电测与仪表2018，Vol.55Issue(6)：16-22,29,8.
LCL型三相光伏并网逆变器新型控制策略研究
Research on new control strategy for three-phase PV grid-connected inverter with LCL-type
摘要
Abstract
LCL filter type grid-connected inverter is a high-order multi-variable control system,while the traditional grid-connected current single control method cannot ensure system stability well and better improve the quality of gridconnected current.A novel composite current control technology based on LCL type grid-connected inverter is proposed.In this paper,the characteristics of LCL filter are analyzed in detail,LCL filter has resonant peaks in resonant frequencies,the active damping of the LCL filter is realized by adding the notch filter in the current loop to improve the stability of the system without the need of additional sensor.The repetitive control (RC) and quasi-proportional resonance control (QPR) are combined by the grid-connected current regulator to improve the dynamic response speed of the system and reduce the influence of local nonlinear load disturbance and grid voltage frequency fluctuation on the quality of the grid-connected current,achieve non-static error tracking control of fundamental signal and unit power factor grid-connected.The correctness and validity of the active damping of the notch filter and repetitive QPR complex control strategy are verified by Matlab/Simulink simulation test.关键词
并网逆变器/LCL滤波器/陷波器/重复控制/准比例谐振控制Key words
grid-connected inverter/LCL filter/notch filter/repetitive control/quasi proportional resonance control分类
信息技术与安全科学引用本文复制引用
王金强,王思华..LCL型三相光伏并网逆变器新型控制策略研究[J].电测与仪表,2018,55(6):16-22,29,8.基金项目
国家自然科学基金资助项目(51567014) （51567014）
中国铁路总公司科技研究开发计划项目(2016J010-C) （2016J010-C）
