Research on the Positioning Method of Single-Phase to Earth Fault in Distributed Distribution Network

Abstract:

The existing high-density distributed distribution network single-phase earth fault interval location method has the disadvantage of long positioning time. Hence, a single-phase earth fault interval positioning method for high-density distributed distribution network is proposed to solve this problem. In order to accurately locate the single-phase earth fault interval of distribution network, zero-order equivalent model of distribution network is built at first. Next the clustering algorithm is used to extract the single-phase earth fault characteristics, while the single-phase earth fault phase current increment is calculated by using the analysis method to obtain the single-phase earth fault phase current increment law. Then a fault-maximum interval T-shaped structure is built to divide the potential fault interval. Finally, the S-transformation is applied to accurately locate the single-phase earth fault interval, and the localization of the single-phase earth fault interval of the high-density distributed distribution network is achieved. The experimental results show that comparing with the existing high-density distributed distribution network single-phase earth fault interval positioning method, the proposed high-density distributed distribution network single-phase earth fault interval positioning method dramatically reduces the positioning time. It is fully explained that the proposed method in this article has a better positioning effect.

• Periodical: Advances in Science and Technology (Volume 105)
• Pages: 151-158
• DOI: https://doi.org/10.4028/www.scientific.net/AST.105.151
• Online since: April 2021
• Authors: Shi Qin Zhao*, Rong Jia Cen, Chun Qing Shi
• Keywords: High Density Distributed Distribution Network, Interval, Location, Single Phase to Ground Fault

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DOI: 10.1109/iccnea57056.2022.00069

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