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首页> 外文期刊>Electric power systems research >A new impedance-based fault location scheme for overhead unbalanced radial distribution networks
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A new impedance-based fault location scheme for overhead unbalanced radial distribution networks

机译：架空不平衡径向配电网基于阻抗的故障定位新方案

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摘要

This paper proposes an analytical impedance-based fault location scheme for distribution systems. The approach is based on voltage and current measurements extracted at only one-end feeding substation. Modal transformation is implemented to decompose the coupled three phase equations due to mutual effects into decoupled ones, and hence directly calculating fault distance in each section without iterative processes. The proposed approach considers various aspects of distribution systems: intermediate loads along the feeder, tapped laterals and sub-laterals at various nodes, time varying loads, and unbalanced operations. The proposed algorithm is extensively investigated on a typical real 11 kV distribution system, South Delta electricity sector, Egypt using MATLAB environment. Different cases are studied considering various loading conditions, varied fault resistance values and different fault types. The achieved results ensure the effectiveness of the proposed fault locator irrespective to fault conditions. Besides, the robustness of the proposed scheme against unbalanced loading, network topology change and non-homogenous network sections is also confirmed. (C) 2016 Elsevier B.V. All rights reserved.
机译：本文提出了一种基于阻抗分析的配电系统故障定位方案。该方法基于仅在单端馈电变电站提取的电压和电流测量值。进行模态变换以将由于互作用而产生的耦合的三相方程分解为解耦的方程，从而无需迭代过程即可直接计算每个部分的故障距离。所提出的方法考虑了配电系统的各个方面：沿馈线的中间负载，在各个节点处分接的侧向和次侧向负载，随时间变化的负载以及不平衡的运行。拟议的算法在典型的实际11 kV配电系统埃及南部三角洲电力部门使用MATLAB环境中进行了广泛研究。考虑各种负载条件，不同的故障电阻值和不同的故障类型，研究了不同的情况。所获得的结果确保了所提出的故障定位器的有效性，而与故障条件无关。此外，还证实了所提出的方案针对不平衡负载，网络拓扑变化和非均匀网络部分的鲁棒性。 （C）2016 Elsevier B.V.保留所有权利。

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