Abstract
This paper presents the modelling of an all-direct-current (all-DC) offshore wind power plant (OWPP) which employs DC/DC high-power converters based on modular multilevel converter (MMC) technology. A coordinated control strategy for such OWPP, designed to maximise the power output and maintain the DC voltages close to the nominal values, is also proposed. With the proposed strategy, wind turbines (WTs) are controlled to provide maximum power output according to a local maximum power point tracking (MPPT) reference signal together with a centralised curtailment signal. The response of the designed 600 MW all-DC OWPP is tested by means of dynamic simulations in MATLAB/Simulink.
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