High Performance of Cryogenic Electrical Insulating System in DC Superconducting Cable

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K18019
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Toyohashi University of Technology
• Principal Investigator: Kawashima Tomohiro 豊橋技術科学大学, 工学(系)研究科(研究院), 助手 (70713824)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 極低温電気絶縁 / 絶縁紙 / 電荷侵入 / 直流 / 絶縁破壊 / 部分放電

Outline of Final Research Achievements

The development of high-temperature superconducting (HTS) cables have been tried around the world and the on-site test was done in actual power system. On the other hand, solar and wind power are expected to be used as new renewable energy source as a substitute for petroleum in the future. Usage of such new energies have a good compatibility with DC power transmission based on superconducting technology. However, DC HTS cable may raise the problem that the charge injection can degrade the insulating performance of insulating paper, which is the similar to the problem with the conventional cables such as oil immersion cable for DC. In this research, it was investigated the influence of charge injection on insulating paper at cryogenic environment and aimed to obtain the basic guidelines for optimal DC insulation design with suppressed charge injection.

Free Research Field

電気絶縁工学