Rapid power distribution network reliability assessment method based on element transfer characteristics

Abstract

The invention discloses a rapid power distribution network reliability assessment method based on element transfer characteristics. The method includes the steps that the power outage influence on upstream loads by a downstream fault is considered in the adverse current transfer process of reliability indexes, and the power outage influence on downstream loads by an upstream fault is considered in the fair current transfer process. In the adverse current transfer process, the reliability indexes of a branch line are transferred to a feeder line and then transferred to a feeder line of the upper grade from the tail end of the feeder line. In the fair current transfer process, the operation time of different protective elements is included in the reliability indexes through step-by-step transfer of the protective elements. The two equivalence processes are combined to obtain the reliability indexes of all points in a system. The unreliable movement rate of the protective elements is considered, and the reliability indexes can be transferred in a whole network. The centralized and classified transfer mode is adopted, the reliability indexes can be transferred in the whole network, and the more and longer the feeder lines are, the more obvious the effect is.

Description

technical field [0001] The invention relates to a distribution network reliability evaluation, in particular to a distribution network reliability rapid evaluation method based on component transfer characteristics. Background technique [0002] Power system reliability is a measure of the power system's ability to supply power and point energy to power users uninterruptedly in accordance with acceptable quality standards and required quantities. After the mid-1960s, reliability technology began to penetrate into the power industry and electrical equipment manufacturing industry, and power system reliability assessment began to enter the practical stage. The distribution network is an important part of the power system. Compared with the transmission grid, it has more kilometers, a wider coverage, and a greater impact on the reliability of electricity consumption. According to literature statistics, about 80% of user power outage accidents are caused by distribution networ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems existing in the prior art, and provide a method for quickly evaluating the reliability of distribution network based on component transfer characteristics, which is used to solve the failure mode effect analysis (failure-mode-effect-analysis, FMEA ) and so on when the system increases rapidly, the calculation redundancy problem

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