[PDF] Top 20 TítuloA boundary element formulation for the substation grounding design

... KEY WORDS : Earthing Computation, Boundary Element Metho ds, Grounding Grid Design.. 1 Intro duction.[r] ... See full document

... por boundary integral equa- tions, las cuales est´ an definidas en las superficies de los dominios de los electrodos y la subestaci´ ...tres boundary integral equations que permitir´ an la resoluci´ on del ... See full document

... In the last threee decades, several procedures and methods for substation grounding design and computation have been ...on the basis of intuitive ideas, such as superposition of ... See full document

... finite element method for the generalized Stokes prob- lem. The approach, which is a natural extension of a previous procedure applied to quasi- Newtonian Stokes flows, is based on the ... See full document

... "A Boundary Element Numerical Approach for Substation Grounding in a Two Layer Earth Structure".. I..[r] ... See full document

... "A General Formulation based on the Boundary Element Method for the Analysis of Grounded Instalations in Layered Soils".. (Editors); Computational Mechanics Publications, South[r] ... See full document

... On the other hand, to obtain highly accurate solutions by means of standard techniques (FEM, Finite Dierences) should imply unapproachable computing requirements; analytical solutions ar[r] ... See full document

... A Boundary Element approach for the analysis of substation earth-. ing systems has b een presented[r] ... See full document

... illustrates the basic elements involved in modeling concrete encased electrodes: a rectangular concrete block buried in horizontal position in the soil and comprising a cylindrical electrode inside ...it. ... See full document

... "A Meshless Numerical Formulation for the Solution of Potential Problems in Engineering Applications".. O'Donoghue (Editors); Tech Science Press, Palmdale, CA, USA.[r] ... See full document

... are the Johnson–Nedelec method (cf. [14]) and the symmetric method ...used for the elasticity problem. It consists in dividing the exterior domain into a bounded inner region and an ... See full document

... because the existence of energy trans- fer from low to high frequency modes of the ...solution. The size of the dis- cretization seemed not to be ...be the only way to provide ... See full document

... of the FEM–BEM method introduced by Costabel [Boundary El- ements IX, ...estimates for the Galerkin method and propose a fully discrete scheme based on simple quadrature ...preserve the ... See full document

... a grounding system are to guarantee the integrity of equipment and the continuity of the service under fault conditions and to safeguard that persons working or walking in the ... See full document

... domain. The meshes were locally refined at the non- convex corner at the origin; the number of elements and sizes are given in Table ...of the five grids that were used are depicted in ... See full document

... Since computation of potential is only required on the earth surface 0E , and the equivalent resistance can be easily obtained in terms of the leakage current 2, a Boundary Element appro[r] ... See full document

... As for the second contribution to Eq. (2), it involves the variation dU of the flow variables under the ...from the solution of the linearized flow equations (subject to ... See full document

... "A general numerical model for grounding analysis in layered soils" I. Topping (Editors); Civil-Comp Press, Edinburgh, UK.[r] ... See full document

... "A General Numerical Model for Grounding Analysis in Layered Soils" I. Casteleiro (2002)[r] ... See full document

... To alleviate this drawback, one possibility lies in the use of a model reduction (based on the Karhunen-Loeve decompo- sition—KLD—, also known as proper orthogonal decompo- sition—POD—[r] ... See full document