摘要
针对三相LCL型并网逆变器,研究了基于比例谐振(PR)控制以及电网电压前馈控制的电容电流与电网电流双闭环控制策略,并分别与网侧电流反馈和逆变器侧电流反馈控制策略进行了对比分析。采用s域和z域根轨迹方法分析PR控制器参数的选取以及不同延时对系统稳定性的影响。最后,仿真和实验结果验证了理论分析的正确性和控制策略的可行性。
A dual current-loop control strategy which combines the capacitor current,grid-side current feedback and grid voltage feed-forward compensation strategy which based on the proportional resonant（PR） control is analyzed for the grid-connected inverter based on LCL-topology.The grid-side current feedback and inverter current feed-back control strategy are compared with the dual current-loop control strategy,separately.The influence of PR controller parameters and the effect of different control delay on system stability is presented.Finally,the proposed control strategy is verified by the experimental results.
出处
《电力电子技术》
CSCD
北大核心
2016年第2期66-68,共3页
Power Electronics
基金
国家自然基金(51307015)
输配电装备及系统安全与新技术国家重点实验室(2007DA10512713405)~~
关键词
逆变器
滤波器
比例谐振
inverter
filter
proportional resonant control
