LCL单相光伏并网逆变器有源阻尼离散域分析  

Analysis of Active Damping of LCL Filter Used in Single-phase PV Inverter in Discrete Domain

作　　者：张宁云[1] 唐厚君[1] 姚辰[1] 

机构地区：[1]国家能源智能电网研发中心、上海交通大学,上海200240

出　　处：《电力电子技术》2015年第8期9-11,共3页Power Electronics

摘　　要：对LCL型单相光伏并网系统采用内环阻尼控制外环并网电流控制的双环控制策略,在离散域内建立了单相光伏并网逆变器与LCL滤波器构成的系统模型,在此基础上以劳斯判据为准则,推导出使开环系统极点稳定的内环阻尼控制系数范围,通过奈奎斯特图分析了外环电流控制器参数对于系统稳定性的影响。A double loop control scheme：active damping control in inner loop and injected current control in outer loop is adopted.The mathematical model of the single-phase PV inverter with LCL filter is established in discrete do- main.Based on the Routh criterion, the range of the damping factor of the inner loop is derived to guarantee the open-loop system do not have unstable poles.The impact of the current controller parameters on the stability of the whole system is explained through Nyquist diagrams.

关 键 词：滤波器 双环控制 稳定性 

分 类 号：TN713[电子电信—电路与系统]