摘要
超声波局部放电检测法是检测气体绝缘组合电器(GIS)绝缘状况的重要手段。对GIS进行超声波法局部放电检测时,现场会遇到机械振动、外部电晕干扰和磁致噪声这三种典型的干扰,这三种干扰与放电特征图谱相似,极易对检测人员造成误判。结合现场实测经验,分析了三种典型干扰的信号特征,提出了现场干扰的判别及排除方法。文中提出的干扰辨别及排除方法在现场超声波局放带电检测中取得了良好的效果。
Ultrasonic partial discharge detection is widely used to detect partial discharge （PD） of the gas insulation switchgear. Three kinds of typical interference signal about PD signal of GIS, mechanical vibration, corona interference, hysteresis noise are described in the passage. The character graph of interference is similar to that of the typical partial discharge. The characteristics of three kinds of interference signal are analyzed, such as frequency-characteristic, continuous mode graph and the phase mode graph. Different identification applications are analyzed in this passage. Identification methods about typical interference signal are effectively used in field ultrasonic measurements of GIS.
作者
冯新岩
赵廷志
杨承龙
许永鹏
FENG Xinyan;ZHAO Tingzhi;YANG Chenglong;XU Yongpeng(State Grid Shandong Electric Power Maintenance Company,Jinan 250021,China;Department of Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《高压电器》
CAS
CSCD
北大核心
2018年第10期241-245,共5页
High Voltage Apparatus
关键词
局部放电
超声波法
机械振动
电晕干扰
磁致噪声
partial discharge
ultrasonic method
mechanical vibration
corona noise
hysteresis noise
