空间矢量直接电流控制三相并网逆变器的研究

研究了一种基于空间矢量调制的三相并网逆变器的控制策略,该系统能够以单位功率因数向电网回馈电能。首先建立了两相同步旋转坐标系下逆变器的数学模型,在此基础上给出了基于空间矢量调制的网侧电流闭环控制策略,实现了并网电流有功分量和无功分量的独立控制,并给出了电网电压矢量跟踪的实现方法和电流环的设计。仿真和实验结果均表明,采用该控制策略可以改善并网电流质量,实现高功率因数并网。

Research on Three Phase Grid-connected Inverter Based on Space Vector PWM Current Control

A three phase grid-connected inverter with space vector PWM current control is presented,which can return power to the grid with unity power factor.The model of the inverter is built in the two-phase rotating reference frame,the control principle is proposed based on the space vector PWM current control,which makes the grid current into the active current and reactive current.The grid voltage vector tracking method and the design of current loop are given.Both simulative and experimental results verify that...