摘要
介绍了目前几种典型的直流注入抑制方法,分析了它们在采用LCL型滤波器光伏并网系统中的适用性。利用PR控制器可无静差地跟踪交流参考量、PI控制器可无静差地跟踪直流参考量的特性,提出一种基于比例谐振(PR)与比例积分(PI)联合控制的并网逆变器直流注入控制策略,以消除并网电流中的直流分量。采用MATLAB/Simulink进行仿真研究,结果表明,与PR控制器相比,PR与PI联合控制方法可以有效抑制光伏并网系统注入电网的直流分量。
Several typical DC injection suppression methods are introduced and their applicability to the PV （PhotoVohaic） system based on LCL filter is analyzed. In order to eliminate the DC component of grid- connected current,an integrated control strategy is proposed,which adopts the PR（Proportional Resonant） controller to track the AC reference and the PI（Proportional Integral） controller to track the DC reference, without any static error. Results of simulative study with MATLAB/Simulink show that,compared with the PR controller,the PR ＆ PI integrated control strategy effectively suppresses the DC component of grid- connected current by PV system.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第3期118-122,共5页
Electric Power Automation Equipment
基金
中央高校基本科研业务费专项资金资助项目(12MS26)~~
关键词
直流注入
联合控制
滤波器
光伏并网系统
控制
DC injection
integrated control
electric filters
grid-connected PV system
control
