| Autor: |
Andjelic, Z., Krstajic, B., Milojkovic, S., Blaszczyk, A., Steinbigler, H., Wohlmuth, M. |
| Jazyk: |
angličtina |
| Rok vydání: |
1992 |
| Zdroj: |
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Scientific series of the International Bureau 10, I, 79 S. (1992). |
| Popis: |
In addition to the laws of the physics of electric discharges, the knowledge of the electric field is the basis of the design of insulation systems in high voltage engineering. Although the properties of the insulation material andthe environmental conditions are important, the electric field strength is ultimately the decisive parameter for the appearance of electric discharges. Particularly in the case of gas insulated substations, the predeterminationof discharge voltages based on the knowledge of electric field distribution is an essential step during the design process. In the past, experimental methods were used to determine the electric field, for example the electrolytic tank or semiconductive paper. Now these methods have been successfully replaced in most cases by numerical field calculation, and the recent developments in computer technology open new and interesting possibilities for the future. A variety of numerical methods and computer codes are available for both 2D and 3D electric fields. Whereas in the past the calculation of 3D electrostatic fields with out symmetry was limited to main frame computers only, there are now possibilities to calculate these fields on graphic workstations and even on personal computers as well. Many computer codes are available for the calculation of electric fields based on Finite Element Method (FEM). In the application of this method the whole space of interest must be subdivided into elements. One advantage of this discretization procedure is that the possibility of nonlinear properties of the space can be taken into consideration. On the other hand, this kind of discretization may result in a very high number of elements, especially in the case of 3D fields without any symmetry or in such cases where a very dense nodal distribution is necessary. An alternative to the widely used FEM arc so called integral [...] |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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