摘要
针对单相并网逆变器的特定次谐波抑制与控制延时补偿,提出了一种基于状态观测器的准比例谐振Quasi-PR(quasi-proportional resonant)控制加重复控制RC(repetitive control)的复合控制策略。其中,准PR控制器用于实现对并网电流基频分量的无静差控制,重复控制器用于抑制特定次谐波分量。同时,考虑到系统的控制延时,采用状态观测器进行延时估计,并基于状态观测器设计了合适的延时补偿环节。此外,针对LCL的谐振尖峰,进行基于电容电流反馈的有源阻尼。最后通过仿真与实验,验证所提复合控制策略的可行性与有效性。
Aimed at the suppression of specific order harmonic and the control of delay compensation for a singlephase grid-connected inverter,a compound control strategy which combines quasi-proportional resonant(Quasi-PR) control and repetitive control(RC) based on a state observer is proposed.First,the Quasi-PR controller is employed for achieving zero steady-state fundamental frequency error,and the repetitive controller is employed to suppress the specific order harmonic component.At the same time,considering the system's control delay,the delay is estimated using the state observer,and a proper delay compensation link is designed based on the state observer.In addition,for the LCL-type filter's resonance peak,the active damping is realized based on the capacitance current feedback.Finally,the feasibility and validity of the proposed compound control strategy were verified by simulation and experimental results.
作者
梁理程
丁欣
谢李兵
吴德武
陈延明
LIANG Licheng;DING Xin;XIE Libing;WU Dewu;CHEN Yanming(School of Electrical Engineering,Guangxi University,Nanning 530004,China;Guangxi Vocational College of Water Resources and Electric Power,Nanning 530023,China;Guangxi GuiNeng Science and Technology Development Co.,Ltd.,Nanning 530007,China)
出处
《电源学报》
CSCD
北大核心
2023年第4期97-104,共8页
Journal of Power Supply
基金
国家自然科学基金资助项目(51567004)
广西重点研发计划资助项目(AB18126026)
广西高等学校高水平创新团队及卓越学者计划资助项目(桂教人才[2020]6号)。
关键词
并网逆变器
准PR控制
重复控制
状态观测器
THD
gridconnected inverter
quasiproportional resonant(QuasiPR)control
repetitive control
state observer
total harmonic distortion(THD)
