Abstract: Token the harmonic wave generated by power supply system of mine dc winder as the research target, harmonic wave treatment and reactive power compensation were done on power network by adopted dynamic detection and inhibition methods of harmonic.The harmonic characteristics were simulated by MATLAB and dynamic detection and inhibition simulation of harmonic were done.The results indicate that this method could test the harmonic in power supply system of hoist timely, and could inhibit harmonic effectively.Through the treatment by active filter, general aberration rate of harmonic of hoist system reduced to around 1% and power factor closed to 1.

Key words: MATLAB, Harmonic, Hoist