Regarding PMSG-based wind turbine generation system, this paper proposes a supercapacitor energy storage unit (SCESU) which\nis connected in parallel with the DC-link of the back-to-back converter to enhance its high voltage ride through performance.The\nanalysis of the operation and control for the grid-side converter and SCESU are conducted. Based on real time digital simulators\n(RTDS), a model and a Hardware-in-the-Loop (HiL) platform of PMSG-based wind turbine with SCESU is developed, and the\nsimulation results show that the SCESU absorbs the imbalanced energy and the grid-side converter absorbs inductive reactive\npower during the period of voltage swell and verify the correctness and feasibility of the high voltage ride through control strategy.
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