Fault indicator test system based on real-time digital simulation system

Abstract

The present invention discloses a fault indicator test system based on a real-time digital simulation system. The fault indicator test system comprises a real-time digital simulation system, a voltageamplifier, a voltage transformer, a current amplifier and a tested fault indicator. Prior to starting of the test, an electric primary system simulation network is generated in a real-time digital simulation system according an electric primary system network graph when the tested fault indicator is operated on the scene and parameters and an electric system primary device; a voltage and a current of a certain section of a transmission line are output to a small signal voltage according to a certain change, the small signal voltage is amplified to obtain a primary voltage and a primary current at the installation position of the fault indicator, and the primary voltage and the primary current are output to the tested fault indicator; and finally, fault simulation is performed to achieve function test of the tested fault indicator. The fault indicator test system based on the real-time digital simulation system can perform test of the fault indicator to more really simulate the scene operation environment of the fault indicator and greatly improve the operation reliability of the fault indicator after the fault indicator is operated on the scene.

Description

technical field [0001] The invention relates to a fault indicator test system based on a real-time digital simulation system, and belongs to the technical field of power system distribution automation terminal equipment test. Background technique [0002] A fault indicator is a device used to detect short circuits and ground faults in power systems. The fault indicator is installed on the power transmission and distribution lines, power cables and switchgear inlet and outlet lines. When a fault current flows through the fault indicator, the fault indicator will turn over and transmit the action signal to the background monitoring software to indicate faulty line. Line inspectors can use the alarm display of the fault indicator to quickly determine the fault point on the line and eliminate the fault, thus changing the backward practice of blindly inspecting the line in the past, closing the line and sending power one by one to find faults, and improving the efficiency of fau...

AI Technical Summary

Problems solved by technology

Using this method to test the fault indicator, it is impossible to simulate the transient component of the electrical quantity waveform when the power system fails, the excitation inrush current of the line cannot be simulated, and the multiple sets of fault indicators installed in multiple sections on the distribution line cannot be tested.

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