To address the limitations that the current decoupled frequency and voltage control strategies at new energy stations may not fully meet the safety and stability requirements, this paper proposes a coordinated voltage and frequency control technology that leverages the adjustable resources and control capabilities of regional multiple new energy stations. First, a coordinated control system architecture is introduced. Based on distributed autonomous responses at each station, an additional centralized control layer is incorporated to enhance the dynamic stability of system voltage and frequency. Second, a system identification method is employed to dynamically correct system parameters dispatched by the control center and to estimate the equivalent active power imbalance at the grid connection point. Based on this, a control model for frequency and voltage at grid connection point is developed. The control model is then utilized to calculate a coordinated control strategy for the stations, enabling integrated management of active power-frequency and reactive power-voltage to ensure real-time stability and security of the active support system. Finally, the effectiveness of the proposed active-reactive coordinated control method is validated through simulation on a representative two-area system.