基于LLCL滤波器的SAPF电流控制方法研究  

Research on SAPF Current Control Based on LLCL Filter

作　　者：汪玉凤[1] 孙晓鹏[1] 刘存国[2] 戴宇飞 

机构地区：[1]辽宁工程技术大学,电气与控制工程学院,辽宁葫芦岛125105 [2]国网辽宁省电力有限公司阜新供电公司,辽宁阜新123000 [3]天津电气科学研究院有限公司,天津300399

出　　处：《电力电子技术》2016年第7期34-35,73,共3页Power Electronics

摘　　要：为了抑制并联有源电力滤波器(SAPF)并网产生的高频开关纹波,提出一种基于LLCL并网滤波器的SAPF。LLCL是一种在传统LCL滤波器的电容支路串联一个小电感的滤波器,该LLCL滤波器能在系统开关频率处产生串联谐振,达到吸收开关频率处高次谐波的效果,进一步减小网侧电感值。由于LLCL是一种高阶滤波器,采用并联RC无源阻尼方法抑制谐振峰,该方法简单、易于实现。同时为提高SAPF补偿的灵活性,提出基于比例谐振(PR)控制器的选择性补偿电流控制策略并分析了系统开环稳定性。实验结果验证了该方法的正确性。To suppress high frequency switching ripple of the shunt active power filter（SAPF） which connected to the grid, a SAPF is proposed based on LLCL fiher.LLCL is a filter which is realized by inserting a small inductor in the branch of the capacitor of LCL filter to generate a series resonant circuit at the switching frequency to achieve the effect of absorbing high frequency harmonics at the switching frequency.Since the LLCL is a kind of high-order power filter, there is also a problem of resonant peak, an design method of parallel RC passive damper is used for suppress- ing resonant peak,the method is simple and easy to implement.In order to improve the flexible of compensation of compensation, selective harmonics compensation control strategy based on proportional resonance （PR） controller and open-loop stability of system are analyzed.Experimental results verify the correctness of the proposed method.

关 键 词：有源电力滤波器 并联 开关纹波 

分 类 号：TM713[电气工程—电力系统及自动化]