Comprehensive evaluation method for basin insulator defects of EHV/UHV gis equipment

Abstract

The invention discloses a comprehensive evaluation method for defects of basin-type insulators of ultra / ultra-high voltage GIS equipment, including determining the main latent defects existing on typical basin-type insulators of GIS equipment; establishing an electric field finite element analysis program, and through simulation and test Measure the electric field distortion coefficient under various defects of the pot insulator; calculate the electric field intensity of different radial distances under various defects of the pot insulator; classify the defects according to the flashover type, construct the comprehensive evaluation function of the latent defect and use the evaluation function The value is used to evaluate the defect level of pot insulators. The invention realizes the quantitative analysis of the latent defects of the pot insulator without dismantling the GIS equipment, reduces or avoids various accidents caused by the latent defects of the pot insulator to a large extent, and ensures that the GIS equipment Safe and reliable operation and even the stable operation of the entire power system have extensive practicability and economy.

Description

technical field [0001] The invention belongs to the technical field of on-line detection and comprehensive evaluation of latent defects of insulators of super / ultra-high voltage GIS equipment, and specifically relates to a comprehensive evaluation method for latent defects of typical pot insulators of super / ultra-high voltage GIS equipment. Background technique [0002] In recent years, with the acceleration of social industrialization and the continuous improvement of people's living standards, in order to meet the sharp increase in electricity demand, new requirements have been put forward for the voltage level of my country's transmission network. However, gas insulated switchgear (GIS) Because of its compact structure, good insulation performance, small maintenance, high power supply reliability and many other advantages, it is widely used in EHV / UHV power systems, and it plays a vital role in power systems. [0003] As the core component in GIS, the pot insulator has the...

AI Technical Summary

Problems solved by technology

Because the qualitative analysis has a certain degree of subjectivity and ambiguity, it cannot objectively, accurately and comprehensively reflect the latent defect level of the typical pot insulators of GIS equipment, so that it cannot arrange maintenance in a timely and reasonable manner and make appropriate treatment, which leads to the failure of GIS equipment. Faults occur and affect the stable operation of the power system

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