Study Wavelet Transformation method detection and space voltage vector compensation in the APF

In order to meet the demand of harmonic current detection and compensation of active power filter in power system of oil production platform. The paper proposes the harmonic current detection method based on the Wavelet Transformation so that it can analyze any harmonic well. the simulation and experiment show that this detection method has the double resolutions in the both time & frequency domains, it has the fast dynamic response speed and the good accuracy. For the compensation control strategy of APF, firstly, this paper builds the mathematical model of the three phases and wires parallel active power filter and then it studies the basic PWM control principles of the space voltage vector. The simulation and model machine experiment results show that the space voltage vector PWM control strategy has the best compensation effect.