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A Study on the Measurement of Footing Resistance of Transmission Towers with Overhead Grounding wires

가공지선이 연결된 송전철탑의 탑각저항 측정에 관한 연구

  • 이원교 (한국전력공사 전력연구원) ;
  • 최종기 (한국전력공사 전력연구원) ;
  • 이영우 (한국전력공사 전력연구원) ;
  • 최인혁 (한국전력공사 전력연구원) ;
  • 김경철 (홍익대학교 산업기술연구소)
  • Published : 2010.01.01

Abstract

Footing Resistance of a 154 kV transmission towers in korea is commonly required to be less than 15 ohm to avoid lightning back-flashover accident. The periodic measurement of Footing Resistance is important to verify that the grounding performance of the towers has been maintained good. Towers are electrically connected in parallel with overhead grounding wire, therefore footing resistance of each tower will be measured after disconnecting the overhead ground wires from the towers. however, In this paper, three direct measurement methods of footing resistance are presented. There are very useful methods without disconnecting overhead ground wires from the tower under measurement. They are compared in KEPCO 154 kV transmission towers. The experimental results describe performances of them.

References

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