Research And Application Of Evaluation Index System Of Distribution Network Planning

With the development of the electric companies will gradually take the construction of the centertransfer to the distribution network construction, power distribution network planning become be a key link to bulid a safe, reliable and economic operationelectrified wire netting.The result analysis ofdistribution network planning is the core of power distribution system evaluation,bulid a scientific, reasonable and practical the result analysisfordistribution network planning effectiveness evaluation index system can become an important basis for the feasibility of the plan,has the important meaning of authenticity and validity of data and the results of the analysis for distribution network planning.City distribution network has the characteristics of complicated structure, large amounts of basic data,etc,leads to low accurancyfor analysing on the present situation of power grid.Evaluation of the traditional distribution system more around the quality itself, the lack of analysis on the planning scheme and the results compared to the status of power grid.In this paper, analysis some theories related to the result of analysis ofdistribution network andsystem evaluation,From the point of view of the need of distribution networkstakeholders,According to the distribution network power supply,reliability and economy, puts forward an evaluation index system of current situation and the evaluation method of the quantitativeof power and grid planning.With the widespread implementation of the China State Grid Corp "urban distribution network operation level and power supply capability evaluation guide" and "economic evaluation of urban distribution network" are the underlying index from the power supply capacity, economy and others,application of combination of methods to analyze the current power grid vulnerability, specific suggestions from the line contact rate,etc,and according to the planning of network by using the index system,according to the analysis results can directly reflect the degree of network optimization.This paper selects the distribution network in a city of Jiangxi Province as an example,demonstration of the distribution network planning effectiveness evaluation index systemcan reflect the rationality of distributionnetworkplanning.The calculation results show that the distribution network planning, performance evaluation system to fully grasp the influence factors of the characteristics of network planning,from the overall to describe the advantages and disadvantages of planning, and has high application value.The grid stakeholders demand as the basis, to build a more comprehensive distribution network planning effectiveness evaluation index system,from three aspects of supply capacity, reliability and economy to effect evaluation of power grid planning.On the basis of comprehensive evaluation, points out the shortcomings of the grid, compared with the planning network evaluation results, provide auxiliary analysis for power grid planning workers.