摘要
气体绝缘组合电器设备(gas insulated switchgear,GIS)因具有占地面积小、可靠性高等优点在电力系统获得了广泛应用。GIS设备在制造或安装过程中可能在高压导体产生金属尖端缺陷,进而在运行过程中产生局部放电,持续的局部放电会导致绝缘击穿,影响设备运行。针对GIS高压导体金属尖端缺陷局部放电特性,文中在实体GIS高压导体上设置了不同长度的金属尖端缺陷,利用超声波法对其从局放起始到绝缘击穿整个过程中的局放信号进行了测量,结果表明,随着电压的升高局放过程可分为局放起始阶段、局放相位转换阶段、局放发展阶段及临界击穿阶段,不同长度的缺陷其发展阶段类似,但其局放起始电压及放电强度不同。
Gas insulated switchgear（GIS） may contain metal point defect on high-voltage conductors during manu- facturing or installation, and the defect may cause partial discharge （PD）during GIS operation. Continuous PD may lead to insulation breakdown and affect equipment operation. Aiming at the PD characteristics of metal point defect on GIS high-voltage conductors, this study set metal point defects of different lengths on the high-voltage conductors of a real GIS. The PD signals from initial discharge to insulation breakdown were measured by the ultrasonic method, and the results show that with the increase of voltage, the PD process can be divided into PD initial stage, PD phase conversion stage, PD development stage and critical insulation breakdown stage. The defects of different lengths have similar development stages, but their PD inception voltages and discharge intensities are different.
作者
史文
杨正理
黄其新
陈海霞
陆朱卫
吴馥云
SHI Wen;YANG Zhengli;HUANG Qixin;CHEN Haixia;LU Zhuwei;WU Fuyun(Sanjiang University,Nanjing 210012,China)
出处
《高压电器》
CAS
CSCD
北大核心
2018年第11期80-85,共6页
High Voltage Apparatus
基金
江苏省高校自然科学研究面上项目(17KJB470011)资助~~
