In view of the problem that the traditional independent pitch PI control of wind turbines has poor load reduction performance and is difficult to select control parameters. In this paper

the NREL 5 MW wind turbine is taken as the research object

and an independent pitch PI control parameter and active damping gain optimization method based on the improved sparrow search algorithm are proposed. Firstly

based on the blade root load and blade tip acceleration

an independent pitch active damping control strategy model was established. Secondly

the PI control parameters and active damping gain were initially set by orthogonal experimental method

and in order to realize the coordinated optimization of PI control parameters and active damping gain

with the goal of reducing the asymmetric loads and stable power of the unit

the PI control parameters and active damping gain of independent pitch were optimized based on the improved sparrow search algorithm （ISSA）. Finally

the results are compared with the results of traditional independent pitch control

independent pitch active damping control and independent pitch active damping control based on the sparrow search algorithm （SSA）. The results show that the independent pitch active damping control strategy with optimized control parameters by improving the sparrow search algorithm can better mitigate asymmetric loads of wind turbines and make the output power more stable.