摘要
为了研究组合电器(GIS)典型绝缘缺陷局部放电信号的超声波特性,在一段110kV GIS试验段上,设计和模拟了GIS中的母线金属尖刺缺陷、筒壁金属尖刺缺陷、悬浮电位缺陷、盆式绝缘子内部气泡缺陷、自由金属颗粒缺陷等5种典型局部放电模型和铁心电磁振动模型,使用超声波法对其放电和振动信号进行检测。结果表明,不同缺陷的局部放电或超声信号在幅值、相位特征、相位分布(PRPD)谱图特征等方面会呈现不同的特点,为缺陷的模式识别提供了试验依据。
For analyzing the partial discharge ultrasonic wave characteristic of typical defects in SF6 gas insulation switchgear （GIS）, a 110 kV GIS is taken as an object to design typical partial discharge models, namely point electrode model, floating electrode model, air interstice model in insulator and metal particle and iron core electromagnetic shock model for GIS. Experiments using ultrasonic method to detect PD signals for different defects thus have been implemented. The experimental results show that the ultrasonic signals of different defects have different characteristics in waveform, amplitude and phase resolved partial discharge chart, which is helpful in PD pattern recognition for GIS.
出处
《江苏电机工程》
2015年第2期10-14,共5页
Jiangsu Electrical Engineering
关键词
组合电器
典型绝缘缺陷
局部放电
超声波特征
gas insulation switchgear （GIS）
typical defects
partial discharge
ultrasonic wave characteristic
