GIS悬浮局部放电的超声波现场检测典型应用

Field Application of Ultrasonic Detection on GIS Suspended Partial Discharge

本文通过分析悬浮局部放电的放电机理,结合已有的实验室超声波测量结果,将其分为均匀电场型和不均匀电场型悬浮放电,并给出了两者的超声信号特点。针对一次典型的悬浮局部放电现场检测,验证了分类方法的可行性,分析了超声波传播路径的衰减特征,证明了超声波检测对于GIS局部放电检测的适用性,为未来广泛开展GIS带电检测和在线监测提供了理论基础和现场经验。

By analyzing the discharge mechanism of suspended PD and the ultrasonic measurements in laboratory,the suspended PD is divided into uniform field and non-uniform field.The characteristics of ultrasonic signals of the two classes are provided.According to a typical field detection on GIS suspended PD,the feasibility of the classification on suspended PD is verified.The attenuation characteristic of ultrasonic wave propagation path is analyzed.The applicability of ultrasonic detection for GIS PD detection is demonstrated.The theoretical basis and field experience can be provided for developing the live detection and online monitoring of GIS in future.