“小四器”超声波局部放电监测技术的应用

Detection of Partial Discharges in Voltage/Current transformer and Capacitor and Arrestor using Acoustic Emission Techniques

相对于大型电力变压器而言,"小四器"设备的体积大大减小,其中,电流互感器、电压互感器和电容器结构与变压器类似,均为油/纸绝缘结构,因此,"小四器"设备内部局部放电产生的超声波信号易于外部传感器所接收,采用超声波局部放电检测技术具有独特的优势。

In contrast with the large power transformers,the volume of the high voltage electric equipments such as voltage or current-transformer and capacitor and arrestor was fairly smaller.These electric equipments were with oil/paper insulator as power transformers.Therefore,the acoustic signal which was produced by partial discharge（PD） in the equipments could be easily received by the exterior acoustic seusors,and applying of detection of PD in voltage/current-transformer and capacitor and arrestor using acoustic emission techniques had the particular advantages.