Abstract: Due to a variety of electrical equipment using, the grid power quality severely polluted. For current harmonic signal mine hoist converter generates, the methods is proposed based on Hilbert-Huang Transform (HHT) to detect current harmonic signal and improved Active Power Filter. The simulation mode Established by MATLAB / Simulink software about shunt APF+SPWM inverter hybrid active filter device for harmonic motion detection and suppression simulation. The results show that this design method can detect harmonic of hoist converter real-time and compensate the system current , and also can suppress harmonic validly.

Key words: hoist converter, improved HHT, improved Active Power Filter, shunt APF+SPWM inverter, harmonic analysis