Delay-Dependent Stability of Single-Loop Controlled Grid-Connected Inverters with LCL Filters

  title={Delay-Dependent Stability of Single-Loop Controlled Grid-Connected Inverters with LCL Filters},
  author={Jianguo Jack Wang and Jiu Dun Yan and Lin Jiang and Jiyan Zou},
  journal={IEEE Transactions on Power Electronics},
LCL filters have been widely used for grid-connected inverters. However, the problem that how time delay affects the stability of digitally controlled grid-connected inverters with LCL filters has not been fully studied. In this paper, a systematic study is carried out on the relationship between the time delay and stability of single-loop controlled grid-connected inverters that employ inverter current feedback (ICF) or grid current feedback (GCF). The ranges of time delay for system stability… CONTINUE READING
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