Study on 3-Phase PWM Rectifier Controlled by Direct Power

Abstract

Based on the analysis on shortcomings of controlling strategies of direct power on the traditional 3-phase Boost-type PWM Rectifier through space vectors, a new controlling strategy is proposed in this paper. With this new strategy, the space vector is divided into 12 basic space vectors to form a new switching table. The instantaneous power controlling technology is realized through the control of instantaneous active power and reactive power by choosing the best switching state of PWM Rectifier. This new controlling strategy can put the input side unit power into operation, improve the efficiency of power and reduce harmonics of the input current. The effectiveness and feasibility of this controlling strategy have been justified through the simulation and experiment.

Power Feedward Strategy of Grid-Connected Inverter Based on Direct Power Decoupling

“…Improve anti-jamming capability grid voltage drop is an important issue of grid inverter. Literature [4] proposed current feedforward control strategy can effectively suppress current perturbation, but not effective to stabilize the power disturbance. Literature [5] sacrifices power factor method to achieve system disturbance rejection.…”