Zero resistance insulator detection method on basis of finite element database

Abstract

The invention relates to a zero resistance insulator detection method on the basis of a finite element database, which comprises the following steps of: by utilizing finite element analysis software, establishing a model database of a typical power transmission line tower and a corresponding insulator string; and carrying out electric field analysis on an insulator string model in the model database by the finite element analysis software, adopting a non-contact electric field test method when carrying out field testing on a zero resistance insulator, comparing a field test result with a finite element calculating result and effectively identifying whether the zero resistance insulator exists in the line insulator string and a specific position thereof. According to the invention, the zero resistance insulator detection method is on the basis of the finite element emulation calculation; the electric field distribution conditions of various towers and insulator strings can be mastered; part of test work is replaced with calculation; and the workload is lower. Meanwhile, the non-contact electric field test method can be used as the zero resistance insulator detection method; the specific position of the zero resistance insulator can be identified; and the zero resistance insulator detection method has the advantages that workers do not need to climb the tower to work, power does not need to be switched off to carry out detection, the zero resistance insulator detection method is safe and reliable and the like.

Description

technical field [0001] The invention belongs to a zero-value insulator detection method, in particular to the technical field of a zero-value insulator detection method based on a finite element database. Background technique [0002] Insulators are an important part of transmission lines and play the role of mechanical connection and electrical insulation. For a long time, the detection of zero-value insulators has been an important task of the line operation department. Conventional zero-value insulator detection methods include spark gap method, voltage distribution method, corona pulse method, infrared thermal imaging temperature measurement method, etc., but these methods have certain defects. Among them, the spark gap method has a large workload, and may short-circuit good insulators, thereby further weakening the effective insulation distance of the insulator string and aggravating the threat of short-circuit faults; the voltage distribution method requires manual te...

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Problems solved by technology

Among them, the spark gap method has a large workload, and may short-circuit good insulators, thereby further weakening the effective insulation distance of the insulator string and aggravating the threat of short-circuit faults; the voltage distribution method requires manual testing on the tower, which consumes a lot of manpower; corona pulse method measurement The corona pulse current of the insulator string needs to be in direct contact with the measured object, and cannot directly reflect the discharge change of the insulator

Infrared thermal image temperature measurement is judged by the infrared imaging results of insulators. The method is affected by meteorological conditions, external heat source interference, etc., and cannot be accurately judged.

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