In order to improve the consumption of wind power and reduce the abandoned wind rate, a closed loop control system based on wind-fire coordination (Hereinafter referred to as a closed loop control system) is studied in this paper. The system can set different intervals according to the load rate of transmission cross-section, and adopt different control strategies in each interval. In the premise of ensuring the safety and stability of the cross-section, the capacity of wind power utilization will be improved as much as possible. When the cross-section is overloaded, the thermal power is reduced as much as possible, and the wind power is reduced appropriately. Due to the lack of effective forecasting technology for wind power, the wind power generation capability is estimated according to whether the wind is tracking the last command. At the same time, in the aspect of system reliability, the system has increased the check of instruction error proofing and automatic switching of control modes. In order to ensure that the instruction will not make a big impact on the system, and not cause new security and stability problems, all constraints can be checked before the instruction is sent. When the system is abnormal, the wind power automatically tracks the new energy system or manual control, and the thermal power automatically tracks the Optimal Planning System (OPS) or manual control to ensure the safe and stable operation of the power grid. Finally, the effectiveness and practicability of the system are verified by the practical application in Shanxi Power Grid. This work is supported by National Key Research and Development Program of China (No. 2018YFB0904500) and Key Research and Development Program of Ningxia (No. TZZD/NZC180152C).