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

The doubly-fed induction generator (DFIG) wind farm is collected and transmitted through line-commutated converters (LCC) high-voltage DC transmission. Such transmission system easily incurs the stability issue but the dynamics is still incompletely analyzed. This paper develops the sequence impedance model for the overall transmission system including DFIG wind farm and LCC-HVDC, by which the harmonics between AC side and DC side can be accurately retained. Finally, the impedance model is verified by the time-domain simulation in Matlab/Simulink.