GIS中典型缺陷局部放电的超声波检测

为了研究超声波法在GIS中局部放电检测中的应用,在实验室以一段220 kV电压等级的GIS母线腔体为试验对象,设计和模拟了GIS中典型的局部放电模型,使用超声波方法对其放电信号进行检测。实验结果表明,不同缺陷类型的超声信号在波形、幅值和PRPD图上会呈现出不同的特点,通过对GIS腔体不同位置的检测,可以精确的定位出缺陷位置。研究表明,超声的方法在检测GIS局部放电信号时有较好的灵敏度和精确的定位,检测结果为今后对GIS局部放电模式识别提供了试验依据。

Ultrasonic Detection of Partial Discharge on Typical Defects in GIS

For detecting partial discharge of SF6 gas insulation switchgear(GIS) with the ultrasonic method,a 220 kV GIS bus bar cavity was taken as an object to design and simulate the typical partial discharge models in GIS.PD signals on different defects were thus detected with the ultrasonic method.The experimental results indicated that the ultrasonic signals of different defects showed different characteristics in waveform,amplitude and phase resolved partial discharge chart.The PD source could be accurately loc...