Abstract:As the economy in China shifts from a high-speed growth stage to a high-quality development stage, the whole society is increasingly dependent on electricity, and users have put forward higher requirements for power supply reliability. Based on the analysis of the network connection of complex distribution network, a simplified method for transforming a complex distribution network with branch feeders into a typical wiring model is proposed. Based on a detailed analysis of the reliability indicators of the system, a power supply reliability algorithm based on typical wiring modes is proposed. And the simulation verification is carried out based on the distribution network model of an urban area. Simulation results show the effectiveness of the proposed algorithm.