Numerical calculation of AC substation grounding systems buried in a vertical multilayered earth model by higher-order basis function
Article first published online: 12 SEP 2011
Copyright © 2011 John Wiley & Sons, Ltd.
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields
Volume 25, Issue 3, pages 258–274, May/June 2012
How to Cite
Li, Z.-X., Fan, J.-B. and Yin, Y. (2012), Numerical calculation of AC substation grounding systems buried in a vertical multilayered earth model by higher-order basis function. Int. J. Numer. Model., 25: 258–274. doi: 10.1002/jnm.830
- Issue published online: 16 APR 2012
- Article first published online: 12 SEP 2011
- Manuscript Accepted: 20 JUL 2011
- Manuscript Received: 7 APR 2011
- China Electrical Power Research Institute
- Green's function;
- vertical multilayered earth model;
- high-order basic function
To study the accuracy of numerical simulations for an AC substation grounding problem embedded in a vertical multilayered earth model, this paper proposes a novel algorithm combining the rapidly convergent one-dimensional Galerkin's BEM with higher-order basis functions on the basis of the quasi-static electric field theory. General analytical formulas for the mutual impedance between any pair of short line conductors are also derived to accelerate the numerical integration. These formulas can work in not only complex space but also real space because of our application of the quasi-static complex image method, which is different from the contribution of other earlier scientists, whose formula can work just in real space. The algorithm can be used to simulate and analyze any grounding system, including those incorporating a floating grid located anywhere in the earth model. Copyright © 2011 John Wiley & Sons, Ltd.