暂态过电压检测电力变压器绕组匝间短路故障

变压器在运行过程中，其内部初始故障最终有可能发展成灾难性事故，导致设备停运和电网停电，绕组变形被认为是变压器内部的最主要的故障之一。利用变压器运行时遭受过电压信号冲击的特性，提出利用暂态过电压可实现绕组变形故障的在线检测。首先，介绍了该方法的基本原理，在此基础上搭建了验证性试验平台，进行了匝间短路故障模拟试验。试验结果表明，该方法在一定程度上可实现绕组匝间短路故障的检测，具有一定的参考价值。

Detecting Shorted Turns Failure on the Windings of Power Transformer by Transient Overvoltage

The initial faults inside transformer would eventually develop into catastrophic failure during its operation, which could result in the outage of equipment and entire network. Winding deformation is considered to be the most common faults inside transformer. As power transformer is under the impact of overvoltage during its operation, the method of transient overvoltage could be used to realize online detecting transformer winding deformation is proposed in this paper. Firstly, the basic principle of this method is developed, then a verifying test platform is set up, and the simulation test of shorted turns failure is completed. The test result shows that the proposed method could realize detecting shorted turns failures of transformer winding to a certain extent, and this method has a certain reference value. .