Batch testing system and testing method for relay protection device

Abstract

The invention discloses a batch test system for relay protection devices. The system comprises a relay protection test box (5), a relay protection tester (1), a network switch (2), a communication management machine (3), and a workstation (4). Before testing, the current terminals of a plurality of relay protection devices are connected in series, the voltage terminals are connected in parallel, the switch inputs are connected in parallel, the switch outputs are connected in parallel, and then connected to the relay protection test box through the test terminals. During testing, a plurality of devices can be tested simultaneously, reducing the workload of repeated wiring and repeated testing, achieving high testing efficiency, high system utilization, saving manpower, and improving factory testing efficiency.

Description

Technical Field

[0001] The invention relates to a testing system, in particular to a relay protection device testing system and a testing method thereof. Background Art

[0002] Relay protection devices are used to protect power equipment in medium and high voltage power systems. Currently, factory tests of relay protection devices all use single-unit tests. During batch production, repeated testing and wiring work are required, which results in a large workload for testers and low testing efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a batch test system for relay protection devices, which can realize batch testing of relay protection devices of the same type or with the same hardware structure at one time, and solve the problem of repeated test content and repeated wiring of multiple devices. The technical solution of the present invention is: a batch test system for relay protection devices, a batch test system for relay protection devices, characterized in that: it includes a relay protection tester (1), a network switch (2), a communication management machine (3), a workstation (4), and a relay protection test box (5), the relay protection test box (5) includes a switch input test module, a switch output test module, a current test terminal, a voltage test terminal, a circuit breaker simulation module, and a common terminal block; the switch input test module includes a knob switch and a switch input test terminal, the switch output module includes an output indicator light and a switch output test terminal, and the circuit breaker simulation module includes an opening relay, a closing relay, a position indicator light, an opening and closing test switch, and a circuit breaker test terminal; the connection method between the various components is: the network interface of the communication management machine (3) is connected to the network switch (2), and the workstation ( 4) is connected to the switch (2) through a network cable, the current and voltage output terminals of the relay protection tester (1) are respectively connected to the current and voltage input terminals of the common terminal block in the relay protection test box (5), the current output terminal of the common terminal block in the relay protection test box (5) is connected in series with each current test terminal, the current output terminal of the last current test terminal is short-circuited and then connected to the common terminal block of the relay protection test box (5), the other side of the common terminal block is connected to the N-phase output terminal of the relay protection tester (1), the voltage output terminal of the relay protection tester (1) is connected to the voltage terminal of the common terminal block of the relay protection test box (5), the other end of the common terminal block is connected in parallel with each voltage test terminal block, the switch input test terminal of the relay protection test box (5) is connected in parallel, and the switch output module and the circuit breaker simulation module of the relay protection test box (5) correspond one to one to the relay protection circuit to be tested.

[0004] A batch test system for relay protection devices, characterized in that each RS485 interface of a communication management machine (3) is provided with 1 to 8 serial communication test interfaces.

[0005] A batch testing system for relay protection devices, characterized in that the RJ45 interface output end of a network switch (2) is provided with an RJ45 interface terminal.

[0006] A batch test system for relay protection devices, characterized in that: the display screen of a workstation (4) includes relay protection device switch input light characters, protection action information light characters, current and voltage analog quantity displays, and when there is information change, the corresponding light characters change from green to red.

[0007] A batch test system for relay protection devices, characterized in that: a tripping output test terminal of the relay protection device is connected to a tripping command input of a control plug-in of a relay protection test box (5), a closing output test terminal of the relay protection device is connected to a closing command input of the control plug-in, and a signal output test terminal of the relay protection device is connected in series with an output indicator light.

[0008] A batch test system for relay protection devices, characterized in that the power supplies of the relay protection devices to be tested and the relay protection test box (5) all use the same power supply.

[0009] A batch test system for relay protection devices, characterized in that the current test terminals, voltage test terminals, switch input test terminals, switch output test terminals and circuit breaker test terminals of a relay protection test box (5) are matched with the wiring terminals of the relay protection devices to be tested.

[0010] A batch test system for relay protection devices, characterized in that the wiring length between test terminals with the same test function is greater than the distance between the same circuit terminals of the tested devices.

[0011] A test method for a batch test system of relay protection devices, wherein the communication address of the relay protection devices under test corresponds to the address of the test system, and the secondary protection test constants of the relay protection devices under test with the same protection function are the same.

[0012] A test method for a batch test system of a relay protection device, wherein the communication protocol of the relay protection devices to be tested connected to the same RS485 bus of a communication management machine (3) is the same. The working principle of the invention is:

[0013] like Figure 1As shown, the RS485 test terminal is inserted into the tested device with an RS485 interface, and the RJ45 test terminal is inserted into the tested device with an RJ45 interface. When the tested device has both an RJ45 interface and an RS485 interface, only one of the interfaces can be selected for communication. The switch input test terminal, the switch output test terminal, the circuit breaker test terminal, the voltage terminal, and the current terminal are respectively connected to the corresponding plug-in terminals of the relay protection, which is equivalent to connecting the switch input circuit of each device in parallel, the current circuit in series, the voltage circuit in parallel, and the switch output circuit, i.e., the output circuit and the control circuit, are tested independently. In order to ensure that the test terminals can be connected to the corresponding tested device, the current test terminal, the voltage test terminal, the switch input test terminal, the switch output test terminal, and the circuit breaker test terminal of the relay protection test box (5) are matched with the wiring terminals of the tested relay protection device, and the wiring length between each test terminal with the same test function is greater than the distance between the terminals of the same circuit between the tested devices. If the wiring length between the test terminals is less than the distance between the terminals of the same circuit between the tested devices, the distance between the terminals will be insufficient, and adjacent devices cannot be connected. The communication address of the relay protection device under test corresponds to the address of the test system. During the test, the switch quantity and relay protection action information of the relay protection device are displayed on the screen of the workstation (4) of the batch test system. The communication address of the relay protection under test is required to correspond to the address of the test system in order to ensure that the device under test communicates normally with the test system and the action information is consistent with the action information displayed on the screen of the workstation (4). The secondary protection test constants of the same protection function of the relay protection device under test are the same. When the constants are the same, the analog quantity loaded on the relay protection device by the relay protection tester (1) can ensure that all the relay protections under test are actuated. In this way, the protection functions of all the relay protection devices under test can be tested at one time. The communication protocols of the relay protection devices under test connected to the same RS485 bus of the communication management machine (3) are the same. The same communication protocols can ensure that the protection devices connected to the same RS485 bus communicate normally.

[0014] The device under test and the relay protection test box (5) use a DC power supply to prevent power short circuit caused by switch action. Before testing, the address of the device under test needs to be modified according to the communication address configured by the communication management machine while ensuring that the test setting values ​​of the same protection function of the device under test are the same; before preparing for the test, it is necessary to check on the workstation (4) screen that the communication of the device under test is normal;

[0015] like Figure 2As shown, the corresponding switch input circuits of the relay protection device under test are connected in parallel and then connected in series with the test circuits of the relay protection test box (5). In this way, one switch input can simultaneously test the corresponding switch inputs of all connected devices. This connection only requires setting the number of knob switches of the relay protection test box (5) according to the maximum number of switch inputs of all tested devices to simultaneously complete the test of the switch input circuits of all devices. When testing the switch input, the first knob switch is rotated to the test position and the corresponding contact is closed. At this time, the first switch input of all tested devices is set, and all tested devices upload information to the workstation (4) through the communication interface. On the screen of the workstation (4), the light word corresponding to the first switch changes from green to red, and the action information of the first switch is displayed at the same time. By testing other switch inputs in this way, the switch input test can be completed.

[0016] like Figure 4 As shown, the current loop of the device under test is connected in series, the voltage loop is connected in parallel, and when the relay tester (1) outputs the rated voltage and current, all the devices under test collect the corresponding voltage and current analog quantities and upload them to the workstation (4) through the communication interface. At this time, check whether the voltage and current display values ​​corresponding to each device under test displayed on the screen of the workstation (4) are correct;

[0017] like Figure 3 As shown, when testing the relay protection outlet, the voltage and current output by the relay protection tester can meet the action value of the corresponding protection function, and the corresponding relay protection outlet is closed. When the corresponding outlet is a tripping outlet, the tripping relay coil of the relay protection test box (5) is energized and actuated through the control plug-in of the relay protection device to complete the tripping action. At the same time, the position indicator light of the relay protection test box (5) is turned green through the control plug-in of the relay protection device, indicating an opening. When the corresponding outlet is a closing outlet, the closing command closes the closing outlet of the relay protection device, and the closing relay coil of the relay protection test box (5) is energized and actuated through the control plug-in of the relay protection device to complete the closing action. The position indicator light of the relay protection test box (5) is turned red through the control plug-in of the relay protection device, indicating a closing. When the outlet of the relay protection is a signal outlet, the outlet contact is closed, and the signal circuit indicator light of the relay protection test box (5) is energized and lit, and the corresponding outlet indicator light or tripping and closing action status can be visually checked. At the same time, check whether the corresponding information displayed on the screen of the workstation (4) is correct. The corresponding protection action light word on the screen of the workstation 4 (4) changes from green to red.

[0018] When testing the switch input, analog quantity, switch output action or display result of the relay protection device, if an error occurs, the corresponding tested device needs to be repaired and then retested.

[0019] The communication management machine (3) is generally provided with 8 to 16 RS485 interfaces, each RS485 interface of the communication management machine (3) is provided with 1 to 8 serial communication test interfaces, and one bus can be connected to 8 relay protection devices under test, so that the switch quantity input, switch quantity output, analog quantity, protection action test, communication and other functions of multiple relay protection devices can be completed at one time, thereby realizing batch testing of relay protection devices.

[0020] The present invention realizes batch testing of relay protection devices, and the test action status of the tested relay protection devices can be viewed in real time through a workstation.

[0021] Technical effects of the present invention:

[0022] The present invention is to realize batch testing of relay protection devices. The features are as follows:

[0023] 1. Batch test relay protection devices, the number of tests is not limited by the system.

[0024] 2. During testing, there is no need to repeat wiring. Just insert the corresponding test terminal into the device, which greatly reduces the wiring work and avoids the risk of short circuit and personnel safety caused by wiring errors.

[0025] 3. Devices of the same model can be tested simultaneously, and devices of different models but the same hardware structure can also be tested simultaneously.

[0026] 4. In addition to testing the hardware, the communication of the device can also be tested at the same time, with comprehensive testing functions.

[0027] 5. Each device has an independent display result for the corresponding circuit. When any switch quantity, analog quantity or communication of the tested device fails, it is easy to determine the faulty device and faulty circuit.

[0028] 6. Check the test results at a glance through the workstation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the system topology of the present invention

[0030] Figure 2 This is the switch input test principle diagram of the present invention

[0031] Figure 3 The switch output and control plug-in test principle diagram of the present invention

[0032] Figure 4 The current and current loop wiring schematic diagram of the present invention DETAILED DESCRIPTION

[0033] A batch test system for relay protection devices comprises a relay protection tester 1, a network switch 2, a communication management machine 3, a workstation 4, and a relay protection test box 5. The relay protection test box 5 comprises a switch input test module, a switch output test module, a current test circuit, a voltage test circuit, a circuit breaker simulation module, and a common terminal block; the switch input test module comprises a knob switch and a test input terminal, the switch output module comprises an output indicator light and a test output terminal, and the circuit breaker simulation module comprises an opening relay, a closing relay, a position indicator light, an opening and closing test switch, and a test terminal; the connection mode between the components is as follows: the relay protection tester 1 is connected to the relay protection test box 5, the network interface of the communication management machine 3 is connected to the network switch 2, the network interface of the workstation 4 is connected to the switch 2 through a network cable, and the relay protection test box 5 has a test terminal matched with the relay protection device under test; the common One end of the terminal block is connected to the output ends of the three-phase current and zero-sequence current of the relay protection tester 1, and the other end is connected to the current input test terminal of the first relay protection device to be tested. The current output end of the first relay protection device is connected to the current input end of the second relay protection device, and then connected to the current input end of the last relay protection device in sequence. The current output end of the last relay protection device is short-circuited and then connected to the common terminal block of the relay protection test box, and the other side of the terminal block is connected to the N-phase output end of the relay protection tester 1; the voltage output end of the relay protection tester 1 is connected to the voltage terminal of the common terminal block of the relay protection test box, and the other end of the common terminal block is connected in parallel with the voltage test terminals of the relay protection device to be tested through a wire; the corresponding switch quantity test terminals of different devices are connected in parallel and connected in series with the switch quantity input test circuit; the wiring length between each test terminal with the same test function is greater than the distance between the same loop terminals between the devices to be tested.

[0034] A batch test system for relay protection devices, each RS485 interface of a communication management machine 3 has 1 to 8 wiring terminals connected in RS485 bus mode and connected to the RS485 interface of the relay protection device to be tested.

[0035] A batch testing system for relay protection devices, wherein an RJ45 interface output end of a network switch 2 is provided with an RJ45 interface terminal connected to an RJ45 communication interface of a relay protection device to be tested.

[0036] A batch testing system for relay protection devices, the display screen of workstation 4 includes relay protection device switch input light characters, protection action information light characters, current and voltage analog display, when there is information change, the corresponding light characters change from green to red.

[0037] A batch test system for relay protection devices, wherein the tripping output test terminal of the relay protection device is connected to the tripping command input of a control plug-in, the closing output test terminal of the relay protection device is connected to the closing command input of the control plug-in, and the signal output test terminal of the relay protection device is connected in series with an output indicator light.

[0038] A batch testing system for relay protection devices, wherein the power supplies of the tested relay protection devices and a relay protection test box 5 are the same power supply.

[0039] A batch test system for relay protection devices, wherein the secondary protection test settings of the relay protection devices under test with the same protection functions are the same.

[0040] A batch test system for relay protection devices, wherein the communication address of the relay protection device under test corresponds to the address of the test system.

[0041] The specific working process is as follows: Figure 1 As shown, insert the RS485 test terminal into the tested device with RS485 interface, and insert the RJ45 test terminal into the tested device with RJ45 interface. When the tested device has both RJ45 interface and RS485 interface, only one interface can be selected for communication. The switch quantity test terminal, the export test terminal, the control plug-in test terminal, the voltage terminal, and the current terminal are respectively connected to the corresponding plug-ins, which is equivalent to connecting the switch quantity input circuit of each device in parallel, the current circuit in series, the voltage circuit in parallel, and the switch quantity output circuit, i.e., the export circuit and the control circuit, are independent of each other. In order to ensure that the test terminal can be connected to the corresponding test device, the wiring length between the test terminals with the same test function is greater than the distance between the terminals of the same circuit between the tested devices. If the wiring length between the test terminals is less than the distance between the terminals of the same circuit between the tested devices, the distance between the terminals will be insufficient, and adjacent devices cannot be connected.

[0042] The device under test and the relay protection test box use a DC power supply to prevent power short circuit caused by switch action. Before testing, the address of the device under test needs to be modified according to the communication address configured by the communication management machine while ensuring that the test settings of the same protection function of the device under test are the same; before preparing for the test, it is necessary to check on the workstation screen that the communication of the device under test is normal;

[0043] like Figure 2As shown, the corresponding switch input circuits of the relay protection device under test are connected in parallel and then in series with the test circuits of the relay protection test box. In this way, one switch input can test the corresponding switch inputs of all connected devices at the same time. This connection only needs to set the number of knob switches of the relay protection test box according to the maximum number of switch inputs of all tested devices to complete the test of all devices at the same time. When testing the switch input, rotate the first knob switch to the test position and the corresponding contact is closed. At this time, the first switch input of all tested devices is set, and all tested devices upload information to workstation 4 through the communication interface. On the screen of workstation 4, the light word corresponding to the first switch changes from green to red, and the alarm information of the first switch is displayed at the same time. The switch input test can be completed by testing other switch quantities in this way.

[0044] like Figure 4 As shown, the current loop of the device under test is connected in series, the voltage loop is connected in parallel, and when the relay tester outputs the rated voltage and current, all the devices under test collect the corresponding voltage and current analog quantities and upload them to the workstation 4 through the communication interface. At this time, check whether the voltage and current display values ​​corresponding to each device under test displayed on the screen of the workstation 4 are correct;

[0045] like Figure 3 As shown, when testing the relay protection outlet, the voltage and current output by the relay protection tester can meet the action value of the corresponding protection function, and the corresponding relay protection outlet is closed. When the corresponding outlet is a tripping outlet, the tripping relay coil is energized and actuated through the control plug-in of the relay protection device to complete the tripping action. At the same time, the position indicator light turns green through the control plug-in of the relay protection device, indicating opening. When the corresponding outlet is a closing outlet, the closing command closes the closing outlet of the relay protection device, and the closing relay coil is energized and actuated through the control plug-in of the relay protection device to complete the closing action. The position indicator light turns red through the control plug-in of the relay protection device, indicating closing. When the corresponding outlet is a signal outlet, the outlet contact is closed, the signal circuit indicator light is energized and lit, and the corresponding outlet indicator light or tripping and closing action is checked. At the same time, check whether the corresponding information displayed on the screen of workstation 4 is correct. The corresponding protection action light word on the screen of workstation 4 changes from green to red.

[0046] When testing switch input, analog quantity, switch output action or display results are wrong, the corresponding test device must be repaired and then retested.

[0047] The working principle and implementation mode of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above implementation modes. The present invention realizes batch testing of relay protection devices, tests multiple devices at the same time, has comprehensive testing functions, does not require testers to rewire, is efficient and fast, has a simple system structure, and is easy to implement.

Claims

1. A batch test system for relay protection devices, characterized by: The invention comprises a relay protection tester (1), a network switch (2), a communication management machine (3), a workstation (4), and a relay protection test box (5). The relay protection test box (5) comprises a switch input test module, a switch output test module, a current test terminal, a voltage test terminal, a circuit breaker simulation module, and a common terminal block; the switch input test module comprises a rotary switch and a switch input test terminal, the switch output module comprises an output indicator light and a switch output test terminal, and the circuit breaker simulation module comprises an opening relay, a closing relay, a position indicator light, an opening and closing test switch, and a circuit breaker test terminal; the connection between the components is as follows: the network interface of the communication management machine (3) is connected to the network switch (2), the network interface of the workstation (4) is connected to the switch (2) via a network cable, the current and voltage output terminals of the relay protection tester (1) are respectively connected to the current and voltage input terminals of the common terminal block in the relay protection test box (5), the current output terminal of the common terminal block in the relay protection test box (5) is connected in series with each current test terminal, and the last current test terminal The current output end of the relay protection test box (5) is short-circuited and connected to the common terminal block of the relay protection test box (5). The other side of the common terminal block is connected to the N-phase output end of the relay protection tester (1). The voltage output end of the relay protection tester (1) is connected to the voltage terminal of the common terminal block of the relay protection test box (5). The other end of the common terminal block is connected in parallel with each voltage test terminal block. The switch quantity input test terminal of the relay protection test box (5) is connected in parallel. The switch quantity output module of the relay protection test box (5), the circuit breaker simulation module and the switch quantity output module of the relay protection under test are connected in parallel. and circuit breaker simulation modules one by one; the display screen of the workstation (4) includes the relay protection device switch input light word, protection action information light word, current, and voltage analog display, and when there is information change, the corresponding light word changes from green to red; the tripping output test terminal of the relay protection device is connected to the tripping command input of the control plug-in of the relay protection test box (5), the closing output test terminal of the relay protection device is connected to the closing command input of the control plug-in, and the signal output test terminal of the relay protection device is connected in series with the output indicator light.

2. A batch test system for relay protection devices according to claim 1, characterized in that: Each RS485 interface of the communication management machine (3) is provided with 1 to 8 serial communication test interfaces.

3. The batch test system for relay protection devices according to claim 1 is characterized in that: The RJ45 interface output end of the network switch (2) is provided with an RJ45 interface terminal.

4. The batch test system for relay protection devices according to claim 1 is characterized in that: The power supplies of the relay protection device to be tested and the relay protection test box (5) both use the same power supply.

5. The batch test system for relay protection devices according to claim 1 is characterized in that: The current test terminal, voltage test terminal, switch value input test terminal, switch value output test terminal and circuit breaker test terminal of the relay protection test box (5) are matched with the wiring terminals of the relay protection device to be tested.

6. The batch test system for relay protection devices according to claim 1 is characterized in that: The wiring length between the test terminals of the same test function is greater than the distance between the terminals of the same circuit between the devices under test.

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