Black-start scheme evaluation method based on fuzzy entropy weight

Abstract

The invention discloses a black-start scheme evaluation method based on fuzzy entropy weight, and belongs to the field of power supply management. When each black-start scheme is evaluated, combiningthe entropy weight of each evaluation index with the subjective weight of the expert to obtain a comprehensive weight; respectively standardizing according to the cost type indexes and the benefit type indexes to obtain an evaluation matrix; constructing a fuzzy evaluation matrix by the standardized evaluation matrix; performing fuzzy operation on the comprehensive weight and the fuzzy evaluationmatrix to obtain a fuzzy subset; and normalizing the fuzzy subset to obtain a fuzzy comprehensive evaluation result, and sorting the black start schemes by utilizing the evaluation result. According to the technical scheme, when the weights of the evaluation indexes are considered, objective data are processed through the entropy weight method and then combined with preference judgment of expert experience, the evaluation indexes of all the black-start schemes are fuzzified within a reasonable range, and objectivity of an evaluation result is enhanced while project subjectivity is considered.The method can be widely applied to the fields of power grid operation adjustment and emergency management.

Description

technical field [0001] The invention belongs to the field of power grid regulation and control operation in power supply management, and in particular relates to a method for selecting the best scheme among various black-start schemes to realize rapid restoration of power supply of the system. Background technique [0002] With the increasing scale of joint development of power grids in various regions of the power system, if a local fault occurs in the system, it may cause a large-scale power outage due to inadequate protection and protection measures, and may even endanger the stable operation of the entire power system. Therefore, how to realize the self-recovery of the power system and quickly restore the normal operation level of the entire power grid is a very important research content. [0003] The black start plan is the most effective strategy to restore the system as soon as possible after a power outage. It can ensure that after a large-scale power outage occurs ...

AI Technical Summary

Problems solved by technology

This method aims at the shortcomings of the traditional black start evaluation method that cannot take into account the subjective and objective aspects. When considering the weight of the evaluation index, the objective data is processed by the entropy weight method and combined with the preference judgment of expert experience, and the fuzziness of each item is within a reasonable range. The evaluation index of the black start scheme, so this method can enhance the objectivity of the evaluation results while taking into account the subjectivity of the project

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