Optimization of Medium Voltage Distribution Network Structure Based on Total Supply Capability Improvement

Total supply capacity (TSC) is an important evaluation index in distribution network evaluation, and the main measures to improve the TSC of a distribution network are to increase feeders and transformers. This paper improves TSC by optimizing the distribution network structure. Firstly, several typical distribution network power supply modes in China are analysed and their distribution network structures are simplified, including substation structures and feeder connection structures. Secondly, according to different distribution network structures., a certain optimization method is determined. This paper adopts three methods, namely exhaustive method., finite scene optimization method and reasonable judgment comparison method., to determine the specific distribution network connection schemes and the “N-1” transfer schemes. Finally, structures of several examples are optimized, and their TSCs are calculated. Through the comparison analysis, the effectiveness of the distribution network structure optimization methods proposed are verified.