中国电力2026，Vol.59Issue(1)：115-123,9.DOI:10.11930/j.issn.1004-9649.202408046
基于LCL型光储并网逆变器侧电流反馈的有源阻尼策略
Active damping strategy based on current feedback for LCL-type grid-connected inverters with PV-storage systems
摘要
Abstract
With the continuous rise in photovoltaic(PV)penetration,the problem of inherent resonant frequency offset of LCL filters caused by PV-storage grid-connected systems has become increasingly prominent,which has evolved into a key bottleneck restricting the stable operation of the systems.An inverter-side current feedback active damping(ICFAD)strategy is proposed.Firstly,the small-signal transfer function of the inverter connected to the grid via the LCL filter under this strategy is established.Secondly,the fmincon function is adopted to search for the optimal damping factor of the transfer function.Finally,the optimal parameters of the active damping controller are designed based on the search results.This strategy can effectively suppress the shifted resonant peaks of the system while overcoming the limitations in solving the characteristic roots of the third-order systems.Simulation results demonstrate that the proposed control strategy exhibits resonant suppression performance under different short-circuit ratios of the power grid,thus effectively improving the operational stability of PV-storage grid-connected systems.关键词
光储逆变器/有源阻尼/谐振抑制/逆变器侧电流反馈/电网强度Key words
PV-storage inverter/active damping/resonance suppression/inverter-side current feedback/grid strength引用本文复制引用
RAN Chengke,TAN Lu,CAO Zhihui,ZHAO Xiaoyue,LI Zhenrong,XIA Xiangyang..基于LCL型光储并网逆变器侧电流反馈的有源阻尼策略[J].中国电力,2026,59(1):115-123,9.基金项目
This work is supported by Hunan Provincial Natural Science Foundation Project(No.2022JJ60053). 湖南省自然科学基金项目(2022JJ60053). （No.2022JJ60053）
