High Fault Tolerance Fault Location Method for Distribution Network Fault Interval Based on Slack Optimization

Abstract

The invention provides a relaxation optimization-based high-fault-tolerance fault positioning method for a fault interval of a power distribution network, which is used for solving the problems that alogic method of an existing fault positioning optimization technology is poor in numerical stability and an algebraic method lacks strong multi-fault adaptability. Based on a fault diagnosis minimumset theory and an inequation theorem, and by adopting an algebraic modeling method, a power distribution network fault positioning nonlinear planning model fusing a fault-tolerant factor is provided;a strong identification capability of multiple faults of a feeder line during alarm information distortion is achieved; the solving problem of complementarity constraints does not need to be coped with; and discrete variables can be subjected to optimized decision directly in a continuous domain, so that the complexity of a fault identification process is remarkably reduced. Based on this, a relaxation optimization technology based on a spatial scalability factor is provided for decision solving. The method is strong in fault identification capability, good in robustness, high in numerical stability, high in decision efficiency and wide in application prospect, and solves the positioning problem of the feeder line fault section of the large-scale power distribution network.

Description

technical field [0001] The invention relates to the technical field of distribution network fault location, in particular to a high-fault-tolerant fault location method for distribution network fault intervals based on relaxation optimization. Background technique [0002] Fast and accurate feeder fault section identification technology has become a key technical means to improve the safety and reliability of distribution network. With the improvement of the intelligence level of the distribution network, the intelligent terminal of the feeder can be used to conveniently obtain the operation status information of the feeder, and the fault identification method of the feeder based on it has become the research focus of the academic circle. Among them, the feeder fault section location technology based on fault current information has become a research hotspot in this field because of its straightforward principle and convenient implementation. [0003] Fast and highly fault-...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problems that the logic method of the existing fault location optimization technology has poor numerical stability and the algebraic method lacks strong adaptability to multiple faults, the present invention proposes a highly fault-tolerant fault location method for distribution network fault intervals based on relaxation optimization.

Images