Three-phase active power filter based on space vector and one-cycle control

In this paper, a three-phase active power filter based on space vector and one-cycle control was proposed. According to the ideal of space vector, the three-phase voltage is divided to six regions. In each region, the model of one-cycle control is established. The proposed control method has some advantages, such as it only needs to detect the three-phase electrical power's voltage, current, neutral current, and DC side capacitance voltage of APF. It eliminates the multipliers and the calculating of harmonics and reactive current is not need. The proposed controller needs only one integrator with reset, three comparators, two flip-flops and some linear components. In each region one leg works under low frequency and other two legs work under high frequency. The proposed controller is simple, robust, reliable, and high efficiency. The one-cycle belong to nonlinear and unified constant-frequency control method, so it has features of high precision, effective compensation, and desirable for industrial applications. The analysis, modeling, and simulations are carried out with the three-phase active power filter. The simulation results verify that the proposed three-phase three-legs active power filter can dynamically and effectually compensate the harmonics, reactive and zero sequence current.