A Fast Reliability Calculation Method for Distribution Network System Containing Distributed Power

Abstract

The invention discloses a rapid reliability calculation method of a distributed power supply-containing power distribution system. The rapid reliability calculation method comprises the steps of extracting a basic system from a plurality of power distribution systems, and calculating reliability of a basic system; considering an external parallel component in the power distribution systems, and calculating to obtain external approximate reliability of a remaining system according to the reliability of the basic system; and judging whether an internal parallel component exists or not, and taking the external approximate reliability directly obtained in the step 2 or internal approximate reliability obtained in the step 3 as final reliability. The reliability of the basic power distributionsystem is calculated, a traditional algorithm is improved by time according to the method, and the calculation time is reduced.

Description

technical field [0001] The invention belongs to the reliability comparison of distribution network systems containing distributed power sources, and in particular relates to a fast reliability calculation method for distribution network systems containing distributed power sources. Background technique [0002] Reliability technology was first developed from the aerospace industry and the electronics industry after the Second World War. The task of the power system is to provide users with continuous and qualified electrical energy. Different types of faults will occur in various equipment in the power system, including primary equipment such as distributed power supplies, transformers, transmission lines, circuit breakers, and supporting secondary equipment, which will affect the normal operation of the power system and the normal power supply to users. Power system failures will cause varying degrees of economic losses to power companies, users and certain links in the nat...

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Problems solved by technology

[0005] Disadvantage 1 of the existing technology: the traditional reliability comparison method is mainly concentrated on the side of the power generation system, and rarely concentrated on the side of the distribution network system containing distributed power sources (distributed power sources are distributed power sources that are not directly connected to the centralized power transmission system , and distributed on the user side of the entire power system, so that the power grid can be supplemented at any time

[0006] Disadvantage 2 of the existing technology: the current distribution network reliability calculation method containing distributed power generation rarely considers the common cause failure phenomenon between the original components (the common cause failure phenomenon refers to the simultaneous failure of multiple components due to the same reason , and the common cause failure phenomenon generally occurs between parallel components, generally two components

[0007] Disadvantage 3 of the existing technology: the existing reliability comparison algorithm is mainly based on the traversal method, and the calculation takes a long time

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