Double-column horizontal opening type disconnecting switch closing machinery defect diagnosis method

Abstract

The invention belongs to the technical field of power equipment defect detection methods, and particularly relates to a double-column horizontal opening type disconnecting switch closing machinery defect diagnosis method. The method comprises the following steps: firstly, constructing a closing travel curve according to a normally-operated double-column horizontal open type isolation switch to obtain corresponding data of the normal travel curve; and drawing an actual measurement closing stroke curve in the closing process of the to-be-measured double-column horizontal opening type isolation switch. Fault identification and detection are carried out according to the difference between an actual measurement curve and a normal curve; according to the invention, rapid and effective determination of various mechanical defects of the double-column horizontal opening type isolation switch is realized by using a digital quantification method; the improvement of the diagnosis efficiency and accuracy of the mechanical defects of the isolation switch is facilitated; operation reliability of the isolation switch is improved, a design basis is provided for realization of digital intelligent monitoring, automatic monitoring and alarm can be conveniently realized through utilizing equipment such as a sensor based on the method and the criterion rule, industrial implementation is facilitated,and the method has good application prospects.

Description

technical field [0001] The application belongs to the technical field of defect detection methods for electric equipment, and in particular relates to a method for diagnosing mechanical defects of a double-column horizontal opening type isolating switch. Background technique [0002] High-voltage isolating switch is the largest number of switching devices in power plants and substations. It has various structural forms such as horizontal and vertical, and has the functions of isolating power supply, switching operation, connecting and cutting off small current circuits, etc. During the installation and operation of the isolating switch, affected by the installation and commissioning experience and the harsh environment (rain, ice, sand), there may be bearing jams, operating rod jams, contact corrosion, insufficient clamping force, and three-phase Potential defects such as out-of-phase, spring failure, and insufficient stroke are difficult to detect in time through manual ope...

AI Technical Summary

Problems solved by technology

This method is not easy to detect early general defects, which will lead to the operation of the disconnector with defects. Typical defects such as three-phase out-of-phase, contact angle deviation, and stroke overrun can lead to poor contact, contact fatigue, and overheating of contacts. and other problems, which reduce the reliability and service life of the switchgear

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