高电压技术2013，Vol.39Issue(1)：96-102,7.DOI:10.3969/j.issn.1003-6520.2013.01.014
220kV/3kA冷绝缘高温超导电缆电流引线设计
Design of Current Leads for 220 kV/3 kA Cold Dielectric High Temperature Superconduction Cables
摘要
Abstract
Optimization design, including optimization of minimum heat-leakage and electrical insulation for current leads, is a significant aspect in the terminal design of 220 kV/3 kA cold dielectric (CD) high temperature superconducting (HTS) cables. We analyzed the heat leakage of conduction-cooled current leads made from copper or aluminum according to the Weidemann-Franz law, and obtained parameters, such as length, cross section, and radius, on condition of the minimum heat-leakage by using the average-value method. The results show that, carrying 3 kA current, copper leads with cross section of 240 mm2 and length of 309. 6 mm, and aluminum leads with cross section of 400 mm2 and length of 308. 0 mm can meet requirements of the minimum heat leakage design, and the corresponding single conductor heat leakage will be 42. 7 W and 43. 1 W per kA current, respectively. DW-3, a kind of epoxy resin which could withstand ultra-low temperature, was chosen as the insulation material of conduction-current leads, then AC breakdown strength of processed current lead samples at liquid N2 temperature (13 kV/mm) was obtained. Moreover, the relationship between the DW-3 insulation thickness and the inner radius of cryogenic terminal was obtained by the experimental results. Generally, an insulation thickness of 22. 0 mm and 21.5 mm for copper leads and aluminum leads respectively in a 220 kV cryogenic terminal with inner radius of 140 mm can satisfy the cryogenic insulation requirements and match normal 220 kV room-temperature terminals.关键词
高温超导(HTS)电缆/电流引线/漏热/低温绝缘/击穿场强/终端Key words
high temperature superconducting (HTS) cable/ current lead/ heat leakage/ cryogenic insulation/ breakdown strength/ terminal引用本文复制引用
程远,王银顺,郑志强,张肖杰,薛驰,赵连岐..220kV/3kA冷绝缘高温超导电缆电流引线设计[J].高电压技术,2013,39(1):96-102,7.基金项目
国家自然科学基金(51077051). （51077051）
