Research On Comprehensive Evaluation System Of Urban Distribution Networks

The position of distribution network in power system is increasing with the development of economic and social of China, as well as the expansion of the power grid construction. Distribution networks construction level influence the power quality of customers, and also the key to reducing consumption. As China's urban distribution network is still exists many problems in development and construction, how to guide the distribution network construction efficiently is paid a lot attention to. So it's great essential that researching on the distribution networks development level and building a reasonable and effective comprehensive evaluation system which can analysis the weak links existed in distribution networks.As the result, Comprehensive evaluation system of urban distribution network which could be widely used is proposed to solve the problem emerging from present evaluation system which is lack of a evaluation system which can be used to compare high and middle voltage distribution network laterally. The main work is as following:(1) Considering the need of power network stakeholders, key factors of power network construction are analyzed by fishbone diagram, and analysis hierarchy process is used to construct the comprehensive evaluation index system which completely reflect the construction contents and characteristics of distribution network;(2) The weights of index are given by Delphi so unified standard of weights can be constructed(3) Delphi is also used to find the relation between index value and evaluation score, and smooth index score function which fits the construction feature is obtained by setting index evaluation criterion and curve fitting to it. So far the comprehensive evaluation system is formed.By evaluating nine urban distribution networks, this comprehensive evaluation system is verified to reflect the development level of distribution networks. Different urban distribution networks can be compared with each other to find the strength and weakness, which can lay a foundation for distribution networks planning, construction and development.