An online comparison and detection method of a power quality monitoring device

Abstract

The present invention relates to the technical field of power equipment detection, in particular to an online comparison detection system and detection method of a power quality monitoring device. The system includes a signal acquisition module, a standard power quality monitoring device, a tested power quality monitoring device, a network switch, The detection host, the present invention compares the result of measuring the power quality index of the monitoring point signal by the standard power quality monitoring device with the result of measuring the power quality index of the monitoring point signal by the tested power quality monitoring device, and calculates the error, thereby judging the detected Whether the power quality index measurement result of the power quality monitoring device is qualified, complete the on-site inspection of the power quality monitoring device without changing the wiring of the power quality monitoring device under test and stopping the normal operation of the power quality monitoring device under test for a short time, The detection efficiency is improved, the cost of manpower and material resources is reduced, and the regular detection work of the power quality monitoring device can be effectively carried out.

Description

technical field [0001] The invention relates to the technical field of power equipment detection, in particular to an online comparison detection method for a power quality monitoring device. Background technique [0002] The operation management of power quality monitoring devices is one of the tasks of power quality technical supervision. After the power quality monitoring device has been operated for a long time in the harsh electromagnetic environment, it is inevitable that the reliability and measurement accuracy of the power quality monitoring device will decrease due to the aging and failure of components, and a large amount of invalid and abnormal data will be generated. Conduct regular testing. [0003] At present, the detection of power quality monitoring devices is usually realized based on the standard source method, and there are mainly the following two implementation methods: 1. Remove the power quality online monitoring device and send it to the laboratory, ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the standard source (such as: FLUKE 6100 series) is usually too large to be carried, and the instrument is very precise and easy to be damaged. Sometimes it is necessary to carry several standard sources together to form a three-phase circuit for detection

Although some portable standard sources (such as: CMC series standard sources produced by Omicron) are convenient and easy to use, the accuracy of their output signals is low, especially for the generation of some high-order harmonic signals, which will inevitably affect The test results of the monitoring device

[0004] To sum up, there are many deficiencies in the existing technology, and because the power quality online monitoring devices have the characteristics of large number and scattered installation, if the power quality monitoring devices are regularly tested according to the existing technology, it is necessary to invest a lot of manpower and resources. Material resources, so the realizability is poor, making it difficult to carry out regular inspection work effectively

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