Identification of Lightning Stroke and Fault in the Travelling Wave Protection
Identification of Lightning Stroke and Fault in the Travelling Wave Protection作者机构：EPRI Shandong Electric Power Corporation China School of Electrical Engineering Shandong University
出 版 物：《Journal of Electromagnetic Analysis and Applications》 (电磁分析与应用期刊（英文）)
年 卷 期：2009年第1卷第1期
页 面：31-35页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Transmission Line Travelling Wave Based Protection Lightning Stroke Characteristic of Waveform Cri-terion
摘 要：To resolve the impact of transient high frequency signals induced by lightning stroke on the travelling wave protection of transmission line, a novel identification algorithm is proposed. Using the characteristics of symmetric current wave-form induced by lightning stroke without causing fault and that of asymmetric current waveform generated by fault within a very short time interval, the waveform of transient current above and below time-axes are integrated respec-tively. First, through comparing the relative ratio of them with threshold value, the primary criterion identifying fault and lightning stroke is constructed;Secondly, to improve the reliability of discrimination between lightning stroke with and without causing fault, according to the difference of them, the secondary criterion is also defined. The simulation results and analysis demonstrate that the proposed integral criterions are valid and correct.
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