高压电器2024，Vol.60Issue(5)：214-219,228,7.DOI:10.13296/j.1001-1609.hva.2024.05.027
40.5kV开关柜母线套管受潮后绝缘性能试验研究
Study on Insualtion Performance Test of Bus Bushing of 40.5 kV Switchgear Cabinet After Moisture
张威 1文雅钦 2吴传奇 2李劲彬 2李卫东 1张进1
作者信息
- 1. 国网湖北省电力有限公司宜昌供电公司,湖北宜昌 443000
- 2. 国网湖北省电力有限公司电力科学研究院,武汉 430077
- 折叠
摘要
Abstract
The long-term operation of insulating part of switchgear cabinet in the humid and hot environment is prone to moisture and reduction of insulation performance,leading to partial discharge and flashover inside the switchgear cabinet and effecting seriously stable operation of the equipment.Aiming at a typical partial discharge fault of bus bushing of 40.5 kV switchgear cabinet after moisture,the insulation performance test of bus bushing with different damage degrees is performed,and the electrical and material properties of the insulating parts before and af-ter baking test are compared.The test results show that the partial discharge,insulation resistance and glass transi-tion temperature can reflect the moisture degree of the bushing.The insulation resistance of the bushing after drying increases from the order of MΩ to 100 GΩ,the partial discharge decreases significantly,the glass transition tempera-ture of the material decreases and different samples increase with the increase of moisture degree.The insulation per-formance of the bushing burned by discharge is damaged,and the degree of moisture can not be reflected by the par-tial discharge but by the insulation resistance and glass transition temperature.The results can provide support for the moisture analysis and diagnosis of the insualtion parts of the switchgear cabinet,and further prove the importance of dehumidification and partial discharge detection of switchgear cabinet to improve the reliable operation of switch-gear cabinet.关键词
开关柜/母线套管/受潮/局部放电/玻璃化转变温度Key words
switchgear cabinet/bus bushing/moisture/partial discharge/glass transition temperature引用本文复制引用
张威,文雅钦,吴传奇,李劲彬,李卫东,张进..40.5kV开关柜母线套管受潮后绝缘性能试验研究[J].高压电器,2024,60(5):214-219,228,7.
