Switch cabinet state monitoring and diagnosing method and system

Abstract

The invention provides a switch cabinet state monitoring and diagnosing method and system. The switch cabinet state monitoring and diagnosing method comprises the following steps that a reference sequence x<0>=[x<1> x<2 > x<3>... x<n>] is determined; data of each monitoring unit collected by a sensor module are obtained; a comparison sequence x=[x<i1> x<i2> x<i3>... x<in>] is determined; the difference delta o(tn) of the reference sequence and the comparison sequence is calculated; the correlation coefficient epsilon o(tn) is calculated; the relevancy gamma i is calculated; the sequence of defect causes of a switch cabinet is ranked; the defect cause ranking first is taken as diagnosis data; and the diagnosis data are displayed. The switch cabinet state monitoring and diagnosing method and system have the beneficial effects that a plurality of monitoring units are arranged on the switch cabinet, a plurality of signals of the switch cabinet can be simultaneously detected, and multidimensional data formed by the signals are comprehensively processed and analyzed to monitor the operation state of the switch cabinet and diagnose the fault defects of the switch cabinet.

Description

technical field [0001] The disclosure relates to the technical field of switchgear safety monitoring, and in particular to a method and system for monitoring and diagnosing the state of a switchgear. Background technique [0002] The switchgear is an important component unit in the power grid system, which plays a dual role in controlling and protecting electrical equipment. In the long-term operation, the insulation failure of the switchgear has brought hidden dangers to the reliable operation of the power grid. The direct harm is the damage to the lines and equipment controlled and protected by the switchgear, and the loss of power; the indirect harm is to cause large-scale power outages for users, causing huge Therefore, it is necessary to pay close attention to the operation status of the switchgear. [0003] Among the common types of faults in switchgear, the highest failure rates are insulation faults, mechanical faults, and temperature rise faults. Relying on manual ...

AI Technical Summary

Problems solved by technology

However, due to the complex internal structure of the switchgear, the problem of difficult wiring of sensors and high wiring costs often occurs, which limits the data collection and transmission of switchgear equipment

In addition, the fault diagnosis of the existing switchgear is to diagnose the collected data based on the diagnostic method of the threshold value. This diagnostic method simplifies the problem, the diagnostic accuracy is not high, and it cannot comprehensively analyze and diagnose the multi-dimensional data.

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