电力变压器局放超声传感器及其应用

作者研制成一种带光纤的电力变压器局放超声PZT传感器.文中分析了它的灵敏度与宽频带特性,介绍了原理、结构设计、实验数据及现场成功实例.理论与实验研究表明:具有这种高灵敏传感器的超声定位系统是确定电力变压器绝缘故障部位的一种方法.

The Ultrasonic Sensors for Monitoriing Local Discharge in Power Transformer and its Application

In this paper the ultrasonic PZT ceramic sensors for monitoring local discharge in power transformer with optic fiber have bean developed. The properties of the piezoelectric ceramic sensors with high sensitivity and wide band are analysed. The principle, structure design: experiment Property and successful example for on-line are given. The result of theoretical and experimental investigation show that, the ultrasonic location system with the new type high sensitivity sensors will be an excellent method to locate point of insulator faiture in power transformer.