Wind power DC collection system can effectively solve the harmonic resonance problems of AC collection system, and the series-parallel topology can effectively reduce the system cost compared with other structures, so it is very important to study the stable operation control of series-parallel wind power DC collection system. Based on the coupling characteristics of series port voltages, the rotor and energy storage coordinated control strategy (RES-CCS) is proposed to solve the overvoltage problem caused by wind speed fluctuation during steady operation of the wind turbine. Firstly, the operating characteristics of the series-parallel wind power DC collection system and the shortcomings of the existing overvoltage control strategy are analyzed. Then, the series port voltage limit is studied. The RES-CCS method is used to clamp the series port voltage within the limit value, and the energy storage capacity of the required super capacitor is designed. Finally, a series parallel wind power DC collection system model is built in the PSCAD/EMTDC simulation platform, and RES-CCS is simulated and verified. The results show that the overvoltage control method proposed in this paper can reduce the abandonment loss and the energy storage capacity of the wind turbine, and improve the wind energy utilization rate and operation economy of the wind turbine.