KIEE International Transactions on Power Engineering

The Korean Institute of Electrical Engineers (대한전기학회)
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Impedance Calculation of an Underground Transmission Cable System Installed with a Sheath Current Reduction Device

  • Jung, Chae-Kyun (Dept. of Electrical Engineering, Wonkwang University) ;
  • Lee, Jong-Beom (Dept. of Electrical Electronic and Information Engineering, Wonkwang University) ;
  • Kang, Ji-Won (Power System Lab., Korea Electric Power Research Institute) ;
  • Wang, Xin Heng (School of Computer and Information System, Kingston University) ;
  • Song, Yong Hua (Dept. of Electrical Electronic and Information Engineering, Brunel University)
  • Published : 2004.12.01
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Abstract

Previous research results indicated that the designed current reduction device could effectively reduce the sheath circulating current and that its RDP protection device could shield it against both fault and lightning strokes. In this paper, cable impedance is analyzed using wavelet analysis and distance relay algorithm following the installation of these devices so that the operation of distance relay can be estimated. The test results confirm that in these devices, the fault inception angle and SVL bonding types have no impact on the change of cable impedance. In other words, the conventional distance relay can be used without a new relay setting. Thus we can finally assert that the designed current reduction device and its protection device are effective and can be safely installed on the cable transmission system without disturbance.

Keywords

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