The adjustment of HVDC tie-line power can promote the consumption of wind power. However, the reactive power control equipment will act frequently when tie-line power changes, which will reduce the service life of it and increase the probability of fault. The optimization model of HVDC tie-line power considering reactive power control equipment action times is established, which describes reactive power characteristics by the static operation model of converters, and considers the constraints for AC power flow, stepwise operation of tie lines and action times of reactive power control equipment. The mixed integer nonlinear programming problem is decomposed based on benders decomposition method, and the reactive power deviation penalty and the link constraints are established, which realize the unified values of reactive power control equipment between master problem and sub-problems. A case study is carried out based on the wind power export equivalent system, verifying the model can improve the benefits of coordinated optimization.