Relative influence analysis model applied to evaluation of distribution network construction and renovation schemes and power supply quality indexes

Abstract

The invention discloses a relative influence analysis model applied to evaluation of distribution network construction and renovation schemes and power supply quality indexes, and the model is used for carrying out comprehensive quantitative evaluation on the distribution network construction and renovation schemes from the perspective of power supply quality so as to fill the gap of the researches of relative fields at the present stage. The method comprises the following steps: determining a subjective weight by utilizing an AHP method; determining an objective weight by utilizing an entropy evaluation method; determining a comprehensive weight of the power supply quality indexes by utilizing a multiplicative combination method; and calculating the power supply quality comprehensive indexes of the distribution networks corresponding to the construction and renovation schemes by utilizing a multilevel gray relative analysis method. According to the relative influence analysis model, comprehensive quantitative evaluation can be carried out on the distribution network construction and renovation schemes from the aspects of power supply reliability and electric power quality, the subjective determination and objective determination of the weights are combined, and the relevancy is calculated level by level by utilizing the multilevel gray relative analysis method, so that the evaluation process is scientific and reasonable and has favorable universality, and reference and basis are provided for the making of the distribution network construction and renovation schemes.

Description

technical field [0001] The invention relates to the field of power supply quality evaluation of a distribution network, in particular to the determination of the weight of a power supply quality evaluation index of a distribution network and the establishment of an analysis model of the correlation between a distribution network construction reconstruction plan and a power supply quality evaluation index. Background technique [0002] The distribution network is usually composed of distribution substations, feeder lines, distribution transformers and other equipment. It connects the power generation and transmission systems and users, and directly supplies power to the society and power end users. It is the terminal link of the power grid supply chain. With the rapid development of the national economy and the adjustment of the energy structure, the power consumption of industry and urban residents continues to grow rapidly, and users have put forward higher requirements for ...

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Problems solved by technology

However, at present, there is still a certain gap between the overall construction level of my country's distribution network and developed countries, and the quality of power supply cannot fully meet the needs of users. In the actual operation process, the following common problems will appear: (1) power distribution The network load is growing rapidly and failures occur frequently; (2) The distribution network equipment is outdated and overloaded; (3) The distribution network construction is seriously behind the overall level of power system construction

The disadvantage of the entropy weight method is that it does not consider the actual meaning of the data itself, and sometimes there will be unrealistic situations

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