单相光伏并网逆变器解耦控制策略研究

Research on Decoupling Control Strategy of Single Phase Photovoltaic Grid-connected Inverter

三相并网解耦控制和空间矢量脉宽调制(SVPWM)能够很好控制输入电网功率的有功和无功分量,调节并网功率因数,提高并网质量,提高直流母线电压的利用率,因此将三相并网解耦控制和SVPWM技术应用于单相光伏并网逆变器的控制中。通过逆变器输出真实和虚拟电流实现功率解耦,并给出单相SVPWM的原理和实现方法。实验结果表明,所设计解耦控制策略能够实现对逆变器功率因数有效控制、且动态性能良好,验证了该控制策略的可行性。

Active and reactive component of input power can be controlled well by decoupling control and space vector pulse width modulation （SVPWM） of three-phase grid-connected,and adjust power factor,improve quality of grid-connected,improve the utilization rate of DC bus voltage,so power decoupling control and SVPWM of three-phase grid were applied to inverter control of single-phase photovoltaic grid.Realize power decoupling through the real and virtual current,and single-phase SVPWM principle and realization method were given.The experimental results show that：based on the current decoupling and SVPWM technology,the inverter has high power factor,good dynamic performance,verifies the feasibility of the control strategy.