Research On 10 KV Distribution Network Of High-reliability Power Supply Mode In The Center Of Ningbo

The importance and necessity of power grid mode selection become increasingly prominent,with Ningbo center city expanding rapidly rising,and a large supply of high reliability requirements.The selection of power supply mode plays an important role in the construction and development of distribution network.Research on 10 kV distribution network of high-reliability power supply mode in the center of Ningbo, In this study, I establish a distribution network evaluation system power supply mode, selecte a number of representative sample, using comparative evaluation methods of typical structure and typical area, evaluation of two modes of double loop network in the construction of the scale, investment, power grid construction, operation and other differences, explore the Ningbo medium voltage distribution network power supply mode. Finally, the research results are applied in the center of Ningbo City Jiangdong actual distribution network construction and transformation, after the transformation in Eastern metro power supply reliability rate can be up to 99.9995%.Practice has proved that using high reliability as the starting point of the research about the power supply mode of the medium voltage distribution network can improve the efficiency of equipment utilization, and further enhance the reliability of power supply. The research results can be applied to the Ningbo central city power grid, which has a high flexibility and practicality, and has a strong promotion value to the same kind of urban power grid.