Study of Improving Hysteresis Control Method of the Coal Mine Active Filter

To meet the requirements of coal mine substation at the integrated and dynamic compensating harmonic motion needs the accurate and real-time compensation of transient and distortion current in power system,based on the conventional control method of hysteresis current,a improving hysteresis current control method is put forward to further improve the speed and accuracy of current tracking and reduce the switching losses by increasing the compensation of input voltage.Through theoretical analysis and simulation comparison,the improving method is verified to improve the filtering performance of active filter.