Optimization method for electric distribution network contract structure for improving power supply capacity

The invention belongs to the field of power distribution system optimization planning, relating to an optimization method for an electric distribution network contract structure for improving power supply capacity, the optimization method comprises the following steps of: (1), building a power supply capacity calculating module of an electric distribution system for calculating main transformer overload and contact capacity constraint; (2), compiling the power supply capacity calculating module; (3), using the power supply capacity, number of main transformer contact channels and total length of region contact channels as an objective function to build an optimization model based on a multi-objective main transformer contact structure; (4), adopting genetic algorithm to achieve the optimization for the electric distribution network contract structure. The optimization method can satisfy the load growth requirements on the condition of trying not to add sites and occupying fewer corridors, and can completely i