基于复合控制器的并网光伏逆变器控制系统  

The control system of grid-connected photovoltaic inverter based on composite controller

作　　者：牛中伟[1] 赵莉华[1] 陶振伟[2] 梁勇[1] 傅伟[1] 何祥龙 雷晶晶[1] 

机构地区：[1]四川大学电气信息学院 [2]中国人民解放军92337部队48分队

出　　处：《可再生能源》2014年第7期939-943,共5页Renewable Energy Resources

摘　　要：文章在分析PI控制器和准PR控制器特性的基础上,提出了一种准PR+PI的复合控制器,设计了一种新型两级式并网光伏逆变器控制系统。在该控制系统中,电流内环采用准PR控制器实现正弦参考量无静差跟踪,电压外环采用复合控制器实现直流量无静差跟踪,该控制系统在Simulink下仿真结果表明:新型双环控制系统可以使系统高功率因数运行,实现了对基波正弦量的无静差跟踪,有效抑制母线电压二倍频分量对并网电流的影响,提高并网电流质量。Characteristics of PI controller and quasi-proportion resonance controller are analyzed, a composite controller is put forward based on quasi-PR controller and PI controller. Then a new type two-stage grid-connected photovoltaic inverter control system is designed, in which quasi-PR controller achieves zero steady-state error of the sinusoidal reference in the current inner loop; the composite controller achieves zero steady-state error of DC in the voltage outer loop. Finally,the simulation results show that new double loop control system can keep the system operating in high power factor, realizes zero steady-state error of the fundamental sinusoidal component, effectively inhibits the impact of double harmonic components from voltage bus on grid-connected current, improves the current quality.

关 键 词：准PR控制 并网逆变器 母线电压 PI控制 

分 类 号：TM615[电气工程—电力系统及自动化]