Vector Decoupling Controlled PWM Rcetifier for Wind Power Grid-Connected Inverter

Abstract

In this paper, On the basis of analyzing the model of three-phase PWM rectifier for wind power grid-connected inverter, the mathematical model of the vector decoupling controlled PWM rectifier at three-phase synchronous rotating coordinate system is deduced. This paper proposes a novel vector decoupling control strategy, which consists of two control loop, i.e. outer voltage loop and inner current loop. It can realize decoupling control of active current and reactive current, thus the active power and reactive power can be regulated independently. PI regulators are used in voltage and current loop to achieve no static error control. Experimental results prove that the proposed rectifier has the satisfactory control performance, and it can achieve approximate unity power factor correction. The experiments also show that the efficiency of proposed rectifier is high, the reliability is well and its application is wide.