Abstract
It is important that study on cryogenic electrical insulation design to develop the cold dielectric (CD) type high temperature superconducting (HTS) cable because the cable is operated under the high-voltage environment in cryogenic temperature. Therefore, this paper describes a design method for the electrical insulation layer of the CD type HTS cable adopting the partial discharge (PD)-free design under ac stress, based on the experimental results such a partial discharge inception stress (PDIE) and V– t characteristics, and an impulse breakdown strength of liquid nitrogen (LN 2)/laminated polypropylene paper (LPP) composite insulation system in which the mini-model cable is immersed into pressurized LN 2.
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