基于准PR控制方法的三相光伏并网逆变器研究  

Research on Three-phase Photovoltaic Grid-connected Inverter Based on Quasi PR Control Method

作　　者：王晓晓 李田泽[1] 周冠军 WANG Xiao-xiao;LI Tian-ze;ZHOU Guan-jun(Department of Electrical Engineering,Shandong University of Technology,255049,Zibo,Shandong,PRC)

机构地区：[1]山东理工大学电气与电子工程学院,山东省淄博市255049

出　　处：《曲阜师范大学学报（自然科学版）》2018年第2期73-76,共4页Journal of Qufu Normal University(Natural Science)

基　　金：山东省自然科学基金(ZR2012FL19);山东省高等学校科技计划项目(J15LN31)

摘　　要：光伏并网逆变器的控制方法是实现光伏系统顺利并网的关键.为了提高并网电流的质量,减少并网谐波对电网的干扰,选用LCL型三相光伏并网逆变电路.在并网控制方法上采用基于并网电流和电容电流的准比例谐振(QPR)双环控制方法,同时引入电网电压前馈补偿,并与SVPWM相结合.在MATLAB/Simulink下的仿真结果表明,该控制方法可以实现对基波正弦量的无静差跟踪,提高了系统的稳定性,对光伏并网发电系统的实际运行具有重要意义.The control method of photovoltaic grid connected inverter is the key to realize the smooth grid connection of the photovoltaic system.In order to improve the quality of grid connected current and reduce the interference of grid harmonics to the power grid,LCL type three-phase photovoltaic grid connected inverter circuit is selected.A quasi PR double loop control method based on grid connected current and capacitive current in grid connected control method is used.At the same time,grid voltage feed-forward compensation is introduced and combined with SVPWM.The simulation results under MATLAB/Simulink show that the control method can achieve no static difference tracking of fundamental sine wave and improve the stability of the system.It is of great significance to the actual operation of photovoltaic grid connected power generation system.

关 键 词：光伏并网 逆变器 准PR控制 电压前馈补偿 SVPWM 双环控制 

分 类 号：TM615[电气工程—电力系统及自动化]