Multi-machine automatic test system suitable for relay protection device

Abstract

The utility model provides a multi-machine automatic test system suitable for relay protection devices, which comprises a relay protection device multi-machine automatic test tool, a plurality of relay protection devices to be tested and a multi-machine automatic test background system, and is characterized in that the relay protection device multi-machine automatic test tool is coupled with the multi-machine automatic test background system in a communication manner; the relay protection device multi-machine automatic test tool is connected with the plurality of relay protection devices to be tested, and the relay protection device multi-machine automatic test tool is used for establishing communication connection with the plurality of relay protection devices to be tested in sequence and testing the relay protection devices to be tested in communication. According to the utility model, the batch test of the relay protection devices to be tested is realized, the problems of repeated wiring, tedious manual operation and the like for testing a plurality of relay protection devices to be tested in the prior art can be solved, the test cost is reduced, and the reliability of the test result and the production test efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of automatic testing technology, and in particular to a multi-machine automatic testing system suitable for relay protection devices. Background Technology

[0002] Relay protection devices are automatic devices that can detect faults or abnormal operating conditions in power system components and can trip circuit breakers and send signals in real time. To ensure safe and reliable power supply, relay protection devices are installed on major electrical equipment and lines in the power system.

[0003] Currently, the production testing of relay protection devices generally adopts single-unit testing. The output of the standard source, the input of the input quantity, and the output of the output quantity all require manual operation. When testing multiple devices, repeated wiring work and repetitive and tedious operations are required. Production testing personnel need to have certain professional skills and have a large workload, resulting in low production testing efficiency. Utility Model Content

[0004] This utility model aims to solve, at least to a certain extent, one of the technical problems in the related art.

[0005] Therefore, the purpose of this utility model is to propose an automatic testing system and method for multiple relay protection devices, which solves the problems of repetitive wiring and cumbersome manual operation in testing multiple devices.

[0006] To achieve the above objectives, the first aspect of this utility model provides a multi-machine automatic testing system suitable for relay protection devices, comprising:

[0007] The system includes a multi-machine automatic test fixture for relay protection devices, multiple relay protection devices under test, and a multi-machine automatic test background system. The multi-machine automatic test fixture for relay protection devices is communicatively coupled to the multi-machine automatic test background system. The multi-machine automatic test fixture for relay protection devices is connected to the multiple relay protection devices under test. The multi-machine automatic test fixture for relay protection devices is used to sequentially establish communication connections with the multiple relay protection devices under test and to test the relay protection devices under test during communication.

[0008] According to the utility model, the multi-machine automatic testing system for relay protection devices is configured by setting up a multi-machine automatic testing fixture for relay protection devices, multiple relay protection devices under test, and a multi-machine automatic testing backend system. Through wiring between these components, a communication connection can be established between the backend system, the multi-machine automatic testing fixture, and the multiple relay protection devices under test. Batch testing of the relay protection devices under test can be achieved by automatically switching different test channels. Therefore, the multi-machine automatic testing system for relay protection devices of this utility model not only solves the problems of repeated wiring and cumbersome manual operation required for testing multiple relay protection devices under test in existing technologies, but also reduces testing costs and improves the reliability of test results and production testing efficiency.

[0009] According to one embodiment of the present invention, a three-phase AC standard source is further included. The three-phase AC standard source is communicatively coupled to the multi-machine automatic test background system. The three-phase AC standard source is connected to the multi-machine automatic test fixture of the relay protection device and is used to output the corresponding current and voltage quantities to the multi-machine automatic test fixture of the relay protection device after receiving the current and voltage output command issued by the multi-machine automatic test background system.

[0010] According to one embodiment of the present invention, the multi-machine automatic test fixture for relay protection devices includes a serial communication detection module, the relay protection device under test includes an RS485 communication module, the serial communication detection module is connected to the multi-machine automatic test background system via a serial port, and the serial communication detection module is connected to the RS485 communication module via a serial port.

[0011] According to one embodiment of the present invention, the multi-machine automatic testing fixture for relay protection devices includes an input quantity detection module, the relay protection device under test includes an input quantity input module, and the input quantity detection module is connected to the input quantity input module.

[0012] According to one embodiment of the present invention, the multi-machine automatic testing fixture for relay protection devices includes a current and voltage detection module, the relay protection device under test includes a current and voltage acquisition module, and the current and voltage detection module is connected to the current and voltage acquisition module.

[0013] According to one embodiment of the present invention, the multi-machine automatic testing fixture for relay protection devices includes an output detection module, the relay protection device under test includes an output input module, and the output detection module is connected to the output input module.

[0014] According to one embodiment of the present invention, an external AC / DC power supply is also included. The multi-machine automatic test fixture for the relay protection device includes a power detection module. The relay protection device under test includes a power input module. The input terminal of the power detection module is connected to the external AC / DC power supply, and the output terminal of the power detection module is connected to the power input module.

[0015] According to one embodiment of the present invention, it further includes multiple card plates, the number of which is not less than the number of the relay protection devices under test, and the card plates are respectively connected to the multi-machine automatic testing fixture for relay protection devices and the multiple relay protection devices under test.

[0016] According to one embodiment of the present invention, the card plate is provided with a connection device adapted to the shape of the back plate of the relay protection device under test. One side of the connection device is connected to the multi-machine automatic testing fixture of the relay protection device, and the other side of the connection device is connected to the back of the relay protection device under test.

[0017] The second aspect of this utility model provides a multi-machine automatic testing method for relay protection devices, which is performed using the multi-machine automatic testing device for relay protection devices described in the first aspect of this utility model. The testing method includes:

[0018] S102 supplies power to the multi-machine automatic test fixture and three-phase AC standard source for relay protection devices, and runs the multi-machine automatic test background system.

[0019] S104, attach N card plates to the backplate positions of N relay protection devices under test respectively, and supply power to N relay protection devices under test, where N is a positive integer;

[0020] S106, the multi-machine automatic test background system automatically sets the serial communication addresses of N relay protection devices under test and establishes communication connections;

[0021] S108, Perform input quantity test. The multi-machine automatic test background system sequentially sends closing commands to the output relays of the input quantity detection modules of the first to Nth machines, and sends closing and return commands to the switching relays of the input quantity input modules. Observe the input quantity display status of the corresponding relay protection device under test on the multi-machine automatic test background system until all input quantity input modules have been tested.

[0022] S110, Perform output quantity test. The multi-machine automatic test background system sequentially sends closing commands to the switching relays of the output quantity detection modules of the first to Nth units, and sends closing and return commands to the output relays of the output quantity output modules. Observe the output quantity display status of the corresponding relay protection device under test on the multi-machine automatic test background system until all output quantity input modules have been tested.

[0023] S112, perform automatic current and voltage sampling correction. The multi-machine automatic test background system automatically sends current and voltage output control commands to the three-phase AC standard source, and sequentially sends current and voltage sampling correction commands to the 1st to Nth relay protection devices under test to complete the current and voltage sampling correction of the relay protection devices under test.

[0024] S114 performs automatic current and voltage sampling and meter reading. The multi-machine automatic test background system automatically sends current and voltage output control commands to the three-phase AC standard source and reads the measurement data of the first to Nth relay protection devices under test in sequence to complete the automatic current and voltage meter reading of the relay protection devices under test.

[0025] S116 After each test task is completed, the multi-machine automatic test background system automatically displays the test results and automatically saves all test data and test results to the test report, and disconnects the power to the multi-machine automatic test fixture for relay protection devices and the relay protection device under test.

[0026] S118, Replace a batch of relay protection devices under test, and repeat steps S102 to S116 to complete the testing of this batch of relay protection devices under test.

[0027] According to the present invention, an automatic multi-machine testing method for relay protection devices enables batch testing of relay protection devices under test by automatically switching different test channels. Therefore, the present invention not only solves the problems of repeated wiring and cumbersome manual operation required for testing multiple relay protection devices in the prior art, but also reduces testing costs and improves the reliability of test results and production testing efficiency.

[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0030] Figure 1 This is a schematic diagram of the structure of a multi-machine automatic testing system for relay protection devices proposed in an embodiment of this utility model.

[0031] Figure 2 This is a schematic diagram of the structure of a multi-machine automatic testing method for relay protection devices proposed in an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10-Multi-machine automatic test fixture for relay protection devices; 11-Serial communication detection module; 12-Input detection module; 13-Current and voltage detection module; 14-Output detection module; 15-Power supply detection module; 20-Relay protection device under test; 21-RS485 communication module; 22-Input module; 23-Current and voltage acquisition module; 24-Output module; 25-Power supply input module; 30-Multi-machine automatic test background system; 40-Three-phase AC standard source; 50-External AC / DC power supply. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Rather, the embodiments of this utility model include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0035] Figure 1 This is a schematic diagram of the structure of a multi-machine automatic testing system for relay protection devices proposed in an embodiment of this utility model.

[0036] See Figure 1 An automatic multi-machine testing system for relay protection devices includes an automatic multi-machine testing fixture 10, multiple relay protection devices 20 under test, and an automatic multi-machine testing backend system 30. The automatic multi-machine testing fixture 10 and the automatic multi-machine testing backend system 30 are communicatively coupled. The automatic multi-machine testing fixture 10 is connected to the multiple relay protection devices 20 under test. The automatic multi-machine testing fixture 10 is used to establish communication connections with the multiple relay protection devices 20 under test sequentially and to test the relay protection devices 20 under test during communication.

[0037] The multi-machine automatic test fixture 10 for relay protection devices is a device for simultaneously testing multiple relay protection devices. The relay protection devices monitor electrical parameters of the power system (such as voltage, current, frequency, etc.) and take rapid measures when an anomaly is detected. The multi-machine automatic test fixture 10 supports multi-channel input / output and can simultaneously connect multiple relay protection devices 20 under test.

[0038] The multi-machine automatic test background system 30 includes a computer, which can display the status of the input and output of each relay protection device 20 under test. The multi-machine automatic test background system 30 can be connected to each other using various hardware interfaces; there are no restrictions on this. In one example, the multi-machine automatic test background system 30 is connected to each other via a serial port, which is cost-effective.

[0039] The multi-machine automatic testing system for relay protection devices according to the present invention, by setting up a multi-machine automatic testing fixture for relay protection devices, multiple relay protection devices under test, and a multi-machine automatic testing backend system, communication connections can be established between the backend system, the multi-machine automatic testing fixture, and the multiple relay protection devices under test through wiring. Batch testing of the relay protection devices under test can be achieved by automatically switching different test channels. Therefore, the multi-machine automatic testing system for relay protection devices according to the present invention not only solves the problems of repeated wiring and cumbersome manual operation required for testing multiple relay protection devices under test in the prior art, but also reduces testing costs and improves the reliability of test results and production testing efficiency.

[0040] In some embodiments, the multi-machine automatic testing system for relay protection devices further includes a three-phase AC standard source 40. The three-phase AC standard source 40 is communicatively coupled to the multi-machine automatic testing backend system 30 and connected to the multi-machine automatic testing fixture 10. Upon receiving a current and voltage output command from the multi-machine automatic testing backend system 30, the three-phase AC standard source 40 outputs a corresponding current and voltage value to the multi-machine automatic testing fixture 10. The three-phase AC standard source 40 and the multi-machine automatic testing fixture 10 can be connected using various hardware interfaces, and there is no limitation on this. In one example, the three-phase AC standard source 40 and the multi-machine automatic testing fixture 10 are connected via a serial port, which is cost-effective.

[0041] like Figure 1 As shown, the multi-machine automatic test fixture 10 for relay protection devices includes a serial communication detection module 11, and the relay protection device under test 20 includes an RS485 communication module 21. The serial communication detection module 11 is connected to the multi-machine automatic test background system 30 via a serial port, and the serial communication detection module 11 and the RS485 communication module 21 are connected via a serial port to achieve communicative coupling. In one example, the serial communication detection module 11 is connected to the serial port of the computer in the multi-machine automatic test background system 30 to realize data transmission and control command sending and receiving.

[0042] This invention relates to a multi-machine automatic testing system for relay protection devices. The multi-machine automatic testing fixture 10 includes an input quantity detection module 12, and the relay protection device under test 20 includes an input quantity input module 22. The input quantity detection module 12 is connected to the input quantity input module 22. The input quantity detection module 12 is used to detect the switching state of the input quantity input module 22. In one example, the input quantity detection module 12 includes an output relay corresponding one-to-one with the input quantities of multiple relay protection devices under test 20 and a multi-channel input quantity module switching relay. The multi-machine automatic testing backend system 30 controls the output relays of the input quantity detection module 12 and the Nth input quantity module switching relay to the closed position, where N is a positive integer. When the input quantity input corresponding to the Nth relay protection device under test 20 is set, the corresponding input quantity display status in the multi-machine automatic testing backend system 30 changes from green to red, providing a clear visual display of the input quantity status. This reduces the cumbersome manual input of input quantities in existing technologies and improves operational convenience.

[0043] This invention relates to an automatic multi-machine testing system for relay protection devices. The automatic multi-machine testing fixture 10 includes a current and voltage detection module 13, and the relay protection device under test 20 includes a current and voltage acquisition module 23. The current and voltage detection module 13 is connected to the current and voltage acquisition module 23. The input terminal of the current and voltage detection module 13 is connected to the output terminal of a three-phase AC standard source 40, simultaneously providing 85V to 265V AC or DC voltage to the automatic multi-machine testing fixture 10 and the N relay protection devices under test 20.

[0044] The multi-machine automatic testing fixture 10 for relay protection devices includes an output quantity detection module 14, and the relay protection device under test 20 includes an output quantity output module 24. The output quantity detection module 14 is connected to the output quantity output module 24. The output quantity detection module 14 is used to detect the switching state of the output quantity output module 24. In one example, the output quantity detection module 14 includes switch quantity inputs corresponding one-to-one with the output quantities of N relay protection devices under test 20 and N output quantity module switching relays. When the multi-machine automatic testing background system 30 controls the closing of the Nth output quantity module switching relay of the output quantity detection module 14 and the closing of the output quantity of the Nth relay protection device under test 20, the switch quantity input of the output quantity detection module 14 is set, and the corresponding output quantity display status of the multi-machine automatic testing background system 30 changes from green to red, which can intuitively display the status of the output quantity. This reduces the cumbersome operation of manual input of output quantities in the prior art and improves the convenience of operation.

[0045] In some embodiments, the multi-machine automatic testing system for relay protection devices further includes an external AC / DC power supply 50. The multi-machine automatic testing fixture 10 for relay protection devices includes a power detection module 15, and the relay protection device under test 20 includes a power input module 25. The input terminal of the power detection module 15 is connected to the external AC / DC power supply 50, and the output terminal of the power detection module 15 is connected to the power input module 25. The external AC / DC power supply 50 can output both DC and AC voltages.

[0046] The multi-machine automatic testing system for relay protection devices also includes multiple card plates, the number of which is not less than the number of relay protection devices 20 under test. The card plates are connected to the multi-machine automatic testing fixture 10 and the multiple relay protection devices 20 under test, respectively. In one example, the card plate is equipped with a connection device adapted to the shape of the backplate of the relay protection device 20. One side of the connection device is connected to the multi-machine automatic testing fixture 10, and the other side is connected to the back of the relay protection device 20. The connection device is equipped with connection terminals and / or pins to achieve connection with the multi-machine automatic testing fixture 10 and the multiple relay protection devices 20 under test, offering the advantage of convenient wiring. Additionally, the back of the relay protection device 20 under test is also equipped with connection terminals and / or pins adapted to the connection device.

[0047] The multi-machine automatic test background system 30 adopts dedicated background test software corresponding to the multi-machine automatic test fixture 10 and the N relay protection devices under test 20. It is connected to the multi-machine automatic test fixture 10 and the N relay protection devices under test 20 via serial ports, receives the real-time status and measurement data of the multi-machine automatic test fixture 10 and the N relay protection devices under test 20, and sends instructions such as reading data, remote control output, and automatic calibration to the multi-machine automatic test fixture 10 and the N relay protection devices under test 20. At the same time, the multi-machine automatic test background system 30 is connected to the three-phase AC standard source 40 via another serial port. According to the current and voltage requirements of the relay protection device under test 20, it edits the current and voltage output value configuration file and sends current and voltage output control commands to the three-phase AC standard source 40 according to the current and voltage output values ​​in the configuration file.

[0048] Figure 2 This is a schematic diagram of the structure of a multi-machine automatic testing method for relay protection devices proposed in an embodiment of this utility model. Combined with... Figure 1 , Figure 2 As shown in the figure, this utility model embodiment also proposes a multi-machine automatic testing method for relay protection devices, which is completed using the multi-machine automatic testing device for relay protection devices described in the above utility model embodiment. The testing method includes the following steps:

[0049] S102 supplies power to the multi-machine automatic test fixture 10 and the three-phase AC standard source 40 for relay protection devices, and runs the multi-machine automatic test background system 30.

[0050] In this embodiment, the multi-machine automatic testing background system 30 includes a computer. The multi-machine automatic testing fixture 10 for relay protection devices is connected to the computer via a serial port, and the three-phase AC standard source 40 is connected to the computer via a USB serial port.

[0051] S104, attach N card plates to the backplate positions of N relay protection devices 20 under test respectively, and supply power to the N relay protection devices 20 under test, where N is a positive integer.

[0052] In this embodiment, N relay protection devices 20 to be tested are placed on the fixed slots of the multi-machine automatic test fixture 10 for relay protection devices. N card plates are respectively attached to the back plate positions of the N relay protection devices 20 to be tested. The power switch on the multi-machine automatic test fixture 10 is turned on to supply power to the N relay protection devices 20 to be tested.

[0053] S106, the multi-machine automatic test background system 30 automatically sets the serial communication addresses of N relay protection devices 20 under test and establishes communication connections.

[0054] In this embodiment, when the communication connection button of the multi-machine automatic test background system 30 is clicked, the multi-machine automatic test background system 30 automatically sets the serial port communication address of N relay protection devices 20 under test through broadcast and establishes a communication connection.

[0055] S108, Perform input quantity test. The multi-machine automatic test background system 30 sequentially sends closing commands to the output relays of the input quantity detection module 12 of the first to Nth devices, and sends closing and return commands to the switching relays of the input quantity input module 22. Observe the input quantity display status of the corresponding relay protection device 20 under test on the multi-machine automatic test background system 30 until all input quantity input modules 22 have been tested.

[0056] In this embodiment, the input modules 22 of the relay protection device under test 20 are tested one by one. The input status can be observed through the computer of the multi-machine automatic test background system 30, and the color change of the input status is set according to actual needs. For example, the input status can change from green to red, or from red to green, thus indicating a change in the status of the input. When the last relay protection device under test 20 is tested, the multi-machine automatic test background system 30 sends a return command to the output relay of the input detection module 12. This reduces the cumbersome operation of manual input of inputs in the prior art and improves the convenience of operation.

[0057] S110, Perform output quantity test. The multi-machine automatic test background system 30 sequentially sends closing commands to the switching relays of the output quantity detection module 14 of the first to Nth devices, and sends closing and return commands to the output relays of the output quantity output module 24. Observe the output quantity display status of the corresponding relay protection device 20 under test on the multi-machine automatic test background system 30 until all output quantity output modules 24 have been tested.

[0058] In this embodiment, the output module 24 of the relay protection device under test 20 is tested one by one. The output status can be displayed by observing the computer of the multi-machine automatic testing background system 30, and the color change of the output status display is set according to actual needs. For example, the output status display can change from green to red, or from red to green, thus indicating the status change of the output. This reduces the cumbersome operation of manual input of output in the prior art and improves the convenience of operation.

[0059] S112, perform automatic current and voltage sampling correction. The multi-machine automatic test background system 30 automatically sends current and voltage output control commands to the three-phase AC standard source 40, and sequentially sends current and voltage sampling correction commands to the first to Nth relay protection devices 20 under test to complete the current and voltage sampling correction of the relay protection devices 20 under test.

[0060] In this embodiment, the multi-machine automatic test background system 30 automatically sends current and voltage output control commands to the three-phase AC standard source 40, which can avoid the repetitive and tedious manual output of the standard source and improve the convenience of operation.

[0061] S114, perform automatic current and voltage sampling and meter reading. The multi-machine automatic test background system 30 automatically sends current and voltage output control commands to the three-phase AC standard source 40, and sequentially reads the measurement data of the first to Nth relay protection devices 20 under test to complete the automatic current and voltage meter reading of the relay protection devices 20 under test.

[0062] S116 After each test task is completed, the multi-machine automatic test background system 30 automatically displays the test results and automatically saves the test data and test results to the test report, and disconnects the power to the multi-machine automatic test fixture 10 and the relay protection device under test 20.

[0063] In this embodiment, the test report can display the pass or fail results for each test data point. The test data and results are ultimately stored in the computer of the multi-machine automated testing backend system 30 for easy retrieval later.

[0064] S118, Replace a batch of relay protection devices 20 under test, and repeat steps S102 to S116 to complete the testing of this batch of relay protection devices 20 under test.

[0065] In summary, the automatic multi-machine testing method for relay protection devices according to the embodiments of this utility model achieves at least the following technical effects: This testing method realizes batch testing of relay protection devices under test by automatically switching different test channels. It can be seen that the automatic multi-machine testing method for relay protection devices of this utility model can not only solve the problems of repeated wiring and cumbersome manual operation required for testing multiple relay protection devices under test in the prior art, but also reduce testing costs and improve the reliability of test results and production testing efficiency.

[0066] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0067] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0068] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0069] In the description of this utility model, the terms "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0070] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A multi-machine automatic testing system for relay protection devices, characterized in that, include: The system includes a multi-machine automatic test fixture (10) for relay protection devices, multiple relay protection devices under test (20), and a multi-machine automatic test background system (30). The multi-machine automatic test fixture (10) and the multi-machine automatic test background system (30) are communicatively coupled. The multi-machine automatic test fixture (10) is connected to multiple relay protection devices under test (20). The multi-machine automatic test fixture (10) is used to establish communication connections with multiple relay protection devices under test (20) in sequence and to test the relay protection devices under test (20) in communication.

2. The multi-machine automatic testing system for relay protection devices according to claim 1, characterized in that, It also includes a three-phase AC standard source (40), which is communicatively coupled to the multi-machine automatic test background system (30). The three-phase AC standard source (40) is connected to the multi-machine automatic test fixture (10) of the relay protection device, and is used to output the corresponding current and voltage to the multi-machine automatic test fixture (10) of the relay protection device after receiving the current and voltage output command issued by the multi-machine automatic test background system (30).

3. The multi-machine automatic testing system for relay protection devices according to claim 1, characterized in that, The multi-machine automatic test fixture (10) for the relay protection device includes a serial communication detection module (11), and the relay protection device under test (20) includes an RS485 communication module (21). The serial communication detection module (11) is connected to the multi-machine automatic test background system (30) via a serial port, and the serial communication detection module (11) is connected to the RS485 communication module (21) via a serial port.

4. The multi-machine automatic testing system for relay protection devices according to claim 3, characterized in that, The multi-machine automatic test fixture (10) for relay protection devices includes an input detection module (12), and the relay protection device under test (20) includes an input module (22). The input detection module (12) is connected to the input module (22).

5. The multi-machine automatic testing system for relay protection devices according to claim 3, characterized in that, The multi-machine automatic testing fixture (10) for relay protection devices includes a current and voltage detection module (13), and the relay protection device under test (20) includes a current and voltage acquisition module (23). The current and voltage detection module (13) is connected to the current and voltage acquisition module (23).

6. The multi-machine automatic testing system for relay protection devices according to claim 4, characterized in that, The multi-machine automatic test fixture (10) for the relay protection device includes an output detection module (14), and the relay protection device under test (20) includes an output input module (24). The output detection module (14) is connected to the output input module (24).

7. The multi-machine automatic testing system for relay protection devices according to claim 3, characterized in that, It also includes an external AC / DC power supply (50), the multi-machine automatic test fixture (10) for the relay protection device includes a power detection module (15), the relay protection device under test (20) includes a power input module (25), the input terminal of the power detection module (15) is connected to the external AC / DC power supply (50), and the output terminal of the power detection module (15) is connected to the power input module (25).

8. The multi-machine automatic testing system for relay protection devices according to claim 1, characterized in that, It also includes multiple card plates, the number of which is not less than the number of the relay protection device under test (20), and the card plates are respectively connected to the relay protection device multi-machine automatic test fixture (10) and the multiple relay protection devices under test (20).

9. The multi-machine automatic testing system for relay protection devices according to claim 8, characterized in that, The card plate is provided with a connection device adapted to the shape of the back plate of the relay protection device (20) under test. One side of the connection device is connected to the multi-machine automatic test fixture (10) of the relay protection device, and the other side of the connection device is connected to the back of the relay protection device (20) under test.

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