Improved fuzzy comprehensive evaluation selection method and system for charging facility access point, and medium

Abstract

The invention discloses an improved fuzzy comprehensive evaluation selection method and system for a charging facility access point, and a medium. The method comprises the following steps: determining an index system; the influence indexes are converted into Vague value data; constructing an index layer fuzzy evaluation matrix based on a Vague value; carrying out weight calculation on the basis of the value; calculating a fuzzy comprehensive score of the time period tau; and calculating a fuzzy comprehensive score considering the time sequence weight. According to the method, the index values and the initial weights are represented by the vague values, the schemes are selected based on the Vague value similarity, the relevance between the indexes is fully considered, the ranking of the scores of the access schemes is obtained by comparing the similarities between the candidate schemes and the ideal schemes, and support is provided for selection of the charging facility access points. Besides, the comprehensive evaluation process is perfected from a time sequence perspective, time sequence weights are set based on a typical charging station load curve and artificially divided charging time periods, and weighted combination is carried out on evaluation results based on the time sequence to obtain a corrected comprehensive score.

Description

technical field [0001] The invention belongs to the technical field of connecting charging facilities to a power grid, and in particular relates to an improved fuzzy comprehensive evaluation and selection method, system and medium for access points of charging facilities. Background technique [0002] Before charging facilities are connected to the power grid, they need to submit an application for industrial expansion to the local power grid company. In the process of industrial expansion and installation, the power grid company will determine the installation capacity, access method, optimal access point, line direction and so on of charging facilities. The access of charging facilities will have an impact on the distribution network. The charging of a large number of electric vehicles will cause heavy line load, increased network loss, heavy overload of transformers, harmonic pollution, three-phase imbalance and other problems. safety, reliability, etc. In addition, the...

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Problems solved by technology

On the one hand, the above literatures all assume that the selected evaluation indicators are independent of each other, without considering the possible correlation between the indicators; The time-series changes of the loads of the network are obtained only for a certain period of time.

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