Abstract:Distributed power generation (DG) is a power generation device that is compatible with the environment, utilizes clean energy to generate electricity, and can meet the special needs of users for electricity. Therefore, connecting distributed power sources to the power grid can not only ensure the safe operation of the grid, improve power supply reliability, but also feed back excess power to the grid. After distributed generation is connected to the distribution network, it may not reduce the network loss of the distribution system and improve the stability of the grid. It may also cause adverse effects on the grid because the planning scheme of grid connection is not well designed. Therefore, the planning of distributed generation connection to the distribution network is particularly important. In the grid connection planning of distributed generation, the most important thing is to select the access location and capacity of distributed generation. Therefore, this article selects a differential algorithm with advantages such as simple structure, easy execution, high optimization efficiency, simple parameter setting, and good robustness. By establishing the system and simulating it with Matlab, the optimal position is selected, the optimal capacity is calculated, and the optimal objective function is obtained to achieve the optimal planning and design.