Research And Application Medium Voltage Distribution Network Planning Of City Downtown

Distribution network is the nearest power grid to the users. The grid structure,power supply reliability of the power grid, the quality of power supply, power supply, etc should be reflected through the distribution network,the rationality of the network structure is one of the key factors in deciding the power quality. Power grid planning, an important part of the power system’s overall development plan, is also the basis of power grid construction and renovation. Power grid planning goal is aimed to adapt the development of the power grid, advance the economic and social development needs, and play a key part in power grid construction, operation and power supply security.The thesis is completed on the basis of the research ‘in the low voltage distribution network in G city rolling plan’. Based on the specific situation of the power system on G regional economic and social development, moreover,combined with G city cities and development plan, the paper selects the medium voltage distribution network planning as the research object. It analyzes the status quo and existing problems of the power grid, power demand forecasting,power balance and capacity than the check. On the basis of this research, the power grid planning are put forward and main conclusions are as follows:1.Collecting and analyszing basic datum of planning districts.According to the condition and economic and social development, detailed analysis was carried out on the G medium voltage distribution network. And the existing question was shown in this paper.2,Combing with the social development plan,the existing questions in medium voltage distribution network of G city were classified and graded.And the solution were made.3, Power load forecasting. the 2020 G city area for medium voltage distribution network are used for maximum load forecasting growth ratio coefficient method and the spatial load forecasting method to predict. In addition,the results of two kinds of forecasting method are confirmed and checked with each other.4,On the basis of the predicting results of power load in G city,along with the truss transition plan is put forward of medium voltage distribution network.5,Finally, regarding the distribution network construction quantities in G city from 2013 to 2017 as the object of the research,the investment estimation and benefit evaluation was made and get expecting effect.