Application of E-Field Adaptive Insulator for DC GHe-Insulated Pipeline

In order to improve the insulation design of future gaseous helium (GHe) insulated pipelines for integrated energy systems, this paper proposes a new concept with the application of the E-field adaptive insulator in dc GHe-insulated pipeline. By designing a reasonable spatial conductivity profile of the insulator, the E-field distribution can be significantly improved. As the iteration step increases in the optimization procedure, the E-field distribution becomes increasingly uniform along the insulator surface. However, the grown leakage current caused by higher volume conductivity should not be ignored. In practical application, a balance point must be found between the E-field distribution and leakage current. For the insulator proposed in this paper, the superior E-field nonuniformity factor is 1.1.