It has been difficult for the traditional power grid planning to meet the requirements of the safety for large － scale wind power system． To solve this problem，the information of wind power output is fully exploited using big data technology， and the quantitative analysis of wind power fluctuation risk is achieved． On this basis，the source － network － load coordinated planning model is established taking maximum wind power penetration and minimum grid － connected risk as the object，and game theory is applied to the twin goals of bargaining to solve it． Finally，taking a power system with wind power in the northwest region for example，the correctness of the proposed coordinated generation planning method based on big data of electricity metering is verified．