Abstract
This paper deals with a “combination method” in which the charge simulation method is combined with finite element method, for electric field calculation. The proposed method has the advantages of both charge simulation method and finite element method, while making up of their disadvantages. In the combination method, field is divided into two regions, one covered by the charge simulation method and the other by the finite element method. These two regions are combined using the continuous conditions for potentials and dielectric flux densities at the boundary. The new method could be applied to non-enclosed multi-dielectrics fields, space charge fields, fields with leakage current and so on. Examples of calculation have revealed that the method affords satisfactory calculation accuracy in application to high voltage power transformer apparatuses.
Highlights
THE ELECTRIC field calculation method has made a marked advance with the recent development of the computer, providing many fine results in various fields including the high voltage technique
The so-called combination method that combines the optimization theory based on charge simulation method and the finite element method has the following features
Calculation accuracy required to the high voltage power transformer apparatuses is fully met
Summary
THE ELECTRIC field calculation method has made a marked advance with the recent development of the computer, providing many fine results in various fields including the high voltage technique. As the major numerical electric field calculation methods, there are a charge simulation method, a finite difference method and a finite element method [1-2-3]. Each method has its own advantages and disadvantages [4-5]. The desirable method should be used according to an application field. Combining several calculation methods allows their advantages to be used and their disadvantages to be removed. This combination method can be applied to more extensive fields and will contribute to efficient calculation in many points such as accuracy and calculation time [6-7]
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