不平衡电网下模块化APF分序并联控制策略  

Modular APF Separation Sequence Parallel Control Strategy under Unbalanced Power Grid

作　　者：付子义[1] 董彦杰 FU Ziyi;DONG Yanjie(College of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学电气工程与自动化学院

出　　处：《电力系统及其自动化学报》2020年第1期79-85,共7页Proceedings of the CSU-EPSA

基　　金：国家重点研发计划专项资助项目(2016YFC0600906)

摘　　要：针对不平衡电网下大容量谐波补偿,提出一种模块化有源电力滤波器APF分序并联的控制策略。采用两个子模块组成一个大的功率单元,两个子模块一个采用正序电压和电流控制,补偿正序谐波;另一个采用负序电压和电流控制,补偿负序谐波。在谐波的检测上采用指定次谐波多同步旋转坐标检测方法,并对滤波环节加以优化,降低了谐波电流采样延时。搭建了Matlab仿真模型,仿真结果表明不平衡电压下负载电流谐波得到很好地抑制,验证了该控制策略的可行性。Considering the large-capacity harmonic compensation under unbalanced power grid,a control strategy of modular active power filter(APF)separation sequence parallel is proposed.Two sub-modules are used to form a large power unit:one uses positive-sequence voltage and current control to compensate for positive-sequence harmonics,while the other uses negative-sequence voltage and current control to compensate for negative-sequence harmonics.In the detection of harmonics,the specified sub-harmonic multi-synchronous rotating coordinate detection method is adopt⁃ed,and the filtering link is optimized to reduce the sampling delay of harmonic current.A simulation model is built us⁃ing Matlab,and simulation results indicate that the load current harmonics under voltage imbalance are well sup⁃pressed,which verify the feasibility of the proposed control strategy.

关 键 词：电压不平衡 模块化 有源电力滤波器 分序并联 环流抑制 

分 类 号：TM76[电气工程—电力系统及自动化]