A double-ended third harmonic method for vegetation high impedance fault location in overhead distribution systems

架空(工程) 断层(地质) 植被(病理学) 电阻抗 谐波 分布(数学) 环境科学 地质学 工程类 电气工程 声学 地震学 物理 数学 数学分析 医学 病理
作者
Mairon Gallas,Patrick Escalante Farias,Aldair Wontroba,Adriano Peres de Morais,João Paulo Abreu Vieira,Jean Pereira Rossini,Ghendy Cardoso
出处
期刊:Electric Power Systems Research [Elsevier]
卷期号:231: 110257-110257
标识
DOI:10.1016/j.epsr.2024.110257
摘要

Vegetation-related high-impedance faults (VHIFs) on overhead distribution systems can cause damage, maintenance issues, and even wildfires, impacting both utilities and ecosystems. Existing fault location techniques struggle to accurately locate VHIFs. In this paper, we propose a novel double-ended terminal location method based on the third harmonic component of the fault system. The proposed technique determines the distance of the VHIF by approximating the third harmonic voltage at the fault local, utilizing measurements from the remote terminal located at the far-end of the feeder. This method efficiently locates VHIFs with just two measurement terminals, cutting the need and cost of extensive sensor deployment. Moreover, the proposed method overcomes the limitations of traditional fault location techniques by using a third harmonic model of the faulted system, eliminating the need for complex mathematical models to approximate the fault behavior and voltage at the fault local. Simulation tests were conducted to validate the proposed method, demonstrating its effectiveness in accurately locating VHIFs. The technique achieved error rates below 1.6 %, making it a promising solution for real-world applications in power distribution systems. The ability to precisely locate VHIFs meets a proactive protection philosophy and contributes to improved power system protection and ensures uninterrupted power supply.
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