نوع مقاله : مقاله پژوهشی
نویسندگان
1 'گروه برق- دانشگده مهندسی برق و کامپیوتر-دانشگاه علم و فناوری مازندران
2 گروه برق-دانشکده مهندسی برق و کامپیوتر-دانشگاه علم و فناوری مازندران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
When lightning strikes the guard wires or the top of a transmission tower, the lightning current is discharged into the ground through the tower structure. This causes an increase in the tower's potential, resulting in an overvoltage across the insulator string. If the voltage across the insulator exceeds its dielectric withstand level, a back-flashover (BFO) may occur. Overhead transmission lines (OHLs) passing through rocky mountainous regions are particularly vulnerable to lightning, due to shorter striking distances and high soil resistivity. Therefore, accurately estimating the maximum overvoltage caused by lightning in mountainous regions is an important issue. This paper presents an analysis of BFO patterns to investigate the impact of various OHL design parameters in rocky mountainous areas particularly the design of an effective tower footing grounding system, with the aim of improving lightning performance. The simulation was conducted on a 132 kV double-circuit OHL using EMTP-RV software. The obtained results were validated with the presented results in reference and demonstrated good agreement.
کلیدواژهها [English]
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