지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.7 No.4
- 발행연도
- 2012.7
- 수록면
- 589 - 595 (7page)
이용수
초록· 키워드
오류제보하기
When surges and electromagnetic pulses from lightning or power conversion devices are considered, it is desirable to evaluate grounding system performance as grounding impedance. In the case of large-sized grounding electrodes or long counterpoises, the grounding impedance is increased with increasing the frequency of injected current. The grounding impedance is increased by the inductance of grounding electrodes. This paper presents the measured results of frequency-dependent grounding impedance and impedance phase as a function of the length of counterpoises. In order to analyze the frequency-dependent grounding impedance of the counterpoises, the frequency-dependent current dissipation rates were measured and simulated by the distributed parameter circuit model reflecting the frequency-dependent relative resistivity and permittivity of soil. As a result, the ground current dissipation rate is proportional to the soil resistivity near the counterpoises in a low frequency. On the other hand, the ground current dissipation near the injection point is increased as the frequency of injected current increases. Since the high frequency ground current cannot reach the far end of long counterpoise, the grounding impedance of long counterpoise approaches that of the short one in the high frequency. The results obtained from this work could be applied in design of grounding systems.
목차
Abstract
1. Introduction
2. Methodology
3. Results and Discussion
4. Conclusion
References
참고문헌 (19)
참고문헌 신청
1. [학술지(정기간행물)] - B. Nekhoul / 1996 / Calculating the Impedance of a Grounding System / IEEE Trans. on Magnetics 32 (3) : 1509 ~ 1512
2. [학술지(정기간행물)] - Y. Liu / 2007 / Investigating the validity of existing definitions and empirical equations of effective length/area of grounding wire/grid for transient studies / Journal of Electrostatics 65 : 329 ~ 335
3. [기타자료] - Korea Electric Association / 2009 / Korea Electrotechnical Regulation
4. [기타자료] - British Standards Institution / 1999 / Protection of structures against lightning. BS 6651
5. [학술지(정기간행물)] - M. Heimbach / 1997 / Grounding System Analysis in Transients Programs Applying Electromagnetic Field Approach / IEEE Trans. Power Del 12 (1) : 186 ~ 193
2. [학술지(정기간행물)] - Y. Liu / 2007 / Investigating the validity of existing definitions and empirical equations of effective length/area of grounding wire/grid for transient studies / Journal of Electrostatics 65 : 329 ~ 335
3. [기타자료] - Korea Electric Association / 2009 / Korea Electrotechnical Regulation
4. [기타자료] - British Standards Institution / 1999 / Protection of structures against lightning. BS 6651
5. [학술지(정기간행물)] - M. Heimbach / 1997 / Grounding System Analysis in Transients Programs Applying Electromagnetic Field Approach / IEEE Trans. Power Del 12 (1) : 186 ~ 193
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