Abstract:In the current distribution network planning, the existing planning is unreasonable, the data processing effect is not good, and the system fault diagnosis efficiency is low. In order to improve the planning level of the distribution network, this paper combines the background of big data in the application of power system to propose power. The application of big data in distribution network planning, and analyze the application effect of power big data in distribution network planning. The application of power big data in distribution network planning is of great significance. It can realize the accurate processing of power distribution data, accurately evaluate the power grid status, and provide technical support for the optimization of distribution network structure. In the specific application process, power big data should be used in active distribution network data scheduling, active distribution network data planning management, distribution network voltage data planning management, and grasp the technical points to rationally carry out distribution network planning. The practical application shows that the power big data can meet the needs of distribution network planning, and can improve the data information processing effect and system fault diagnosis efficiency of the power distribution system.