Survey of Frequency Response Analysis on Winding Deformation of Transformers

As a core equipment in power system, power transformer plays a vital role in the stability of the power grid. It is necessary to quickly and accurately monitor the fault of the transformer. Frequency response method is an important method for fault diagnosis of transformers. It has many advantages, such as simple and light test equipment, easy measurement and high test sensitivity, intuitive analysis of experimental maps, and comparability of data magnitude analysis. It is considered to be a detection method with good application prospects. In this paper, the monitoring principle of frequency response method and the influencing factors in practical application are analyzed, and the shortcomings of the method and the research direction of the next step are prospected.