基于暂态波形的变压器故障诊断方法分析

Analysis of Transformer Fault Diagnosis Method Based on Transient Waveform

变压器是电力系统中最重要的电气设备之一。在整个电气系统中扮演重要角色,安全运行对总体电力系统的安全稳定运行产生直接影响。研究和制定新的变压器维护体系对于发展电力系统具有非常重要的意义。而对变压器产生故障时各电气量暂态变化的认识是开发新的保护方案的前提,甚至可以直接通过某电气量暂态波形的变化推断出哪类故障即将发生或是已经发生。本文将分别介绍变压器最常见的两类故障,即浪涌涌流、内部故障,并给出出现这两类故障时的电流暂态波形,以及如何通过波形诊断故障的发生。

Transformers are one of the most important electronic devices in power systems.It plays an important role in the entire power system,and safe operation has a direct impact on the safe and stable operation of the overall power system.It is very important to research and develop new transformer protection systems to develop power systems.The understanding of the transient change of each electrical quantity when the transformer is faulty is the premise of developing a new protection scheme.It can even be inferred directly from the change of the transient waveform of an electrical quantity that the fault is about to occur or has occurred.The three most common faults of the transformer,namely surge current and internal fault,will be introduced separately,and the current transient waveforms when these two types of faults occur will be given,and how the fault can be diagnosed by the waveform.