Finite Element Method and Charge Coupling Method for Distortion Field of AC Transmission Line

Abstract

The numerical calculation of electromagnetic field has always played an important role in engineering practice. Different numerical methods, such as finite element method, simulated charge method, boundary element method and moment method, have been summarized for different applications. These numerical methods have led to their simulation because of their own mathematical model, theoretical basis and assumptions. The limitations of the occasion promote the rational application of different numerical calculation methods in different electromagnetic field projects. However, in the face of complex engineering applications, these limitations often expose the disadvantages of single numerical calculation method, reduce the efficiency of simulation work, reduce the accuracy of simulation calculation and even make it impossible to carry out simulation work. In this paper, the advantages and disadvantages of the finite element method and the charge simulation method used in the numerical calculation of electromagnetic field are compared and analyzed. The theory and method of coupling simulation calculation of complex electric field model are proposed. The method is used to calculate the distortion electric field model of UHV AC transmission line. The results show that the coupling method of finite element method and simulated charge method can significantly improve the efficiency and accuracy of simulation calculation, and is more suitable for engineering practice.