电力系统保护与控制Issue(12)：44-50,7.
基于准PR调节器电流双闭环LCL三相并网逆变器控制
Control strategy of three-phase LCL grid-connected inverter based on quasi-PR adjuster
摘要
Abstract
The effective control of grid-connected inverters under complicated network situation is very important for the practical value. A dual-closed-loop control strategy based on grid-side current closed-loop and capacitor current closed-loop is proposed. Compared to conventional PI controller, it can ensure the system's speed, stability, unity power factor operation and good robustness during grid faults. Capacitor current inner-loop feedback control can suppress the LCL filter resonance peak, grid current outer-loop control based on stationary coordinate system needs no current decoupling, and the control algorithm is simple, quasi-proportional-resonant (QPR) has limited gain at the fundamental frequency, won’t cause system instability, and is capable to resist the grid frequency fluctuations. The advantages of this control strategy is analyzed, and effectiveness is validated by simulation.关键词
LCL 滤波器/双闭环控制/准比例谐振控制Key words
LCL filter/dual-closed-loop control/quasi-PR control分类
信息技术与安全科学引用本文复制引用
雷亚雄,李建文,李永刚..基于准PR调节器电流双闭环LCL三相并网逆变器控制[J].电力系统保护与控制,2014,(12):44-50,7.基金项目
国家自然科学基金项目(51277072)；中央高校基本科研业务费专项资金项目This work is supported by National Natural Science Foundation of China (No.51277072) and Fundamental Research Funds for the Central Universities （51277072）
