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http://dx.doi.org/10.5370/KIEE.2010.59.11.1949

Transient Analysis and Evaluation of 345kV Combined Transmission Line Connected with GIL  

Jang, Hwa-Youn (원광대 대학원 전기공학과)
Lee, Jong-Beom (원광대 공대 전기정보통신공학부)
Kim, Yong-Kap (원광대 공대 전기정보통신공학부)
Jung, Chae-Kyun (한전 전력연구원)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.59, no.11, 2010 , pp. 1949-1955 More about this Journal
Abstract
This paper describes the characteristic and effectiveness of combined GIL transmission line through lightning surge analysis. In addition the XLPE cable is analyzed in the same condition to compare with GIL. Lighting surge analysis is carried out by EMTP/ATP-Draw to obtain overvoltage of GIL and XLPE cable at service-point and load-out area of underground line. Propagation velocity is calculated in combined transmission lines with GIL and XLPE cable. The overvoltage is also analyzed on GIL and XLPE cable with or without arrester operation. The Analysis results show that overvoltage of GIL is occurred higher than XLPE cable at the same condition. Therefore it is evaluated that the application of GIL at the field should be considered cautiously when more detailed transient analysis, another electrical testes and economic evaluations are implemented.
Keywords
GIL; XLPE cable; Overvoltage; Arrester;
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