Transformer Winding Deformation Diagnosis Using Middle Band Frequency Response Analysis

The sensitivity of frequency response on different frequency spectrums is analyzed by sensitivity analysis. And more analysis is simulated by computer. Then the relation of transformer parameters´ changing when the winding deformed are figured out by analysis of capacitance and inductance. Furthermore, dependent on the statistics of winding deformation, the probability of different kind of deformations are given. At last, the conclusion is that the middle band frequency response is the most sensitive in the testing of transformer winding deformation using FRA method,.