Research on the Improvement of HHT Algorithm in the Analysis of End Effect in Power System Harmonic Process

With the rapid development of modern industry, the high power thyristor converter circuit, power electronic rectifier, converter module and other nonlinear loads are widely used, resulting in the harmonic problem in the power grid which is becoming more and more serious. Based on three typical features of the analysis method of harmonic comprehensive comparison on the inhibition by adaptive waveform matching extension method for end effects of HHT algorithm, the feasibility and effectiveness of the improved algorithm is verified by the comparison of analog signals before and after using the improved algorithm results.