广东电力2017，Vol.30Issue(1)：126-130,5.DOI:10.3969/j.issn.1007-290X.2017.01.024
一起500kV电容式电压互感器电容击穿故障分析
Analysis on Breakdown of 500 kV Capacitor Voltage Transformer
王斯斯 1刘宇 1熊俊 1杨森 1何彬彬 1老洪干 1钟少泉1
作者信息
- 1. 广州供电局有限公司,广东广州510410
- 折叠
摘要
Abstract
In allusion to one case of breakdown of capacitor elements inside the capacitor voltage transformer (CVT) in one 500 kV substation in Guangzhou,disassembling inspection was conducted on the faulted CVT,and scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) were used for analyzing microscopic characteristics of materials.By theoretically analyzing relationship between breakdown numbers of capacitor elements and capacitance change rate and secondary voltage change rate,secondary voltage of 500 kV CVT was proposed to be increased by 1 V or reduced by 2.5 V for being taken as the warning threshold so as to promoting timeliness of prejudgement for CVT insulation state.关键词
电容式电压互感器/高压电容/分压电容/二次电压/电容元件Key words
capacitor voltage transformer/high voltage capacitor/voltage-dividing capacitor/secondary voltage/capacitor element分类
信息技术与安全科学引用本文复制引用
王斯斯,刘宇,熊俊,杨森,何彬彬,老洪干,钟少泉..一起500kV电容式电压互感器电容击穿故障分析[J].广东电力,2017,30(1):126-130,5.
