Power distribution network reliability quadratic optimization assessment method facing power distribution reliability

Abstract

The invention discloses a power distribution network reliability quadratic optimization assessment method facing power distribution reliability. According to the method, a power distribution network reliability quadratic optimization assessment model facing the power distribution reliability is utilized, a weak link of the system reliability can be identified by upwards inferring the system model from a system layer, and then power distribution network reliability quadratic optimization assessment is carried out. According to the assessment method, the degree of influence on the system reliability from an element or an element assembly is represented through posteriori off-stream probability index and off-stream frequency influence degree index quantification. The method comprises the steps that firstly, a power distribution network is divided into a plurality of standard submodules, and then modeling and integration are carried out on the submodules; secondly, primary assessment on the index of the system reliability is carried out based on the model, and loading points and the index of the system reliability are obtained. The power distribution network reliability quadratic optimization assessment method facing the power distribution reliability aims to indentify the weak link of the power distribution network reliability and seek for an approach to improve the level of the system reliability.

Description

technical field [0001] The invention relates to an evaluation model of distribution network power supply reliability, in particular to a power supply reliability-oriented distribution network reliability secondary optimization evaluation method. Background technique [0002] The power distribution system is an important link between the power supply and the user, and its power supply reliability has a direct relationship with the user. With the improvement of users' requirements for power supply quality, people pay more and more attention to the reliability of power distribution system. The power distribution system has the characteristics of many components and complex structures. How to quickly and accurately evaluate the reliability and determine the weak links of the network has become a very important issue. [0003] At present, the reliability planning modeling and analysis methods of distribution network mainly include sensitivity analysis method, minimum path algori...

AI Technical Summary

Problems solved by technology

The sensitivity method can only analyze the change of reliability index caused by the change of local parameters in each calculation, and does not reveal the influence degree of components on the overall reliability of the system, and a large number of repeated calculations are required to analyze the changes of different parameters

The minimum path algorithm and the minimum cut set algorithm analyze the influence of components on the reliability of the load point by recording the contribution of each component to the reliability index of the load point during the calculation process, but the minimum path algorithm or the minimum cut set algorithm and the disjoint The processing requires a large amount of calculation and node storage overhead, and these models are also difficult to express the conditional dependencies among various uncertain factors, and cannot flexibly carry out information dissemination and various hypothetical analysis

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