High impedance fault detection and location in distribution networks using smart meters

Francinei L. Vieira, J. Filho, P. M. Silveira, C. A. Guerrero, M. P. Leite
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引用次数: 14

Abstract

High impedance faults (HIFs) present great difficulty of identification and location in distribution networks (DN) due to their characteristics of low current magnitude. Advances in smart grids and distribution automation allow the detection of disturbances that were previously unnoticeable in DN. This work aims to present a new method for detection and location of HIFs from smart meters placed at strategic points in the feeder, using a voltage unbalance based approach. The methodology was evaluated through simulations in MATLAB / Simulink, focusing on the detection of high impedance series faults. The results showed that the algorithm effectively identifies broken conductors, with or without ground faults, located either at the load or source side. Once technical and economic feasibility is proven, these methods can assist energy distribution utilities in restoring the normal operating conditions of the distribution network.
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智能电表在配电网中的高阻抗故障检测与定位
在配电网中,高阻抗故障由于其电流大小较小的特点,给识别和定位带来了很大的困难。智能电网和配电自动化的进步允许检测以前在DN中无法察觉的干扰。这项工作的目的是提出一种新的方法来检测和定位hfs从智能电表放置在馈线的战略点,使用基于电压不平衡的方法。通过MATLAB / Simulink仿真对该方法进行了验证,重点研究了高阻抗串联故障的检测。结果表明,该算法能有效地识别出负载侧或源侧有或无接地故障的断线。一旦技术和经济上的可行性得到证实,这些方法可以帮助配电公司恢复配电网的正常运行状态。
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