Fault section location of multi-source distribution network based on phasor correction
DOI：10.19783/j.cnki.pspc.220509
Key Words:distribution network section positioning  distributed generation  matrix algorithm  information distortion  FTU
Author NameAffiliation
LIANG Yingda School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China 
TIAN Shu School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China 
LIU Minghang School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China 
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Abstract:To simplify the process of using a distribution network fault location algorithm with distributed generation, and to improve the fault tolerance of the algorithm, an improved section location algorithm is proposed based on a matrix algorithm. First, a structural description matrix to describe the relationship between node and sections is established. To determine whether the overcurrent and its direction are detected, the fault information matrix is established. Then, the fault judgment matrix is obtained by multiplying the structural description matrix and the fault information matrix. The section is divided into different types according to the row elements in the section corresponding matrix, and the fault criterion is established to reflect all the fault conditions in each type of section. Finally, the fault section is determined by comparing the row elements of the fault judgment matrix and the fault criterion. Since FTU upload information is prone to distortion in a distribution network, this paper proposes an information distortion correction method based on phasor correction. The positioning results are corrected by the phase difference between the fault current and the normal operation current, and the influence of fault information distortion on the positioning results is reduced. The switching status of DG and the single and multiple faults of two-phase and three-phase short circuits in a distribution network are simulated. The simulation results verify that the fault location algorithm proposed in this paper is simple in principle, has good accuracy and a certain fault tolerance. This work is supported by the National Natural Science Foundation of China (No. 61403127).
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