1; the switch control output end of the relay JK1, the relay JK2 and the drain of the field effect tube Q2 are connected in sequence, and the gate of the field effect tube Q2 is connected to the source of the field effect tube Q2 through the resistor R2; the diode D1 is connected in parallel with the relay JK1, and the diode D2 is connected in parallel with the relay JK2; the gate of the field effect tube Q1 and the gate of the field effect tube Q2 are respectively connected to the control module.

2. A test device for automatic verification of relay protection logic of a subway power supply system as claimed in claim 1, It is characterized in that The input-output driving module includes an interface J3 and a reset module, a closing module, a circuit breaker closing position feedback module, and a circuit breaker opening position feedback module respectively connected to the interface J3, the interface J3 is connected to the switch cabinet, the input ends of the reset module and the closing module are respectively connected to the control module, the output ends of the reset module and the closing module are respectively connected to the switch cabinet, the input ends of the circuit breaker closing position feedback module and the circuit breaker opening position feedback module are connected to the switch cabinet, and the output ends of the circuit breaker closing position feedback module and the circuit breaker opening position feedback module are connected to the control module.

3. A test device for automatic verification of relay protection logic of a subway power supply system as claimed in claim 2, It is characterized in that The reset module includes an optical coupler U3, a resistor R3, a resistor R6, a resistor R9, a transistor Q33 and a diode D3; the anode of the optical coupler U3 is connected to the external power supply through the resistor R6, and the cathode of the optical coupler U3 is connected to the control module; the collector of the optical coupler U3 is connected to the interface J3 through the diode D3; the emitter of the optical coupler U3 is grounded through the resistor R9; the collector of the transistor Q33 is connected to the collector of the optical coupler U3, the emitter of the transistor Q33 is connected to the positive electrode of the diode D3 through the resistor R3, and the base of the transistor Q33 is connected to the emitter of the optical coupler U3.

4. A test device for automatic verification of relay protection logic of a subway power supply system as claimed in claim 2, It is characterized in that The closing module includes an optical coupler U6, a resistor R12, a resistor R15, a resistor R18, a transistor Q36 and a diode D6; the anode of the optical coupler U6 is connected to the external power supply through the resistor R15, and the cathode of the optical coupler U6 is connected to the control module; the collector of the optical coupler U6 is connected to the interface J3 through the diode D6; the emitter of the optical coupler U6 is grounded through the resistor R18; the collector of the transistor Q36 is connected to the collector of the optical coupler U6, the emitter of the transistor Q36 is connected to the positive electrode of the diode D6 through the resistor R12, and the base of the transistor Q36 is connected to the emitter of the optical coupler U6.

5. A test device for automatic verification of relay protection logic of a subway power supply system as claimed in claim 2, It is characterized in that The circuit breaker closing position feedback module includes an optocoupler U19, a voltage stabilizing diode D22, a resistor R55, a resistor R56, a resistor R61, a resistor R64, a resistor R65, a diode D19, a capacitor C1 and a light emitting diode D23; the emitter of the optocoupler U19 is connected to the relay protection tester, and the emitter of the optocoupler U19 is grounded through the resistor R64; the emitter of the optocoupler U19 is grounded through the resistor R65 and the light emitting diode D23; the collector of the optocoupler U19 is connected to an external power supply; the anode of the optocoupler U19, the voltage stabilizing diode D22, the resistor R56, the resistor R55, the diode D19 and the interface J3 are connected in sequence; the cathode of the optocoupler U19 is connected to the negative electrode of the voltage stabilizing diode through the capacitor C1; the resistor R61 is connected in parallel with the capacitor C1.

6. A test device for automatic verification of relay protection logic of a subway power supply system as claimed in claim 2, It is characterized in that The circuit breaker position feedback module includes an optocoupler U22, a voltage stabilizing diode D31, a resistor R70, a resistor R71, a resistor R76, a resistor R79, a resistor R80, a diode D28, a capacitor C4 and a light emitting diode D32; the emitter of the optocoupler U22 is connected to the relay protection tester, and the emitter of the optocoupler U22 is grounded through the resistor R79; the emitter of the optocoupler U22 is grounded through the resistor R80 and the light emitting diode D32; the collector of the optocoupler U22 is connected to an external power supply; the anode of the optocoupler U22, the voltage stabilizing diode D31, the resistor R71, the resistor R70, the diode D28 and the interface J3 are connected in sequence; the cathode of the optocoupler U22 is connected to the negative electrode of the voltage stabilizing diode through the capacitor C4; the resistor R76 is connected in parallel with the capacitor C4.

7. A test device for automatic verification of relay protection logic of a subway power supply system as claimed in claim 6, It is characterized in that The model used by the optical coupler U22 is TLP627-1.

8. A test device for automatic verification of relay protection logic of a subway power supply system as claimed in any one of claims 1, It is characterized in that The control module adopts an ARM core board.

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