A Fabrication Method for Adaptive Dielectric Gradient Insulating Components

TL;DR

This paper introduces a novel fabrication method for adaptive dielectric gradient insulators that enhances electric field mitigation and increases flashover voltage, with potential for industrial application.

Contribution

The paper presents a new in situ AC electric field-based fabrication technique for dielectric gradient components, improving insulation performance.

Findings

Flashover voltage increased by 12.8% compared to homogeneous insulators.

Further 20.8% improvement with metal particles on the surface.

Greater initial electric field non-uniformity leads to larger voltage enhancement.

Abstract

Dielectric gradient components have advantages in electric field mitigation and insulation improvement. In this paper, we propose a fabrication method for adaptive dielectric gradient components using in situ AC electric field, including the mechanism and the corresponding operational procedures for industrial applications. Based on the electric polarization and self-assembly effect of the filler particles in the liquid matrix, the chain-like structure in the high field strength region is constructed to enhance the local permittivity and mitigate the maximum of the spatial electric field. The dielectric gradient basin insulator is prepared by this method, and its flashover voltage is increased by 12.8% compared with that of a homogeneous dielectric basin insulator, and the improvement is 20.8% when metal particles are present on the surface. The more non-uniform the initial electric field is, the greater the improvement in flashover voltage. This method is expected to promote the industrial application of dielectric gradient insulating components.