Robust approximation rules for critical electric field of dielectric gas mixtures

Abstract

A semi-analytic method for quickly approximating the density-reduced critical electric field for arbitrary mixtures of gases is proposed and validated. Determination of this critical electric field is crucial for designing and testing alternatives to SF6_6 for insulating high voltage electrical equipment. We outline the theoretical basis of the approximation formula from electron fluid conservation equations, and demonstrate how for binary mixtures the critical electric field can be computed from the transport data of electrons in the pure gases. We demonstrate validity of the method in mixtures of N2_2 and O2_2, and SF6_6 and O2_2. We conclude with an application of the method to approximate the critical electric field for mixtures of SF6_6 and HFO1234ze(E), which is a high interest mixture being actively studied for high voltage insulation applications

    Similar works

    Full text

    thumbnail-image

    Available Versions