A Method for Evaluating Power Supply Reliability of Important Power Users Based on Analytic Hierarchy Process

Abstract

The present invention provides a method for evaluating the reliability of power supply of important power users based on AHP. The method includes: establishing an evaluation structure for evaluating the reliability of power supply of important power users by using AHP according to evaluation indicators; determining candidate power supply modes; calculating The evaluation indicators of the evaluation criteria in the index layer and perform index scoring on the evaluation indicators; carry out weight distribution on the evaluation indicators under the evaluation criteria and the evaluation criteria of the criterion layer; score the evaluation criteria to determine the classification of the power supply mode value. This method is suitable for analyzing the reliability evaluation of power supply mode of important power users in power distribution system and the reliability evaluation of power distribution system including important users.

Description

technical field [0001] The invention relates to a method in the field of power distribution system reliability evaluation, in particular to a method for evaluating power supply reliability of important power users based on analytic hierarchy process. Background technique [0002] Power system reliability assessment began in the late 1960s. Initially, it mainly focused on the power generation and transmission system, because the configuration of power generation and transmission equipment is relatively concentrated, the one-time investment is large, and the construction period is long. Equipment failure or outage will bring serious and extensive negative effects to society and the environment. However, in fact, the power distribution system, which is the terminal link of the power system to the user, has the greatest impact on the user's power supply performance, because related surveys show that about 80% of the user's power outages are caused by the failure of the power dis...

AI Technical Summary

Problems solved by technology

FMEA is exhaustive and can reliably solve reliability criteria (including load point, feeder and system reliability criteria). However, when the system structure is complex, on the one hand, due to the large number of components to be analyzed, the method will become very complicated. On the one hand, the load level of important power users is high, and the boundary conditions and factors that need to be considered when selecting a power supply mode are complex. The direct application of the distribution network power supply mode selection theory cannot reflect the characteristics of important users themselves, such as the single power outage time of important users The allocation ratio of emergency power supply and emergency power supply is very important for the evaluation of the reliability of important users, but the reliability criterion of distribution network is relatively simple, which cannot effectively reflect it.

[0005] In the existing technology, the indicators are limited to one or two of reliability and economy, which cannot fully reflect the comparison of the advantages and disadvantages of important user power supply modes, thus limiting the integrity and correctness of the evaluation system

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