高压电器2024，Vol.60Issue(5)：12-19,30,9.DOI:10.13296/j.1001-1609.hva.2024.05.002
GIS设备内外部紧固松动机械缺陷振动特性对比分析研究
Comparative Analysis and Research on Vibration Characteristics of Internal and External Fastening Loose Mechanical Defects of GIS Equipment
摘要
Abstract
The mechanical defect of gas insulated switchgear(GIS)is an important cause of equipment failure.In case of mechanical defects in GIS,abnormal vibration signals will be generated under the action of AC electrodynam-ic force.The detection and diagnosis on the mechanical defects of equipment can be achieved by measuring the me-chanical vibration signals on the GIS enclosure.Either internal or external fastening looseness of GIS equipment is a common mechanical defect on site.However,at present,the vibration signal characteristics of internal and external fastening looseness defects are unclear,which restricts the detection and diagnosis of this type of defects on site.In view of this,such two kinds of defects as internal shield looseness and external anchor bolt looseness on real 550 kV GIS test platform are constructed,and the relevant relations among frequency domain characteristics,signal charac-teristic and load in case of vibration signals at different defects are compared.The result shows that neither internal nor external defects will cause the variation of 100 Hz fundamental frequency vibration signal,but only cause the slight increase of signal of other frequency points.Therefore,both internal and external looseness defects will not cause obvious increase of vibration signal amplitude of equipment;Comparatively speaking,the internal looseness defects mainly cause the increase of low-frequency signal components such as 200 Hz and 300 Hz,while external looseness defects mainly cause the increase of amplitude of high-frequency signal components above 1 500 Hz;The increase amplitude of low-frequency signal component due to internal looseness defect increases significantly with the increase of load current,while the increase amplitude of high-frequency component due to external looseness de-fect has little correlation with load current.The research result in this paper has provided theoretical support for the detection and analysis of internal and external looseness defects in field GIS.关键词
气体绝缘组合电器/机械缺陷/振动/基频/频谱Key words
gas insulated switchgear(GIS)/mechanical defect/vibration/fundamental frequency/frequency spectrum引用本文复制引用
李国栋,俞华,刘宏,李帅,闫艳春,张昭宇,李军浩..GIS设备内外部紧固松动机械缺陷振动特性对比分析研究[J].高压电器,2024,60(5):12-19,30,9.基金项目
国网山西省电力公司科技项目资助(520530200010). Project Supported by Science and Technology Project of State Grid Shanxi Electric Power Company(520530200010). （520530200010）
