光伏发电三电平并网逆变器的LCL滤波器分析与设计  

Analysis and Design of an LCL Filter Based on a Three-level Grid-connected Inverter for Photovoltaic Generation

作　　者：孙向东[1] 安少亮[1] 张琦[1] 任碧莹[1] 曹先贵[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《电气传动》2013年第6期29-33,共5页Electric Drive

基　　金：陕西省教育厅产业化培养项目(2012JC17);陕西省重点学科建设专项基金

摘　　要：中点钳位三电平并网逆变器正在越来越多地被应用于新能源发电系统中,为更好地减小并网电流谐波,LCL滤波器因其优越的滤波性能也获得了广泛的应用。对于LCL滤波器的谐振峰问题,常用的控制算法包括无源阻尼控制和有源阻尼控制,有源阻尼控制由于克服了无源阻尼控制所存在的能量损耗缺点,逐渐成为研究热点。针对三电平并网逆变器拓扑结构以及基于电容电流反馈的有源阻尼控制策略,深入讨论了LCL滤波器参数的设计方法,实验表明所研究的滤波器设计方法是正确可行的。The neutral-point-clamped （NPC） three-level inverter is used more and more in the grid-connected renewable energy generation system. In order to achieve the lower current harmonic, LCL filter is also widely utilized due to its superior filtering performance. Passive and active damping control are studied to solve the resonant problem appearing in an LCL filter, active damping control overcomes the weakness of power loss existing in the passive damping method, thus it gradually becomes one of research focus. According to the feature of the NPC three- level grid- connected inverter and active damping method based on feedback control of the capacitor current, design method of the LCL filter was thoroughly discussed, experimental results show that the filter design method is right.

关 键 词：LCL滤波器 参数设计 有源阻尼控制 中点钳位三电平并网逆变器 

分 类 号：TM464[电气工程—电器]