With the increasing penetration of wind power in power systems, it has become challenging for traditional generation units alone to meet frequency regulation requirements. Therefore, wind power must be capable of coordinating with traditional power sources to jointly regulate system frequency. Based on the fast frequency response of wind power and the sustained regulation capability of thermal units, a coordinated primary frequency regulation strategy dominated by thermal units and supported by wind power is proposed. To account for the operational differences among wind turbines within a wind farm, a power distribution strategy based on a margin factor is proposed to effectively harness the frequency regulation potential of each turbine while ensuring safe operation. Meanwhile, a persistent reserve power re-distribution strategy for grouped wind turbine operation is developed. This strategy pre-schedules a small number of wind turbines to operate in overspeed mode with a low de-loading rate. When frequency-regulating wind turbines withdraw from frequency support, the de-loaded turbines compensate for the resulting energy deficit according to a differentiated energy allocation scheme based on an inverse rotor-speed factor. This approach effectively mitigates the secondary frequency dip (SFD). Simulation results demonstrate that the proposed strategy enables coordinated primary frequency regulation between wind and thermal units, fully exploits the frequency regulation capability of wind power, and significantly improves system frequency response performance while maintaining economic efficiency and reliability.