电力变压器冲击试验故障诊断方法的研究

Research of Fault Diagnosis in Impulse Testing of Power Transformers

针对变压器冲击试验,提出了中性点电流法、传递函数法和联合时频分析法等3种故障诊断方法。结合具体实例,分别用3种不同的方法对电力变压器进行故障诊断,其中着重介绍了联合时频分析法。通过对3种方法的优缺点进行分析比较,认为联合时频分析法是最先进、准确性最高的方法,具有良好应用前景。

Against transformers impulse tests, the paper presented neutral point current, function of transmission and joint time-frequency analysis methods for fault discrimination. Specific examples of, respectively, using three different methods of power transformers for fault discrimination, which highlights the joint time-frequency analysis. Through analysis of the advantages and disadvantages of three methods comparison, joint time-frequency analysis is considered to be the most advanced and highest accuracy of the method and has good prospects for applications.