GIS insulation state diagnosis method based on gas component analysis

Abstract

The invention provides a GIS insulation state diagnosis method based on gas component analysis. The GIS insulation state diagnosis method based on gas component analysis comprises the steps that the moisture content inside a GIS gas chamber is measured through a precision mirror plane dew point method; when the moisture content inside the GIS gas chamber meets requirements, varieties and contents of gas decomposition components inside the GIS gas chamber are determined through measurement, and whether electric discharge exists inside GIS equipment or not is judged; if electric discharge exists in the GIS equipment, whether electric discharge in the GIS equipment relates to an organic insulating medium or an inorganic insulating medium is judged according to whether carbonaceous electric-discharge-related gas decomposition components exist inside the GIS equipment. Compared with GIS insulation state diagnosis methods in the past, the GIS insulation state diagnosis method based on gas component analysis has the advantages that the anti-electromagnetic interference performance is better, on-line GIS equipment insulation state diagnosis can be realized, detect type judgment is simpler, and the GIS insulation state diagnosis method is easier to apply and popularize.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a GIS insulation state diagnosis method based on gas component analysis. Background technique [0002] Due to its high operational reliability and small footprint, gas insulated switchgear (GIS) has been widely used in the current power grid operation, and the related insulation status monitoring and diagnosis research has become more important. [0003] According to the different types of detected signals, traditional GIS state diagnosis methods can be divided into two types: electrical and non-electrical. Among them, electrical methods include pulse current method and ultra-high frequency method; non-electric methods include ultrasonic method, light detection method and gas component analysis method. [0004] The pulse current method is a state monitoring method that has been put into practical use for the longest time, and the relevant test and analysis methods have f...

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Problems solved by technology

[0013] Based on the above, the gas composition analysis method has unique advantages in the field application and promotion of GIS insulation state diagnosis, but it is still unable to accurately establish the corresponding relationship between the gas composition and the defect type, that is, to identify the type and type of the internal defect of the equipment. Severity, providing basis for equipment fault diagnosis and follow-up processing

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