Passivity-Based Stability Analysis and Damping Injection for Multiparalleled VSCs with LCL Filters

  title={Passivity-Based Stability Analysis and Damping Injection for Multiparalleled VSCs with LCL Filters},
  author={Xiongfei Wang and Frede Blaabjerg and Poh Chiang Loh},
  journal={IEEE Transactions on Power Electronics},
This paper addresses the harmonic stability resulting from the current-control interactions of the multiparalleled, LCL-filtered voltage-source converters. First, an alternative impedance model is proposed for the single-loop current control. The control output admittance of the converter is decomposed into a passive filter output admittance in series with an active admittance, which is dependent on the current controller and the time delay. The frequency-domain passivity theory is then applied… CONTINUE READING
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