可再生能源2016，Vol.34Issue(8)：1151-1158,8.
基于双二阶广义积分锁频环的光伏并网发电系统仿真研究
Simulation of PV grid-connected generation system based on double second-order generalized integral frequency-locked loop
摘要
Abstract
Negative sequence and harmonic components of PV power generation system had an important influence on phase locked-loop and control algorithm of grid-connected inverter under grid asymmetrical fault.Based on the above problems,in order to extract positive-negative sequence components of grid voltage and grid-connected current and detect the synchronization signal of grid voltage,this paper proposed a double second-order generalized integrator frequency-locked loop (DSOGI-FLL) technology with adaptive filtering.And the technology was introduced into the positive-negative sequence dual current control strategy.The method of optimizing phase-locked loop in unbalanced control strategy improved the whole control system's ability of PV grid-connected inverter to cope with gird asymmetric fault.The grid-connected PV power generation system based on DSOGI-FLL was simulated by using Matlab/Simulink software.The results showed thatThis method contributes to eliminate the 2 harmonic wave of active power and restrain the harmonic component of grid-connected current under grid asymmetrical fault.关键词
光伏并网逆变器/锁频环/不对称故障/负序分量/谐波分量Key words
PV grid-connected inverter/frequency-locked loop/asymmetrical fault/negative-sequence component/harmonic component分类
能源科技引用本文复制引用
张占锋,樊艳芳,王一波,王环..基于双二阶广义积分锁频环的光伏并网发电系统仿真研究[J].可再生能源,2016,34(8):1151-1158,8.基金项目
国家自然科学基金项目(51467019). （51467019）
