대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2009년도 제40회 하계학술대회
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- Pages.1489_1490
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- 2009
매설지선 접지임피던스의 주파수 의존성
Frequency Dependance of Ground Impedances of the Counterpoises
- 최영철 (인하대학교 IT공대 전기공학부) ;
- 최종혁 (인하대학교 IT공대 전기공학부) ;
- 김동규 (인하대학교 IT공대 전기공학부) ;
- 이규선 (인하대학교 IT공대 전기공학부) ;
- 양순만 (인하대학교 IT공대 전기공학부) ;
- 이수봉 (인하대학교 IT공대 전기공학부) ;
- 이복희 (인하대학교 IT공대 전기공학부) ;
- 안창환 (인하공업전문대학)
- Choi, Young-Chul (Inha university) ;
- Choi, Jong-Hyuk (Inha university) ;
- Kim, Dong-Kyu (Inha university) ;
- Lee, Gyu-Sun (Inha university) ;
- Yang, Soon-Man (Inha university) ;
- Lee, Su-Bong (Inha university) ;
- Lee, Bok-Hee (Inha university) ;
- Ahn, Chang-Hwan (Inha technical college)
- 발행 : 2009.07.14
초록
Ground impedance is changed according to frequency of the current injected into the grounding system. Because the lightning surge gives a broad frequency spectrum from some ten Hz to a few MHz, frequency dependance of ground impedance must be evaluated. In this paper, we have constructed 10m, 30m, 50m counterpoise and evaluated frequency dependance of ground impedance. Also we have evaluated frequency dependance of ground impedance according to current injection point. As a result, long counterpoises have low ground resistance, but ground impedances of those are significantly increased in the range of high frequency. In the case that currents are injected into the center of counterpoise, the ground impedance is most lower than any other injection point. Also, additory ground rod of 1.8m long affect ground impedance decrease.
키워드