Power distribution network reliability influence analysis method based on improved entropy weight-grey correlation

Abstract

The invention discloses a power distribution network reliability influence analysis method based on the improved entropy weight-grey correlation. The method comprises the steps: firstly introducing animproved entropy weight algorithm into a grey correlation analysis algorithm, so as to overcome a defect that the weights of different influence factors are similar, solving the reasonable weight value of each influence factor, so as to improve the evaluation objectivity, and then employing an improved entropy weight-grey correlation analysis algorithm; solving the correlation degree between thereliability index of the power supply area and each influence factor by using a grey correlation analysis algorithm; finally, for the data of the four power supply areas, obtaining the main factors influencing the power supply reliability of different power supply areas by adopting the method provided by the invention. The result shows that the method can effectively analyze the correlation degreeof each influence factor.

Description

technical field [0001] The invention relates to the technical field, in particular to a distribution network reliability impact analysis method based on improved entropy weight-gray correlation. Background technique [0002] Reliability is one of the distribution network operation performance indicators that power supply enterprises focus on. Reliability requirements at the user level are gradually increasing, and the reliability management and control work of power supply companies is also gradually systematized and refined. Theoretical calculation methods of reliability indexes are mainly analytical method and simulation method. In the analytical method, the network equivalent method or its mixture with other algorithms is generally used. For example, the network equivalent method is used to obtain the reliability index by using the load point of the distribution line. Carry out reliability assessment, or use the forward fault diffusion method to calculate the overall re...

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Problems solved by technology

The Chinese invention patent (CN107133721A) uses gray theory to analyze the correlation factors of bad data in distribution network measurement, but fails to overcome the shortcomings of similar weights of different influencing factors; in order to obtain a reasonable weight value of each influencing factor and improve the objectivity of its evaluation, The invention introduces the improved entropy weight algorithm into the gray relational analysis algorithm, and proposes a distribution network reliability impact analysis method based on the improved entropy weight-gray relational

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