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A directional protection scheme during single pole tripping

机译：单极跳闸时的方向保护方案

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This paper proposes a positive sequence superimposed current based procedure for the identification of fault directionality accomplished with single pole tripping (SPT) schemes. The proposed procedure decides the fault direction by the angle deviation between pre-fault and faulty positive sequence current components. To realize the ability of the proposed scheme under single pole tripping, several critical cases are addressed such as high fault resistance (HFR), different fault locations, different fault types, change in power flow direction, variation in source capacity and other critical system situations are addressed to prove the correct behavior of the proposed procedure. Numerous fault scenarios have been emulated for variant system configurations (single and double circuit lines) using ATP/EMTP simulation package. The current components are determined using the discrete Fourier transform (DFT). It is proved using extensive simulations tests that the proposed method is accurate and can be used for refurbishing of the conventional directional relays. (C) 2016 Elsevier B.V. All rights reserved.
机译：本文提出了一种基于正序叠加电流的程序，用于通过单极跳闸（SPT）方案完成故障方向性的识别。所提出的程序通过故障前和故障正序电流分量之间的角度偏差来确定故障方向。为了实现所提出方案在单极跳闸下的能力，解决了几种关键情况，例如高故障电阻（HFR），不同故障位置，不同故障类型，潮流方向变化，电源容量变化和其他关键系统情况旨在证明所建议程序的正确行为。使用ATP / EMTP仿真程序包已针对多种系统配置（单回路和双回路线路）模拟了许多故障情况。使用离散傅里叶变换（DFT）确定当前分量。通过广泛的仿真测试证明，该方法是准确的，可用于常规定向继电器的翻新。 （C）2016 Elsevier B.V.保留所有权利。

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