Reliability Evaluation Of Power Distribution System And The Optimal Setting Of Distribution Terminal Based On Curve Of Component Failure Rate

Now,with the development of science and technology,the progress of the industry,the rapid increase of the urban population and the promotion of the market economy,the reliability of distribution network and the optimal setting of distribution terminals have been paid more attention.In order to accurately assess the reliability of distribution network and improve the efficiency of power distribution terminal setting,in this paper,the failure rate bathtub curve is considered in the analysis of distribution network.The main work is as follows:Firstly,it is to recommend the failure rate and reliability,analyze the common failure rate model,study the structure of the failure rate curve,select the weibull distribution to establish element failure rate curve which is adopted segmental combination.Secondly,study distribution network reliability evaluation which is considering the failure rate curve considering distribution network element failure characteristics,considering the component failure rate characteristic of distribution network,analyzing the distribution network reliability data standard andthe distribution network reliability cost,it is based on the up-stream delivering and down-stream merging of reliability indices of distribution system reliability evaluation method that the reliability of the distribution network is evaluated.Thirdly,Considering the component failure rate curve,based on the combination of qualitative analysis and quantitative calculation,the optimization method of distribution terminal is proposed.Considering distribution network failure rate curve of components,discuss the model of distribution terminal optimization,analysis the distribution terminal and communication design principle,analysis the typical features of the distribution network,it is adopt qualitative analysis to optimize the power distribution terminal setting;since then,adopt the method of quantitative calculation to verify the reliability of the power distribution terminal whether meet the requirements.At last,through case analysis,the correctness and effectiveness of this method is verified.Through a part of the city distribution network in China,based on Matlab programming calculation,based on the failure rate curve of distribution network reliability assessment and the optimal allocation of the power distribution terminal,the results verify the correctness of the proposed method in this paper.