Analysis of connection modes characteristics for typical distribution networks with high reliability

Distribution network is one part of electric grid which is closest to users. The structure of distribution network is one of the key factors that determine the level of distribution of power quality. Reasonable distribution network not only meet the power grid security and reliability requirements, but also make a huge social and economic benefits. Analysis of the structure of distribution network has great significance on power grid development and reconstruction. This paper summarized the excellent distribution network structure of domestic and foreign urban power grids, also discussed the typical grid structure characteristic of these urban middle-voltage distribution network.