Urban power distribution network reconstruction scheme evaluation method

Abstract

The invention provides an evaluation method of an urban power distribution network reconstruction scheme. The method includes: establishinga distribution network reconstruction scheme comprehensive evaluation index system comprising indexes such as reliability, power supply capability, economy, DG admitting capability, disaster resistance capability, adaptability and coordination and a quantitative calculation method of each index; solving subjective and objective weights of each index by using an interval intuitionistic fuzzy analytic hierarchy process and a CRITIC method; and obtaining a comprehensive weight in combination with a minimum information identification principle, solving a comprehensive evaluation value of each transformation scheme in combination with TOPSIS, selecting an optimal transformation scheme according to a principle that the comprehensive evaluation value of the scheme is maximum, and handing over the optimal transformation scheme to related workers in the technical field for implementation. The index system constructed by the method is concise and easy to calculate, the overall performance of the distribution network reconstruction scheme can be comprehensively reflected from different angles, and the obtained evaluation result is high in identification degree, so that the decision result is more practical and credible, and has higher engineering application value.

Description

technical field [0001] The invention belongs to the field of power distribution system transformation, and in particular relates to an evaluation method for a transformation scheme of an urban power distribution network. Background technique [0002] With the abundance of electricity load and the improvement of the quality requirements of power supply, the urban distribution network has become one of the key factors restricting the economic and social development of our country. At the same time, the DG whose penetration rate is gradually increasing, that is, the distributed power generation, brings higher requirements on the structure and performance of the urban distribution network. [0003] At this stage, the plans for the transformation of urban distribution networks can be summarized into three aspects: upgrading AC distribution lines, adopting medium-voltage DC power distribution, and increasing the penetration rate of distributed power. Each transformation plan has i...

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Problems solved by technology

There are two main difficulties in the comprehensive decision-making research of the distribution network transformation plan including DG. One is that there is no basis for judging whether the configuration of distributed power in the distribution network is reasonable, and the other is that the impact of future load types and proportion changes is not considered. In addition, the fuzziness and uncertainty of the decision-maker's preference are not fully considered in the evaluation result method, and the subjective and objective information in the decision-making is not fully utilized, which makes the evaluation result subject to great subjective influence.

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