Abstract In this paper, a novel integrated approach of protective relaying methodology has been adopted for detecting faults and its location estimation in long transmission line. First, the detection algorithm has been formulated using positive sequence admittance. Subsequently, fault location algorithm has been developed using positive sequence voltage and current phasors. The proposed algorithms have been implemented on a 50 Hz, 400 kV single-circuit transmission line in MATLAB environment. A wide range of diversified and challenging cases have been simulated to test the reliability of this scheme. The results confirm the preciseness of the algorithm, as it can produce accurate results under stressed conditions, viz. high impedance fault (HIF), current transformer (CT) saturation/ capacitive voltage transformer (CVT) transient, close-in faults, swing condition, source strength variation, etc. Moreover, this scheme has also been successfully tested in series-compensated and double-circuit transmission line, which brings out the superiority of this scheme. The comparative analysis with recent protective relaying techniques institutes the potentiality and robustness of the scheme.

中文翻译：

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一种利用正序故障分量的输电线路保护新方案

摘要 在本文中，一种新的继电保护方法集成方法被用于长输电线路中的故障检测和位置估计。首先，使用正序导纳制定了检测算法。随后，使用正序电压和电流相量开发了故障定位算法。所提出的算法已在 MATLAB 环境中的 50 Hz、400 kV 单回路传输线上实现。已经模拟了广泛的多样化和具有挑战性的案例来测试该方案的可靠性。结果证实了算法的精确性，因为它可以在压力条件下产生准确的结果，即。高阻抗故障 (HIF)、电流互感器 (CT) 饱和/电容式电压互感器 (CVT) 瞬态、近距离故障，摆幅、源强变化等。此外，该方案在串补双回输电线路中也得到了成功的测试，充分体现了该方案的优越性。与最近的继电保护技术的比较分析确定了该方案的潜力和稳健性。