Minimum Transverse Distance Determination Between EGLA and Insulator in Presence Lower Shield Wire in Double-Circuit 400kV Transmission Line
Publish place: Conference on the Development of Advanced Research in Electrical and Computer Engineering
Publish Year: 1395
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ECCIRD01_035
تاریخ نمایه سازی: 6 اردیبهشت 1396
Abstract:
Lightning is the main cause of low reliability in overhead transmission lines. Studies show that the most power transmission line outages caused by lightning. Often exposure of shield wire, reducing tower footing resistance, and line arrester is used for improving the performance of transmission lines against lightning strike. Upper shield wire in presence lower shield wire has been considered for lightning protection. EGLA and insulators distance dependent on the number of EGLA in the tower. Hence, EGLA with external fixed gap due to the rings at it’s gap terminals is located in different phases of the tower in parallel with the insulators that has been struck by lightning. This minimum transverse distance simulated with EMTP-RV software and determined using disruptive discharge voltage equation in the IEC 60060-1 standard. Eventually, after downstream shield wire evaluation, the minimum distance between this two transmission line equipment is determined by try and error for preventing transverse discharge phenomenon is caused by the proximity effect of the discharging ring of the line arrester.
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Authors
Mahmoud Eshagh Ahmadi
Vahdat Institute of Higher Education, Torbat-e Jam, Iran
Mohsen Niasati
Department of Electrical and Computer Engineering, Semnan university, Semnan,Iran
Mahmoud Bargharar-Roudi
Vahdat Institute of Higher Education, Torbat-e Jam, Iran
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