Details

Autor(en) / Beteiligte

• Heo, Jeong Il
• Hong, Jong Gi
• Nam, Seokho
• Kang, Hyoungku

Titel

Dielectric Design of Current Lead Parts for a 154 kV Superconducting Apparatus

Ist Teil von

• Journal of superconductivity and novel magnetism, 2013-04, Vol.26 (4), p.1259-1263

Ort / Verlag

Boston: Springer US

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Currently, studies on the development of high voltage superconducting machines are being conducted actively in many research institutes all over the world (Kang et al. in IEEE Trans. Appl. Supercond. 17:1493–1496, 2007 ). In this paper, a sub-cooled liquid nitrogen cooling method is considered to design current lead parts for a 154 kV superconducting apparatus because of its excellent dielectric and mechanical characteristics (Kang et al. in IEEE Trans. Appl. Supercond. 17:1493–1496, 2007 ). Insulation gases such as SF 6 , CF 4 , and N 2 are considered as suitable pressurization gases for enhancing the dielectric characteristics of a superconducting system in the Republic of Korea (Kang and Ko in IEEE Trans. Appl. Supercond. 21:1332–1335, 2011 ). Dielectric experiments are conducted on GFRP (glass fiber reinforced plastic) and insulation gases (SF 6 , CF 4 , and N 2 ) with various pressures to establish experimental criteria for designing current lead parts for superconducting applications. It is found that the criteria for calculating electrical breakdown voltage at sparkover of GFRP and insulation gases conform to the mean electric field intensity and the maximum electric field intensity, respectively. Also, the criteria for calculating the electrical breakdown voltage at sparkover according to various conditions are derived. Finally, the conceptual dielectric design of current leads for a 154 kV superconducting apparatus by applying the presented criteria is performed considering various safety factors.