Method for detecting switch-on pulse width precision of automatic and protection equipment

Abstract

The invention belongs to the technical field of industries, and especially relates to a method for detecting switch-on pulse width precision of automatic and protection equipment. The method is applied to developing regular inspection and checking work on an automatic device and relay protection equipment. The method comprises a test computer, a local control unit LCU, an end distribution board, and a relay protection or safety automatic device; the test computer 1 is connected with one end of the local control unit LCU, the other end of the LCU is connected with the end distribution board, and the other end of the end distribution board is connected with the relay protection or safety automatic device. The equipment purchasing and maintenance cost of the equipment is reduced while the measurement precision is guaranteed, the field checking working efficiency and the economy are improved; and meanwhile, the wiring way is simple, the checked equipment is free from power-on and like operations, and the malfunction behavior is avoided. The method further has the advantages of being simple in wiring, less in workload, capable of directly comparing a detection result, and convenient toevaluate the quality of the device switch-on pulse width.

Description

technical field [0001] The invention belongs to the field of industrial technology, and in particular relates to a detection method for the accuracy of output pulse width of automation and protection equipment, which is applied to automatic equipment and relay protection equipment for regular inspection and calibration. Background technique [0002] According to the power industry norms, on-site automation devices and relay protection equipment of hydropower stations need to regularly carry out device verification work according to the actual operation conditions. The detection of the pulse signal width of the device is one of the important detection items, which is used to determine the pulse width of the device. Whether it matches the action control logic of the field device, and whether it can reliably drive the external device to act correctly according to the set logic within the pulse width range. At present, the on-site detection of the output pulse width of automatio...

AI Technical Summary

Problems solved by technology

At present, the on-site detection of the output pulse width of automation devices and relay protection equipment still depends on the relay protection tester. Although this type of instrument has high measurement accuracy, the purchase price is also high, and it is necessary to regularly entrust a professional testing unit to test the instrument. The detection accuracy is verified, the maintenance cost is high, and the overall application economy is low

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