A distribution network reliability assessment method and its expansion for distribution network reliability assessment methods of different scales

Abstract

The invention relates to a reliability evaluation method for a power distribution network and expanded reliability evaluation method for different scales of power distribution networks. An equipment reliability evaluation model based on internal and external influential factor analysis is mainly used in the method; the internal factors of equipment comprise all factors which influence normal operation of the equipment and comprise work life, overload degree and activation frequency; and the external factors of the equipment are factors which cause interruption of power supply actively and naturally and comprise lightning stroke, falling off of trees and electric poles, severe weathers and operation by people except maintenance staff. The relative frequency of each fault needs to be calculated before that the reliability influenced by individual external factor is calculated; the total times of the fault in certain month is compared with the total times of the fault in the whole year; and the complete reliability level of the equipment C is defined as the square root of the reliability level of the internal factors and the reliability level of the external factors.

Description

technical field [0001] The invention relates to a distribution network reliability evaluation method and a distribution network reliability evaluation method extended to different scales, and belongs to the technical field of distribution network reliability evaluation. Background technique [0002] The scale and complexity of the distribution network continue to increase, and customers have higher and higher requirements for power supply reliability. However, the current distribution network is affected by various factors such as equipment defects and operation and maintenance failures, and its reliability is still at a low level. It should be combined with environmental conditions, technical levels and customer needs to increase distribution network investment to improve its reliability. [0003] At present, the main distribution network reliability assessment methods mainly include analytical method, simulation method and probability analysis method. Among them, the simu...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the existing technology, and provide a method to solve the problem of different reliability evaluation methods and different logics between different ranges of the existing distribution network by starting from the internal and external factors that affect the safe and stable operation of the equipment. Difficult to expand and popularize and other issues, can be applied to different scenarios and different ranges of scalable distribution network reliability evaluation methods and extended to different scale distribution network reliability evaluation methods

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