Multi-machine automatic test system and method suitable for relay protection device

Abstract

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

Description

Technical Field

[0001] The present invention relates to the field of automatic testing technology, and in particular to a multi-machine automatic testing system and method suitable for relay protection devices. Background Art

[0002] Relay protection device refers to an automatic device that can respond to the failure or abnormal operation of power components in the power system, and can act in real time to trip the circuit breaker and send a signal. In order to ensure safe and reliable power supply, relay protection devices are installed on the main electrical equipment and lines in the power system.

[0003] At present, the whole machine production test of relay protection devices generally adopts single-unit testing, and the output of standard sources, input of input quantities, output of output quantities, etc. need to be manually operated. When testing multiple devices, repeated wiring work and repeated tedious operations are required. Production testers need to have certain professional skills and the workload is large, and the production test efficiency is low. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the purpose of the present invention is to propose a multi-machine automatic testing system and method suitable for relay protection devices, so as to solve the problems of repeated wiring and cumbersome manual operations in testing multiple devices.

[0006] To achieve the above object, the present invention provides a first aspect of a multi-machine automatic test system suitable for relay protection devices, comprising:

[0007] A multi-machine automatic test tool for a relay protection device, multiple relay protection devices to be tested and a multi-machine automatic test background system, wherein the multi-machine automatic test tool for a relay protection device is communicatively coupled to the multi-machine automatic test background system, the multi-machine automatic test tool for a relay protection device is connected to the multiple relay protection devices to be tested, and the multi-machine automatic test tool for a relay protection device is used to sequentially establish communication connections with the multiple relay protection devices to be tested and to test the relay protection devices to be tested in communication.

[0008] According to the invention, the multi-machine automatic test system for relay protection devices is applicable to a plurality of relay protection devices to be tested and a multi-machine automatic test background system. By setting a multi-machine automatic test tool for relay protection devices, a plurality of relay protection devices to be tested and a multi-machine automatic test background system, a communication connection between the multi-machine automatic test background system, the multi-machine automatic test tool for relay protection devices and the plurality of relay protection devices to be tested can be established through wiring therebetween, and batch testing of the relay protection devices to be tested can be achieved by automatically switching different test channels. It can be seen that the multi-machine automatic test system for relay protection devices of the invention can not only solve the problems of repeated wiring and cumbersome manual operation required for testing a plurality of relay protection devices to be tested in the prior art, but also reduce the test cost, improve the reliability of the test results and the production test efficiency.

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

[0010] According to one embodiment of the present invention, the relay protection device multi-machine automatic testing tooling includes a serial communication detection module, the relay protection device to be tested includes an RS485 communication module, the serial communication detection module is connected to the multi-machine automatic testing 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 relay protection device multi-machine automatic test tool includes a binary input detection module, the relay protection device to be tested includes a binary input input module, and the binary input detection module is connected to the binary input input module.

[0012] According to one embodiment of the present invention, the relay protection device multi-machine automatic test tool includes a current and voltage detection module, the relay protection device to be tested 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 relay protection device multi-machine automatic test tool includes an output quantity detection module, the relay protection device to be tested includes an output quantity input module, and the output quantity detection module is connected to the output quantity input module.

[0014] According to one embodiment of the present invention, it also includes an external AC / DC power supply, the relay protection device multi-machine automatic testing tool includes a power detection module, the relay protection device to be tested includes a power input module, the input end of the power detection module is connected to the external AC / DC power supply, and the output end of the power detection module is connected to the power input module.

[0015] According to one embodiment of the present invention, it further includes a plurality of pallet boards, the number of the pallet boards is not less than the number of the relay protection devices to be tested, and the pallet boards are respectively connected to the relay protection device multi-machine automatic test tooling and the plurality of the relay protection devices to be tested.

[0016] According to one embodiment of the present invention, a connecting device adapted to the shape of the back plate of the relay protection device to be tested is provided on the card board, one side of the connecting device is connected to the multi-machine automatic testing tooling of the relay protection device, and the other side of the connecting device is connected to the back of the relay protection device to be tested.

[0017] The second aspect of the present invention provides a multi-machine automatic testing method applicable to a relay protection device, which is completed by using the multi-machine automatic testing device for relay protection devices described in the first aspect of the present invention. The testing method comprises:

[0018] S102, supply power to the relay protection device multi-machine automatic test tooling and the three-phase AC standard source, and run the multi-machine automatic test background system;

[0019] S104, respectively clamping N card boards to the backplane positions of N relay protection devices to be tested, and supplying power to the N relay protection devices to be tested, wherein N is a positive integer;

[0020] S106, the multi-machine automatic test background system automatically sets the serial port communication addresses of the N relay protection devices to be tested and establishes a communication connection;

[0021] S108, perform binary input test, the multi-machine automatic test background system sends closing instructions to the output relays of the binary input detection modules of the first to the Nth units in sequence, sends closing and return instructions to the switching relays of the binary input input modules, and observes the binary input display status of the corresponding relay protection device to be tested on the multi-machine automatic test background system until all binary input input modules are tested;

[0022] S110, conduct output quantity test, the multi-machine automatic test background system sends closing instructions to the switching relays of the output quantity detection modules of the 1st to the Nth units in sequence, sends closing and return instructions to the output relays of the output quantity output module, and observes the output quantity display status of the corresponding relay protection device to be tested on the multi-machine automatic test background system until all output quantity input modules are tested;

[0023] S112, perform automatic calibration of current and voltage sampling, the multi-machine automatic test background system automatically sends current and voltage output control instructions to the three-phase AC standard source, and sends current and voltage sampling calibration instructions to the first to Nth relay protection devices to be tested in turn, so as to complete the current and voltage sampling calibration of the relay protection devices to be tested;

[0024] S114, automatic meter reading of current and voltage sampling is performed, and the multi-machine automatic test background system automatically sends current and voltage output control instructions to the three-phase AC standard source, and sequentially reads the measurement data of the first to Nth relay protection devices to be tested, so as to complete the automatic meter reading of current and voltage of the relay protection devices to be tested;

[0025] S116, after each test task is completed, the multi-machine automatic test background system automatically displays the test results, and automatically saves each test data and test results into the test report, and the relay protection device multi-machine automatic test tooling and the relay protection device to be tested are powered off;

[0026] S118, replacing a batch of relay protection devices to be tested, and repeating steps S102 to S116 to complete the test of this batch of relay protection devices to be tested.

[0027] According to the multi-machine automatic testing method applicable to relay protection devices of the present invention, batch testing of relay protection devices to be tested is achieved by automatically switching different test channels. It can be seen that the multi-machine automatic testing method applicable to relay protection devices of the present invention can not only solve the problems of repeated wiring and cumbersome manual operations required for testing multiple relay protection devices to be tested in the prior art, but also reduce the testing cost, improve the reliability of the test results and the production test efficiency.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

[0030] Figure 1 It is a structural schematic diagram of a multi-machine automatic testing system for relay protection devices proposed in one embodiment of the present invention.

[0031] Figure 2 It is a structural schematic diagram of a multi-machine automatic testing method for relay protection devices proposed in one embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 10-Multi-machine automatic test tooling for relay protection device, 11-serial communication detection module, 12-digital input detection module, 13-current and voltage detection module, 14-digital output detection module, 15-power supply detection module, 20-relay protection device to be tested, 21-RS485 communication module, 22-digital input module, 23-current and voltage acquisition module, 24-digital output module, 25-power supply input module, 30-multi-machine automatic test background system, 40-three-phase AC standard source, 50-external AC and DC power supply. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limitations of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0035] Figure 1 It is a structural schematic diagram of a multi-machine automatic testing system for relay protection devices proposed in one embodiment of the present invention.

[0036] See also Figure 1 A multi-machine automatic test system for a relay protection device includes a multi-machine automatic test tool 10 for a relay protection device, a plurality of relay protection devices 20 to be tested, and a multi-machine automatic test background system 30. The multi-machine automatic test tool 10 for a relay protection device is communicatively coupled to the multi-machine automatic test background system 30. The multi-machine automatic test tool 10 for a relay protection device is connected to the plurality of relay protection devices 20 to be tested. The multi-machine automatic test tool 10 for a relay protection device is used to sequentially establish communication connections with the plurality of relay protection devices 20 to be tested and to test the relay protection devices 20 to be tested in communication.

[0037] The relay protection device multi-machine automatic test tool 10 is a device for testing multiple relay protection devices simultaneously. The relay protection device monitors the electrical parameters of the power system (such as voltage, current, frequency, etc.) and takes prompt measures when an abnormality is detected. The relay protection device multi-machine automatic test tool 10 supports multi-channel input and output and can simultaneously connect multiple relay protection devices 20 to be tested.

[0038] The multi-machine automatic test background system 30 includes a computer, and the multi-machine automatic test background system 30 can display the status of the input and output quantities of each relay protection device 20 to be tested. The multi-machine automatic test background system 30 and the multi-machine automatic test background system 30 can be connected in a variety of hardware interface forms, and there is no limitation on this. In one example, the multi-machine automatic test background system 30 and the multi-machine automatic test background system 30 are connected by serial ports, which is relatively low in cost.

[0039] According to the multi-machine automatic test system applicable to relay protection devices of the embodiment of the invention, by setting a multi-machine automatic test tool for relay protection devices, multiple relay protection devices to be tested and a multi-machine automatic test background system, a communication connection between the multi-machine automatic test background system, the multi-machine automatic test tool for relay protection devices and the multiple relay protection devices to be tested can be established through wiring therebetween, and batch testing of the relay protection devices to be tested can be achieved by automatically switching different test channels. It can be seen that the multi-machine automatic test system applicable to relay protection devices of the embodiment of the invention can not only solve the problems of repeated wiring and cumbersome manual operations required for testing multiple relay protection devices to be tested in the prior art, but also reduce the testing cost, improve the reliability of the test results and the production test efficiency.

[0040] In some embodiments, the multi-machine automatic test system for relay protection devices also includes a three-phase AC standard source 40, which is communicatively coupled to the multi-machine automatic test background system 30, and the three-phase AC standard source 40 is connected to the multi-machine automatic test tool 10 of the relay protection device, and is used to output the corresponding current and voltage to the multi-machine automatic test tool 10 of the relay protection device after receiving the current and voltage output instructions issued by the multi-machine automatic test background system 30. The three-phase AC standard source 40 and the multi-machine automatic test tool 10 of the relay protection device can be connected in a variety of hardware interface forms, and there is no limitation on this. In one example, the three-phase AC standard source 40 and the multi-machine automatic test tool 10 of the relay protection device are connected by a serial port, which is relatively low in cost.

[0041] like Figure 1 As shown, the relay protection device multi-machine automatic test tool 10 includes a serial communication detection module 11, the relay protection device to be tested 20 includes an RS485 communication module 21, the serial communication detection module 11 is connected to the multi-machine automatic test background system 30 through a serial port, and the serial communication detection module 11 and the RS485 communication module 21 are connected to achieve communicative coupling through the serial port connection. In one example, the serial communication detection module 11 is connected to the serial port of the computer of the multi-machine automatic test background system 30 to realize data transmission and the sending and receiving of control instructions.

[0042] Applicable to the relay protection device multi-machine automatic test system, the relay protection device multi-machine automatic test tool 10 includes a binary input detection module 12, the relay protection device to be tested 20 includes a binary input input module 22, and the binary input detection module 12 is connected to the binary input input module 22. The binary input detection module 12 is used to detect the switch state of the binary input input module 22. In one example, the binary input detection module 12 includes an output relay corresponding to the binary inputs of multiple relay protection devices 20 to be tested and a multi-channel binary input module switching relay, and the multi-machine automatic test background system 30 controls the output relay of the binary input detection module 12 and the N-th binary input module switching relay to the closed position, wherein N is a positive integer, and the binary input corresponding to the N-th relay protection device to be tested 20 is set, and the binary input display state corresponding to the multi-machine automatic test background system 30 changes from green to red, which can intuitively display the state of the binary input. As a result, the cumbersome operation of manually inputting the binary input in the prior art is reduced, and the convenience of operation is improved.

[0043] Applicable to a relay protection device multi-machine automatic test system, the relay protection device multi-machine automatic test tool 10 includes a current and voltage detection module 13, and the relay protection device 20 to be tested includes a current and voltage acquisition module 23, and the current and voltage detection module 13 is connected to the current and voltage acquisition module 23. The input end of the current and voltage detection module 13 is connected to the output end of the three-phase AC standard source 40, and at the same time, an AC or DC voltage of 85V to 265V is provided to the relay protection device multi-machine automatic test tool 10 and N relay protection devices 20 to be tested.

[0044] The multi-machine automatic test tool 10 of the relay protection device includes an output quantity detection module 14, and the relay protection device 20 to be tested includes an output quantity output module 24, and 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 switch state of the output quantity output module 24. In one example, the output quantity detection module 14 includes a switch quantity input corresponding to the output quantities of N relay protection devices 20 to be tested and an N-way output quantity module switching relay. After the N-way output quantity module switching relay of the output quantity detection module 14 is closed and the output quantity of the N-th relay protection device 20 to be tested is closed by the multi-machine automatic test background system 30, the switch quantity input of the output quantity detection module 14 is set, and the corresponding output quantity display state of the multi-machine automatic test background system 30 changes from green to red, which can intuitively display the state of the output quantity. As a result, the cumbersome operation of manually inputting the output quantity in the prior art is reduced, and the convenience of operation is improved.

[0045] In some embodiments, the multi-machine automatic test system for relay protection devices further includes an external AC / DC power supply 50, the multi-machine automatic test tool 10 for relay protection devices includes a power detection module 15, and the relay protection device 20 to be tested includes a power input module 25. The input end of the power detection module 15 is connected to the external AC / DC power supply 50, and the output end 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 voltage and AC voltage.

[0046] The multi-machine automatic test system for relay protection devices also includes multiple card boards, the number of which is not less than the number of relay protection devices 20 to be tested, and the card boards are respectively connected to the multi-machine automatic test fixture 10 for relay protection devices and the multiple relay protection devices 20 to be tested. In one example, a connection device adapted to the shape of the back plate of the relay protection device 20 to be tested is provided on the card board, one side of the connection device is connected to the multi-machine automatic test fixture 10 for relay protection devices, and the other side of the connection device is connected to the back of the relay protection device 20 to be tested. The connection device is provided with connection terminals and / or ejector pins to achieve connection with the multi-machine automatic test fixture 10 for relay protection devices and the multiple relay protection devices 20 to be tested, which has the advantage of convenient wiring. In addition, the back of the relay protection device 20 to be tested is also provided with connection terminals and / or ejector pins adapted to the connection device.

[0047] The multi-machine automatic test background system 30 adopts special background test software corresponding to the multi-machine automatic test tool 10 of the relay protection device and the relay protection device 20 to be tested, and is connected to the multi-machine automatic test tool 10 of the relay protection device and N relay protection devices 20 to be tested through the serial port, receives the real-time status and measurement data of the multi-machine automatic test tool 10 of the relay protection device and the N relay protection devices 20 to be tested, and sends instructions such as reading data, output quantity remote control, and automatic correction to the multi-machine automatic test tool 10 of the relay protection device and the N relay protection devices 20 to be tested; the multi-machine automatic test background system 30 is simultaneously connected to the three-phase AC standard source 40 through another serial port, edits the current and voltage output value configuration file according to the current and voltage requirements of the relay protection device 20 to be tested, and sends current and voltage output control instructions to the three-phase AC standard source 40 according to the current and voltage output values ​​in the configuration file.

[0048] Figure 2 1 is a schematic diagram of the structure of a multi-machine automatic testing method for a relay protection device according to an embodiment of the present invention. Figure 1 , Figure 2 As shown, the embodiment of the present invention also proposes a multi-machine automatic testing method applicable to a relay protection device, which is completed using the multi-machine automatic testing device for relay protection devices of the above-mentioned embodiment of the invention. The testing method includes the following steps:

[0049] S102 , supply power to the relay protection device multi-machine automatic test tool 10 and the three-phase AC standard source 40 , and run the multi-machine automatic test background system 30 .

[0050] In this embodiment, the multi-machine automatic test background system 30 has a computer. The relay protection device multi-machine automatic test tool 10 is connected to the computer through a serial port, and the three-phase AC standard source 40 is connected to the computer through a U serial port.

[0051] S104 , respectively clamp N card boards to the backplane positions of N relay protection devices 20 to be tested, and supply power to the N relay protection devices 20 to be tested, wherein N is a positive integer.

[0052] In this embodiment, N relay protection devices 20 to be tested are placed on the fixed card position of the relay protection device multi-machine automatic testing tool 10, and N card plates are respectively inserted into the back plate position of the N relay protection devices 20 to be tested, and the power switch on the relay protection device multi-machine automatic testing tool 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 port communication addresses of the N relay protection devices 20 to be tested and establishes a communication connection.

[0054] In this embodiment, by clicking the communication connection button of the multi-machine automatic test background system 30, the multi-machine automatic test background system 30 automatically sets the serial port communication addresses of the N relay protection devices 20 to be tested through broadcasting to establish a communication connection.

[0055] S108, perform a binary input test, the multi-machine automatic test background system 30 sends closing instructions to the output relays of the binary input detection module 12 of the 1st to the Nth units in sequence, sends closing and return instructions to the switching relays of the binary input input module 22, and observes the binary input display status of the corresponding relay protection device 20 to be tested on the multi-machine automatic test background system 30 until the test of all binary input input modules 22 is completed.

[0056] In this embodiment, the binary input quantity input module 22 of the relay protection device 20 to be tested is tested one by one. The binary input quantity display state can be realized by observing the computer of the multi-machine automatic test background system 30, and the color conversion of the binary input quantity display state is set according to actual needs. For example, the binary input quantity display state can change from green to red, or from red to green, which indicates the state change of the binary input quantity. When the last relay protection device 20 to be tested is tested, the multi-machine automatic test background system 30 sends a return instruction to the output relay of the binary input quantity detection module 12. As a result, the cumbersome operation of manual input of binary input quantity in the prior art is reduced, and the convenience of operation is improved.

[0057] S110, conduct output quantity test, the multi-machine automatic test background system 30 sends closing instructions to the switching relays of the output quantity detection module 14 of the 1st to the Nth units in sequence, sends closing and return instructions to the output relays of the output quantity output module 24, and observes the output quantity display status of the corresponding relay protection device 20 to be tested on the multi-machine automatic test background system 30 until the test of all output quantity output modules 24 is completed.

[0058] In this embodiment, the output quantity output module 24 of the relay protection device 20 to be tested is tested one by one. The output quantity display state can be realized by observing the computer of the multi-machine automatic test background system 30, and the color conversion of the output quantity display state is set according to actual needs. For example, the output quantity display state can change from green to red, or from red to green, so that the state change of the output quantity can be indicated. As a result, the cumbersome operation of manually inputting the output quantity in the prior art is reduced, and the convenience of operation is improved.

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

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

[0061] S114, perform current and voltage sampling and automatic meter reading, the multi-machine automatic test background system 30 automatically sends current and voltage output control instructions to the three-phase AC standard source 40, and reads the measurement data of the 1st to Nth relay protection devices 20 to be tested in turn to complete the current and voltage automatic meter reading of the relay protection devices 20 to be tested.

[0062] S116, after each test task is completed, the multi-machine automatic test background system 30 automatically displays the test results, and automatically saves each test data and test results into the test report, and the relay protection device multi-machine automatic test tool 10 and the relay protection device to be tested 20 are powered off.

[0063] In this embodiment, the test report can show the results of passing or failing each test data. The test data and test results are finally stored in the computer of the multi-machine automatic test background system 30 for subsequent query.

[0064] S118 , replacing a batch of relay protection devices 20 to be tested, and repeating steps S102 to S116 to complete the test of this batch of relay protection devices 20 to be tested.

[0065] To sum up, the multi-machine automatic testing method applicable to relay protection devices according to an embodiment of the present invention has achieved at least the following technical effects: the present testing method realizes batch testing of the relay protection devices to be tested by automatically switching different test channels. It can be seen that the multi-machine automatic testing method applicable to relay protection devices of the present invention can not only solve the problems of repeated wiring and cumbersome manual operation required for testing multiple relay protection devices to be tested in the prior art, but also reduces the testing cost and improves the reliability of the test results and the production testing efficiency.

[0066] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] In the description of the present invention, the directions or positional relationships indicated by the terms "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0070] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A multi-machine automatic test system suitable for relay protection devices, characterized in that: include: A relay protection device multi-machine automatic test tool (10), a plurality of relay protection devices to be tested (20) and a multi-machine automatic test background system (30), wherein the relay protection device multi-machine automatic test tool (10) is communicatively coupled to the multi-machine automatic test background system (30), the relay protection device multi-machine automatic test tool (10) is connected to the plurality of relay protection devices to be tested (20), and the relay protection device multi-machine automatic test tool (10) is used to sequentially establish communication connections with the plurality of relay protection devices to be tested (20) and to test the relay protection devices to be tested (20) in communication.

2. The multi-machine automatic test system for relay protection devices according to claim 1 is characterized in that: The invention also comprises a three-phase AC standard source (40), wherein the three-phase AC standard source (40) is communicatively coupled to the multi-machine automatic test background system (30), and the three-phase AC standard source (40) is connected to the multi-machine automatic test tool (10) of the relay protection device, and is used for outputting corresponding current and voltage quantities to the multi-machine automatic test tool (10) of the relay protection device after receiving a current and voltage output instruction issued by the multi-machine automatic test background system (30).

3. The multi-machine automatic test system applicable to relay protection devices according to claim 1 is characterized in that: The relay protection device multi-machine automatic test tool (10) comprises a serial communication detection module (11), the relay protection device to be tested (20) comprises 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 test system applicable to relay protection devices according to claim 3 is characterized in that: The relay protection device multi-machine automatic test tool (10) comprises a binary input detection module (12), the relay protection device to be tested (20) comprises a binary input input module (22), and the binary input detection module (12) is connected to the binary input input module (22).

5. The multi-machine automatic test system applicable to relay protection devices according to claim 3 is characterized in that: The relay protection device multi-machine automatic test tool (10) comprises a current and voltage detection module (13), the relay protection device to be tested (20) comprises a current and voltage acquisition module (23), and the current and voltage detection module (13) is connected to the current and voltage acquisition module (23).

6. The multi-machine automatic test system applicable to relay protection devices according to claim 4 is characterized in that: The relay protection device multi-machine automatic test tool (10) comprises an output quantity detection module (14), the relay protection device to be tested (20) comprises an output quantity input module (24), and the output quantity detection module (14) is connected to the output quantity input module (24).

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

8. The multi-machine automatic test system applicable to relay protection devices according to claim 1 is characterized in that: It also includes a plurality of card boards, the number of which is not less than the number of the relay protection devices (20) to be tested, and the card boards are respectively connected to the relay protection device multi-machine automatic test tool (10) and the plurality of relay protection devices (20) to be tested.

9. The multi-machine automatic test system applicable to relay protection devices according to claim 8, characterized in that: The card board is provided with a connection device adapted to the shape of the back plate of the relay protection device (20) to be tested, one side of the connection device is connected to the relay protection device multi-machine automatic test tool (10), and the other side of the connection device is connected to the back of the relay protection device (20) to be tested.

10. A multi-machine automatic testing method applicable to relay protection devices, characterized in that: The test is completed by using the multi-machine automatic test device for relay protection devices according to any one of claims 1 to 9, and the test method includes: S102, supplying power to a relay protection device multi-machine automatic test tool (10) and a three-phase AC standard source (40), and running a multi-machine automatic test background system (30); S104, respectively clamping N card boards to the backplane positions of N relay protection devices (20) to be tested, and supplying power to the N relay protection devices (20) to be tested, wherein N is a positive integer; S106, the multi-machine automatic test background system (30) automatically sets the serial port communication addresses of the N relay protection devices (20) to be tested and establishes a communication connection; S108, performing a binary input test, the multi-machine automatic test background system (30) sequentially sends a closing command to the output relays of the binary input detection modules (12) of the first to the Nth units, sends a closing and return command to the switching relays of the binary input input modules (22), and observes the binary input display status of the corresponding relay protection device (20) to be tested on the multi-machine automatic test background system (30) until the test of all the binary input input modules (22) is completed; S110, conduct output quantity test, the multi-machine automatic test background system (30) sends closing instructions to the switching relays of the output quantity detection modules (14) of the first to the Nth units in sequence, sends closing and return instructions to the output relays of the output quantity output modules (24), and observes the output quantity display status of the corresponding relay protection device (20) to be tested on the multi-machine automatic test background system (30) until the test of all the output quantity input modules (24) is completed; S112, automatic calibration of current and voltage sampling is performed, the multi-machine automatic test background system (30) automatically sends a current and voltage output control instruction to the three-phase AC standard source (40), and sequentially sends a current and voltage sampling calibration instruction to the first to Nth relay protection devices (20) to be tested, so as to complete the current and voltage sampling calibration of the relay protection devices (20) to be tested; S114, automatic meter reading of current and voltage sampling is performed, and the multi-machine automatic test background system (30) automatically sends a current and voltage output control instruction to the three-phase AC standard source (40), and sequentially reads the measurement data of the first to Nth relay protection devices (20) to be tested, so as to complete the automatic meter reading of current and voltage of the relay protection devices (20) to be tested; S116, after each test task is completed, the multi-machine automatic test background system (30) automatically displays the test results, and automatically saves each test data and test results into a test report, and the relay protection device multi-machine automatic test tool (10) and the relay protection device to be tested (20) are powered off; S118, replacing a batch of relay protection devices (20) to be tested, and repeating steps S102 to S116 to complete the test of this batch of relay protection devices (20) to be tested.

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