Switching value contact performance tester of relay protection device

Abstract

The invention provides a switching value contact performance tester of a relay protection device. The switching value contact performance tester of the relay protection device comprises a CPU module, a human-machine interface (HMI), a switching value input isolation circuit, a switching value output isolation circuit, an IRIG-B decoding circuit and a power source circuit, wherein the input port of the CPU module is connected with an input test end through the switching value input isolation circuit, and the output port of the CPU module is connected with an output test end through the switching value output isolation circuit. The IRIG-B decoding circuit and the HMI are connected with the CPU module. The tester can carry out a common switching value displacement test when capable of receiving an IRIG-B code pair of a GPS clock synchronizer in a transformer substation, correctly simulate an SOE test and realize simultaneous tests on multiple paths of outlet contacts, is easy to operate, is convenient to use, and largely improves the efficiency of the switching value test of the relay protection device.

Description

technical field [0001] The invention relates to a relay protection device testing technology, in particular to a relay protection device switching contact performance tester. Background technique [0002] The power grid relay protection inspection regulations clearly stipulate the inspection items of various types of relay protection devices with different voltage levels, including the inspection of the relay protection device binary input and binary output contact items. At present, for the inspection of binary inputs, most methods use manual short-circuiting of the input contacts one by one, which is time-consuming and cumbersome, and manual short-circuiting of the input contacts cannot accurately simulate the SOE resolution test, such as the devices of Nanjing NARI, Beijing Sifang and other manufacturers. The technical specification specifies that the SOE resolution of each protection device is ≤2ms, and the resolution requirements are strict. [0003] For output inspect...

AI Technical Summary

Problems solved by technology

At present, for the inspection of binary inputs, most methods use manual short-circuiting of the input contacts one by one, which is time-consuming and cumbersome, and manual short-circuiting of the input contacts cannot accurately simulate the SOE resolution test, such as the devices of Nanjing NARI, Beijing Sifang and other manufacturers. The technical specification clarifies that the SOE resolution of each protection device is ≤2ms, and its resolution requirements are strict

[0003] For output inspection, most current methods use a multimeter to directly measure the potential of the relay protection outlet, which has disadvantages such as difficult to observe the indication and inaccurate testing, and for 220kV and above line protection, main transformer protection and other protection devices , due to its many outlet circuits, multiple inspections are required, which greatly reduces work efficiency

Under the existing technical conditions, although the relay protection tester can be used to measure the exit time, it is still necessary to set the state sequence of the relay protection tester and check each outlet one by one, which is inefficient

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