中国电机工程学报2017，Vol.37Issue(10)：2944-2954,11.DOI:10.13334/j.0258-8013.pcsee.160900
LCL型并网逆变器重复双闭环控制方法
Repetitive-based Dual Closed-loop Control Approach for Grid-connected Inverters With LCL Filters
摘要
Abstract
High steady-state control accuracy,fast dynamic response performance and strong robustness are crucial for grid-connected inverters with LCL filters.However,the traditional single-repetitive control method has poor dynamic performances.The inverter-side current feedback based repetitive dual-loop control method and the grid-side current feedback based single-loop PI control method have large ripples and low steady-state accuracy.Consequently,the repetitive dual closed-loop control strategy based on grid current feedback was proposed in this paper.The LCL filter was stable due to effective ntilization of inherent one-beat delay of digital control.Based on the inner closed-loop transfer function,the corresponding notch filter,the second-order filter and lead-link were designed as a compensator of repetitive control.The gird voltage and current reference feed-forward control suppressed grid disturbance and increased dynamic tracking performances.Theoretical analysis and experimental results show that,the proposed method has the advantages of high steady accuracy,fast dynamic response and strong robustness.关键词
并网逆变器/LCL滤波器/重复控制/双闭环控制/谐波抑制Key words
grid-connected inverter/LCL filter/repetitive control/dual closed-loop control/harmonic suppression分类
信息技术与安全科学引用本文复制引用
江法洋,郑丽君,宋建成,任鸿秋,田慕琴..LCL型并网逆变器重复双闭环控制方法[J].中国电机工程学报,2017,37(10):2944-2954,11.基金项目
国家自然科学基金项目(U1510112,51577123) （U1510112,51577123）
山西省留学归国人员择优资助重点项目(2015).Project Supported by National Natural Science Foundation of China (U1510112,51577123) （2015）
Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province (2015). （2015）
