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Sequence Impedance Modeling of DFIG Wind Farm via LCC-HVDC Transmission

The DFIG wind farm is generally collected and delivered through line-commutated converters (LCC) high-voltage DC (HVDC) transmission, which has the unexplored stability problem. The sequence impedance model is constructed for the overall LCC-HVDC system including DFIG wind farm, by which the harmonics transfer between AC side and DC side can be accurately retained. Finally, the developed model is verified by the time-domain simulation in Matlab/Simulink.