In order to suppress power fluctuation of renewable energy integration

a coordinated operation control strategy of multi-terminal DC transmission based on voltage source converter(VSC-MTDC)is proposed which is suitable for pumped storage station and renewable energy generation system. The strategy can adjust the operation speed and schedule power output of pumped storage based on the DC voltage fluctuation of VSC-MTDC system before the integration of renewable energy generation system by DC transmission system

so that the deviation between the forecasted output and actual output is decreased. The impact of power fluctuation for renewable energy output on AC system is reduced. A four terminal VSC-MTDC system composed of pumped storage station

wind farm

photovoltaic station and AC grid is built for simulation. The results verify the efficiency of proposed control strategy.