【摘要】 比例谐振(PR)控制器能够在静止坐标系下对交流信号实现无静差控制,将此控制器应用于分布式发电系统中并网逆变器。采用电网电压定向的矢量控制和PR控制,实现了d轴和q轴电流的解耦控制以及功率任意可调。对静止坐标系下的PR控制器进行了静态和动态实验。最后,对电网电压不平衡时PR控制器的三相并网逆变器进行了实验,并与同步旋转坐标系的PI控制策略进行对比实验。实验结果表明:采用PR控制器的三相并网逆变器有很好的静、动态性能和抗电网电压不平衡能力。更多还原

【Abstract】 As PR(Proportional Resonance) controller achieves zero steady-state error for AC signal in stationary reference frame,it is applied to the three-phase grid-connected inverter of distributed generation system.The grid voltage oriented vector control and PR control are adopted to realize the decoupled control of d-axis current and q-axis current and the adjustable power factor.The static and dynamic experiments are carried out in stationary reference frame for PR controller.The control strategy of PR controller is tested for three-phase grid-connected inverter under unbalanced grid voltage and compared with the control strategy of PI controller in synchronously rotating reference frame.Experimental results show that,the three-phase grid-connected inverter with PR controller has better steady / dynamic performance and higher ability against grid-voltage unbalance.更多还原