Research on Reliability Improvement of Power Grid Based on 10kV Distribution Line Cross City Interconnection

In the distribution network of China’s power system, due to the large power supply area, insufficient distribution of substations and difficulty in land acquisition, the network structure of 10kV lines is not very complete, with the problems of single amplitude radiation, no power supply, and no backup. In order to improve power supply reliability, this paper effectively solves the problem of the power supply reliability of long-distance power supply lines in remote mountainous areas by establishing connections across cities. Through the self-healing technology of the distribution network, high reliability returns with small investment and low cost have been achieved.