A detection method for output pulse width accuracy of automation and protection equipment

Abstract

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. The present invention includes test computer, local control unit LCU, end distribution board and relay protection or safety automatic device; wherein, test computer 1 is connected with one end of local control unit LCU, and the other end of local control unit LCU is connected with terminal The distribution board is connected, and the other end of the end distribution board is connected with the relay protection or safety automatic device. While ensuring the measurement accuracy, the present invention reduces the cost of equipment purchase and maintenance, and improves the work efficiency and economy of on-site inspection. At the same time, the wiring method is simple, and the device to be verified will not be powered on and operated, and there will be no misoperation. It also has the advantages of simple wiring, less workload, direct comparison of test results, and convenient quality evaluation of the pulse width issued by the device.

Description

technical field [0001] The invention belongs to the technical field of industry, and in particular relates to a method for detecting pulse width accuracy of automation and protection equipment, which is applied to automation devices and relay protection equipment to carry out regular inspection and calibration. Background technique [0002] According to electric power industry specifications, on-site automation devices and relay protection equipment of hydropower stations need to be regularly calibrated 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 pulse width of automation devices and relay pro...

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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