Comparative implementation of graphene sheet insulation heat effect in dry-type transformers


TÖREN M. , Celebi M.

THERMAL SCIENCE AND ENGINEERING PROGRESS, vol.26, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 26
  • Publication Date: 2021
  • Doi Number: 10.1016/j.tsep.2021.101131
  • Title of Journal : THERMAL SCIENCE AND ENGINEERING PROGRESS
  • Keywords: Dry-type transformer, Insulation, Lifetime, Thermal analyze, Graphene Sheet, HOT-SPOT TEMPERATURE, OIL

Abstract

Since the distribution transformers are widely used in industry, many variables, including materials, methods, and manufacturing processes directly affect its lifetime. The dry-type transformers are usually used in inner applications while heat dissipation directly influences the lifetime of a transformer, a significant improvement in this area, will result in further design like using the dry-type transformer in a closed box for outdoor applications. The reduction of the internal temperature of DTT also will conclude the reduction of its size. According to insulation properties of graphene sheet, the contribution of insulation of the winding and core is examined. Since the dry-type transformer uses standard oil-immersed paper insulation, the heat dissipation performance could be improved by addition of graphene sheet material. The results of this study showed that the graphene sheet provided a better heat transfer performance than the standard insulation, with decreases of 13-27% in the winding temperature and 24-37% in the core temperature.