Linear integer planning method of power distribution network online breakdown fault-tolerant location

Abstract

The invention discloses a linear integer planning method of power distribution network on-line breakdown fault-tolerant location. The method includes the following steps that: an independent power distribution region and a related equipment set of the independent power distribution region are established; layered decoupling numbering is performed on the independent power distribution region, and a cause and effect equipment set is established; current alarm information is collected, a switching function set is established; an absolute value model of power distribution network breakdown location is established, and an equivalent linear integer planning breakdown location model can be established, and a feeder breakdown section is located through 0-1 linear integer planning; and the isolation of the feeder breakdown section is realized through the location result of the feeder breakdown section. According to the method of the invention, the dependence of a logic relationship modeling-based optimized fault location method on a swarm intelligence algorithm can be gotten rid of; and the conventional 0-1 linear integer planning is adopted to realize the location of the feeder breakdown section. The method is suitable for closed-loop open-loop-operation large-scale power distribution network online breakdown location. The method of the invention has the advantages of convenience, high reliability, high fault tolerance capability, high breakdown location efficiency, high adaptability for multiple breakdowns and the like.

Description

technical field [0001] The invention relates to the technical field of intelligent distribution network, and more specifically, relates to a linear integer programming method for fault-tolerant on-line fault location of distribution network, which realizes single or multiple fault location for distribution network feeder fault section. Background technique [0002] Distribution network fault location, as a prerequisite for accurate identification of feeder fault areas and restoration of user power supply, is an important part of smart distribution network construction and plays an important role in improving distribution system self-healing and power supply reliability. [0003] For a long time, when a fault occurs in the distribution network, manual line inspection is generally used to find the fault point, which is not only time-consuming and laborious, but also leads to a long power outage. Although the application of the geographic information system of the distribution n...

AI Technical Summary

Problems solved by technology

However, due to the use of logical relationship modeling, it is inevitable to face the following two problems: (1) Because the model needs to use logical relationship modeling, the model construction is relatively complicated, and if it is applied to large-scale distribution networks, it will further increase the modeling (2) Because the fault location model contains logical relational operations, the conventional optimization algorithm with good numerical stability cannot be applied, so it can only be solved by the swarm intelligence algorithm with random search characteristics. When the distribution network scale is large There will be time-consuming calculations, unstable fault location results, etc.

[0008] From the above discussion, it can be seen that the existing distribution network fault location methods based on information collected by automated terminals such as FTU: distribution network graph theory identification methods lack strong adaptability to information distortion or loss; distribution network based on artificial neural networks Network fault location methods are difficult to meet the location requirements of distribution network topology changes and multiple faults; distribution network fault location methods based on swarm intelligence algorithms have inherent defects such as low location efficiency and poor numerical stability.

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