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| Identification of Back Striking and Shielding Failure on Transmission Line Based on Time Domain Characteristics of Traveling Wave |
| Dai Jiejie1, Liu Yadong1, Jiang Wenjuan2, Liu Zongjie3, Sheng Gehao1, Yan Yingjie1, Jiang Xiuchen1 |
1. College of Electrinic Informnation and Electrical Engineering Shanghai Jiaotong University Shanghai 200240 China;
2. State Grid of China Technology College Jinan 250002 China;
3. Jining Power Supply Company State Grid Shandong Electric Power Company Jining 272000 China |
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Abstract Identification of lightning type can provide directive guidance for the operation and maintenance of transmission lines. In this study, the correspondence is constructed satisfied by the three-phase polarities of fault traveling wave currents when a fault of transmission line is caused by lightning. On the basis of the lightning overvoltage theory and the boundary conditions of transmission line, the back striking is identified according to the differences and similarities in three-phase polarities of current traveling waves. A judgment method is proposed for the transmission line fault caused by lightning and shielding failure based on modified energy ratio, considering the energy variation features of transient traveling wave. Finally, the identification on lightning types of the transmission line is achieved. Simulation and field experiment verify the proposed method.
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Received: 28 February 2014
Published: 01 April 2016
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2016, Vol. 31 
