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首页> 外文期刊>Electric power systems research >An adaptive three-phase reclosure scheme for shunt reactor-compensated transmission lines based on the change of current spectrum
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An adaptive three-phase reclosure scheme for shunt reactor-compensated transmission lines based on the change of current spectrum

机译：基于电流谱变化的并联电抗器传输线自适应三相重合方案

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In this paper, a new three-phase adaptive reclosing scheme for transmission lines with shunt reactors is proposed to identify fault nature and determine the arc extinction time under the single and double phase-to-ground faults. According to the fact that the faulted phase currents of shunt reactors contain only one oscillating frequency before the fault extinction and contain other two different oscillating frequencies when the fault is extinguished, this change of current frequency can be used to distinguish transient faults. When sampling rate is an integral multiple of the faulted phase current frequency of shunt reactors under permanent faults, an abrupt increase of currents even harmonics which is caused by spectral leakage of the INT algorithm under non-synchronous sampling can lead to identify transient faults and three-phase reclosing. Electromagnetic Transient Program simulation results verify the correctness of the frequency spectrum characteristic analysis of the faulted currents of shunt reactor. The feasibility of the proposed scheme is also tested under different fault condition. (C) 2018 Elsevier B.V. All rights reserved.
机译：本文提出了一种新的带有并联电抗器的输电线路三相自适应重合闸方案，以识别故障性质并确定单相和双相接地故障下的灭弧时间。根据并联电抗器的故障相电流在故障消除之前仅包含一个振荡频率，而在故障消除时包含另外两个不同的振荡频率的事实，这种电流频率的变化可用于区分瞬态故障。当采样率是永久性故障下并联电抗器故障相电流频率的整数倍时，由于非同步采样下INT算法的频谱泄漏而导致的电流甚至谐波的突然增加，可以识别瞬态故障，而三个相重合闸。电磁暂态程序仿真结果验证了并联电抗器故障电流频谱特性分析的正确性。在不同的故障条件下，还对所提方案的可行性进行了测试。 （C）2018 Elsevier B.V.保留所有权利。

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