A combined reactive power control strategy for permanent magnet direct-drive wind turbine and distributed hybrid energy storage system is proposed. Firstly

the reactive power regulation capability of the permanent magnet direct-drive wind turbine and energy storage system is analyzed

and it is determined that both the wind turbine and energy storage system can participate in reactive power regulation through converter control.Secondly

the reactive power control strategy is put forward

which is presented in terms of signal reception

initial allocation

and internal allocation. In initial allocation

the equal margin allocation method is adopted. In internal allocation

the proportional allocation with the priority output of energy storage is considered. Finally

the effectiveness of the strategy is verified by simulation

it shows that the power grid voltage can be supported by fully utilizing the reactive capacity of the wind turbine and energy storage system.