LCL型有源电力滤波器并网电流控制研究  

Research on grid-connected current with LCL-filters

作　　者：魏学良[1] 宫瑞冰[1] 王举[2] 

机构地区：[1]中国石油大学(北京)地球物理与信息工程学院,北京102249 [2]中原油田分公司天然气处理厂,河南濮阳457162

出　　处：《工业仪表与自动化装置》2013年第2期109-112,共4页Industrial Instrumentation & Automation

基　　金：中国石油大学(北京)基金资助(KYJJ2012-05-34)

摘　　要：APF的控制关键就是对输出电流及直流侧电压进行控制,L,LC型并网的并网电流由于开关频率受限,并网电流含有较大的开关频率附近的谐波电流,同时滤波电感过大导致设备体积大,成本高,并影响并网控制的动态性能。LCL型滤波器有着更好的效果,该文就LCL型滤波器PI控制的稳定性,内电感电流跟踪特性,并网电流跟踪特性和电网电压抑制特性进行了深入研究,得出了并网指标对闭环根频率的技术要求。Out - put current and DC voltage are the key factors of APF control. L and LC type grid -connected current contain more harmonic current around switching frequency, owing to the switching frequency limitation, besides, larger filtering inductance will make the equipment bigger, cost higher, and influence the grid control dynamic performance. However, the LCL filters can achieve better per- formance. So the analysis of PI controller stability, the inner - inductance current tracking characteris- tics,grid -connected current tracking characteristics and grid voltage suppression characteristics in dead zone for LCL type filters are researched in this paper, then concludes the requirements of grid index on the closed -loop root frequency.

关 键 词：有源电力滤波器 电感电流 并网电流 闭环根频率 

分 类 号：TM76[电气工程—电力系统及自动化]