Power distribution network fault positioning method based on hierarchical model and intelligent verification algorithm

Abstract

The invention relates to a power distribution network fault positioning method based on a hierarchical model and an intelligent verification algorithm. The branch circuits of a power distribution network fault positioning model are subjected to two-port equivalent effects, the dimension of the switch function of the positioning model is greatly reduced, and the structure is greatly simplified; thepositioning algorithm is divided into two layers of fault port positioning and fault section positioning, and the operation dimension of the fault positioning algorithm is obviously reduced; the absolute reliability of the fault section positioning is utilized, and the fault port positioning result is fed back and verified, and the defect that the fault identification result of the positioning algorithm is not stable is effectively overcome. The method has good fault tolerance and stability, and meanwhile, the fault identification model is greatly simplified, and the fault positioning efficiency is improved. The method is particularly suitable for fault positioning of a high-permeability and large-scale power distribution network.

Description

technical field [0001] The invention relates to the fields of distribution network fault location, isolation, and power supply recovery, and in particular to a distribution network fault location method based on a layered model and an intelligent verification algorithm. Background technique [0002] With a large number of cleaner and more efficient distributed power (DG) connected to the power grid and rising power loads, the structure and trend of power distribution systems are becoming larger and more complex. The fault location of traditional single-source radial networks method becomes inapplicable. Aiming at the problem of fault location in distribution network with distributed power generation, a direct location algorithm based on matrix theory and an indirect location method using artificial intelligence technology have been formed so far. The block positioning matrix algorithm has the advantages of simple modeling, efficient and accurate positioning, but it has the ...

AI Technical Summary

Problems solved by technology

[0004] To sum up, the artificial intelligence method of indirect modeling of distribution network fault section location has achieved fruitful results in theory, but this type of method still has the following problems: 1) Using logical relationships to describe the matching between fault sections and equipment Correlation characteristics make the construction of the fault location model relatively complicated, especially in high-penetration and large-scale distribution networks, the location modeling is extremely complicated; The calculation dimension is huge and the efficiency is too low; 3) relying solely on intelligent algorithms for fault location has the essential defect of unstable identification results

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