Browse > Article
http://dx.doi.org/10.5370/KIEE.2011.60.8.1560

Analysis on the Dielectric Characteristics of Dry Air According to Pressures for Developing an Eco-friendly High Voltage Switchgear  

Nam, Seok-Ho (충주대 첨단과학기술대 전기공학과)
Kang, Hyoung-Ku (충주대 첨단과학기술대 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.60, no.8, 2011 , pp. 1560-1565 More about this Journal
Abstract
The environmental pollution caused by green-house gases such as $CO_2$ and $SF_6$ has been becoming the main issue of industrial society. Many developed countries are making efforts to minimize the amount of $CO_2$ emission come from the operation of high voltage electrical apparatuses. As a part of these efforts, 180 countries signed the Kyoto Protocol in 1997 to cut back on their green-house gas emissions. Nowadays, the study on the development of dry air insulated switchgear (DAIS) which is known as an eco-friendly electrical apparatus is in progress. A DAIS is advantageous for minimizing the effect of impurities and enhancing the dielectric characteristics over an air insulated switchgear (AIS) by applying constant pressure to an enclosed cubicle. Therefore, a study on the electrical insulation performance of dry air as a gaseous insulation medium is conducted in this paper to substitute a gas insulated switchgear (GIS) for DAIS. As results, it is verified that the AC dielectric characteristics of dry air are similar to those of air and the lightning impulse dielectric characteristics of dry air are superior to those of air at 1bar pressure condition. However, dry air is of inferior dielectric characteristics to $SF_6$ at 4bar pressure condition. Finally, it is suggested that the internal pressure of DAIS should be over 4bar pressure to develop a high voltage switchgear which has similar electrical performance to a conventional GIS. Also, the empirical formulae on calculating the maximum electric field intensity at sparkover of dry air are deduced by experiments according to pressures. It is expected that these results are helpful to design and develop a high voltage electrical apparatus.
Keywords
Eco-friendly electrical machine; Electrical breakdown; High voltage switchgear; Insulation design; Utilization factor;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By SCOPUS : 0
연도 인용수 순위
1 남석호, 강형구, "고전압 전력기기 개발을 위한 기중 절연파괴특성 분석에 관한 연구", 대한전기학회논문지. Vol. 60, No. 5, May, pp. 1005-1010, 2011.
2 Yasuo Nishikori, Soji Kojima, and Teruya Kouno, "A Study of the Field Utilization Factor and the Maximum Electric Field at Sparkover of the standard Sphere Gaps", Electrical Engineering in Japan, vol. 139, no. 4, pp. 399-404, 2002.
3 강형구, 고태국, "이용률을 이용한 과냉질소 냉각시스템용 절연가스의 절연특성에 관한 연구", 한국초전도 저온공학회논문지. Vol. 12, No. 1, Mar, pp. 52-55, 2010.
4 Hyoungku Kang and Tae Kuk Ko, "Analysis on the Dielectric Characteristics of Insulation Gases for Developing a High Voltage Superconducting Fault Current Limiter," IEEE Trans. on Applied Superconductivity, vol. 21, no. 3, pp. 1332-1335, 2011.   DOI   ScienceOn
5 Hyoungku Kang, Jin Bae Na, Yoon Do Chung, Min Cheol Ahn, Duck Kweon Bae, and Tae Kuk Ko, "Study on the Breakdown Voltage Characterization of Insulation Gases for Developing a High Voltage Superconducting Apparatus", IEEE Trans. on Applied Superconductivity, vol. 20, no. 3, pp. 1646-1649, 2010.   DOI   ScienceOn
6 박선희, "유럽연합과 교토의정서", 한국프랑스학회, 2008년 추계학술발표회, pp. 125-144, 2008.
7 김준연, 김용한, 석복렬, "친환경 전력기기 개발을 위한 dry air 절연파괴특성 연구", 대한전기학회 제 41회 하계학술대회 논문집, pp. 1124-1125, 2010.
8 최재형, 최진욱, 이해근, 송정빈, 김해종, 성기철, 김상현, "고온초전도 시스템 냉각용 고화질소의 기초 절연 특성", 대한전기학회논문지. Vol. 58, No. 1, Jan, pp. 132-136, 2009.