基于准比例谐振积分与重复控制的光伏并网逆变器研究  

Study on photovoltaic grid-connected inverter based on quasi-PRI and repetitive control

作　　者：杨苹[1,2] 郑远辉[1] 许志荣[1] 梁平生[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]华南理工大学广东省绿色能源技术重点实验室,广东广州511458

出　　处：《可再生能源》2015年第7期993-998,共6页Renewable Energy Resources

基　　金：国家高技术研究发展"863"计划(2014AA052001);广东省战略性新兴产业核心技术攻关项目(2012A032300001);南沙区科技计划项目(2013P005)

摘　　要：光伏逆变器并网控制策略的性能直接影响输出电能质量。文章针对谐振控制策略存在的不足,提出准比例谐振积分控制和重复控制的复合控制方法,准比例谐振控制器实现对基波正弦电流的无静差跟踪,重复控制器作为谐波补偿器抑制电网低次谐波,积分控制器消除低频直流的干扰,分析其稳态误差。仿真及实验结果表明,该控制方案能有效抑制谐波,具备良好的动态和稳态性能。PV grid-connected inverter control strategy performance directly affects the output power quality. A hybrid control method that combines quasi-proportional resonant integral（PRI） control and repetitive control is proposed to overcome the shortage of resonant control in this paper. The QPR controller is designed as a zero-tracking-error controller for fundamental frequency, the repetitive controller is designed as a harmonic compensation to suppress low frequency harmonics and the integral controller is designed to eliminate low-frequency interference of DC. The steady-state error is analyzed in this paper. Finally, some simulations and experiment results prove the control strategy can greatly reduce harmonics, and has an excellent dynamic and steady-state performance.

关 键 词：并网逆变器 谐振控制 重复控制 

分 类 号：TM615[电气工程—电力系统及自动化]