MOA overvoltage protection power equipment fault warning technology
Online monitoring of metal oxidation arrester in power system was studied,and leakage current characteristics were an-alyzed as a means to warn equipment failure.Before the fast Fourier change of harmonic analysis,the harmonic analysis is improved by selecting appropriate window function and increasing the number of sampling points in the frequency domain.Through Simulink simu-lation,the working state of 110kV MOA is effectively simulated.The experiment shows that the improved harmonic analysis method improves the accuracy of frequency and phase prediction.The predicted value of fundamental frequency is 50.03049Hz,which is close to the actual value of 50Hz.The results show that this method can improve the accuracy of MOA fault warning.
万方数据
维普
