Modelling and resonance analysis of wind power integration via flexible HVDC considering wind speed and wind farm location

摘要

Field experience has shown that harmonic resonance may occur in wind farms integration through a flexible HVDC transmission system. The impact on resonance characteristics from wind speed and length of the connection line from wind farm to flexible HVDC converter station is studied in this paper. First, the system model of wind farm integration through flexible HVDC system is established, including the whole structure of electrical model, control structures of converters and the impedance measurement model. Then, the effect of the line length and wind speed on the impedance characteristics of interconnected system is analyzed, and the aggregated RLC circuit approach is used to evaluate the risk of potential resonance quantitatively. Finally, the simulation results on the RT-LAB platform validate the theoretical analysis.