engleski

Application of Line Surge Arresters for Voltage Uprating and Compacting of Overhead Transmission Lines

This paper discusses the possibility of using line surge arresters (LSAs) for the reduction of switching overvoltages (SOVs) on voltage uprated transmission lines. The method for the selection of LSA energy class and determination of optimum installation locations was proposed. The method was applied in case of improving the overvoltage protection of the transmission line uprated from 220 kV to 400 kV. The possibility of compacting a 400 kV transmission line by installing LSAs was considered. Since a risk of flashover increases due to the reduction of insulation clearances, an algorithm that estimates the risk of flashover was developed and applied in case of compacting a 400 kV transmission line.

switching overvoltages ; uprated transmission line ; line surge arrester ; EMTP-RV ; risk of flashover ; compacting transmission lines

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