摘要
研究了多有源电力滤波器(APF)系统在弱电网下的谐振问题。由于弱电网下存在电网阻抗,并联系统中APF通过公共节点电压相互耦合,产生谐振。首先结合公共节点电压以及网侧电流间的相互关系,得到APF并联系统的传递函数矩阵。针对该传递函数矩阵,分别在LCL滤波器相同和不同参数情况下,对弱电网下APF并联系统的谐振特性展开分析,进而引入虚拟电阻型有源阻尼方法抑制系统谐振。最终搭建仿真和实验平台对研究结果进行了验证,证明了该方法的正确性和优越性。
It focuses on the resonance problem of multiple active power filter(APF)system in weak grid.Since in this case the grid impedance cannot be ignored,APFs in the system are coupled with each other through voltage for point of common coupling.And it usually causes resonance between APFs.Firstly the transfer function matrix of APF parallel system is obtained by considering the relationship of grid side current,line impedance and voltage for point of common coupling.For the transfer function matrix with same or different parameters for LCL filters,the resonance characteristics of parallel APF system under weak grid is analyzed.And it is shown that the resonance of the system can be suppressed by virtual resistance active damping.Finally,a simulation and experimental platform is built to verify the research results,which proves the correctness and superiority of this method.
作者
杨华
YANG Hua(Jiangsu Chenwu Jieneng Technology Ltd.,Jingjiang 214500,China)
出处
《电力电子技术》
CSCD
北大核心
2022年第4期72-75,共4页
Power Electronics
基金
国家自然科学基金(61963030)
江西省自然科学基金(S2019QNZD2B0113)。
