A Comprehensive Evaluation for the Power Supply Reliability in Distribution Network based on Improved Entropy Method

Abstract

Considering power quality, a user-oriented and extended index system of power supply reliability has been built, and a comprehensive evaluation of power supply reliability based on improved entropy method in distribution network has been designed in this paper. Firstly, the paper has built an extended power supply reliability index system from 3 following aspects: the supply side, user side as well as the contrast, therefore, 7 new user-side indexes can reflect the real level of the power supply reliability by its continuity and availability, and 2 contrast indexes can reflect power supply reliability of the line among users in low and medium voltage; Secondly, considering its requirements and index characteristics, a comprehensive evaluation based on improved entropy method has been established. An initial index weights can be attained by this method, then, the weight matrix can be determined by a principle called ‘overflowing-value punishment’. What’s more the comprehensive values can also be attained after weighting and summation. Finally, its effectiveness can be verified by the result of case.

Highway Microgrid Project Evaluation under Energy Transportation Integration

“…The results express that the improved principal component analysis method can keep more of the original data's scattered information. Zeng et al [19] built a multi-stage evaluation index system and proposed an evaluation model combining equilibrium analysis and principal component analysis to achieve the objective evaluation of correlation index information. Based on the fuzzy membership degree hypothesis, He et al [20] quantifies the risk situation of each stage in the life cycle of the urban power grid, and gives the comprehensive quantitative scores of various risks.…”