Method for automatically checking protection functions of microcomputer main-transformer differential protection device
A technology of differential protection device and protection function, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of missing calibration, insufficient inspection work time, hidden dangers of power system safety, etc., to improve work efficiency and improve equipment. The level of safe operation and the effect of eliminating potential safety hazards
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[0031] In the following, the method for automatically verifying the protection function of the microcomputer-based main transformer differential protection device provided by the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
[0032] The present invention utilizes the hardware resources generally configured by the existing protection device, without additional hardware, and adopts the method of adding an independent test program to realize functional verification; its hardware coordination logic is as follows figure 1 As shown; at the same time, the external loop analog input is not needed to simulate the fault, and the device software is used to set the method of simulating the fault, such as figure 2 As shown; the accuracy verification of the sampling part of the device should be carried out in addition to the protection tester, etc., without increasing the hardware overhead and changing the hardware configurat...
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