Improved accuracy of electro-quasistatic simulations of large-scale 3D high voltage insulators with nonlinear material layers

摘要

Purpose - The purpose of this paper is to analyze the accuracy of finite element method simulations for high voltage equipment featuring resistive field grading. Design/methodology/approach - In such simulations, the order of the mesh used and the polynomial order of the ansatz functions are varied while maintaining mesh and simulation parameters. The resulting accuracy of the simulations is analyzed by an error convergence study which shows the relative errors against the number of degrees of freedom the computational time and the memory consumption. Findings - Simulation results of simplified benchmark geometry and applications to large-scale 3D high voltage equipment are presented herein. Originality/value - The impact of the order of the mesh and the Ansatz functions are studied for realistic high voltage setups. The paper helps the user of simulation software to choose adequate simulation parameters.