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Saeedreza Ostadzadeh

Saeedreza Ostadzadeh

Academic rank: Assistant Professor
ORCID: https://orcid.org/0000-0002-9463-5642
Education: PhD.
ScopusId: 15065733900
Faculty: Engineering
Address: Arak University
Phone:

Research

Title
Broad-Band Equivalent Circuit of Grounding Grids Buried in Horizontally Two-Layered Soils: A FEM-VF Approach
Type
Presentation
Keywords
Horizontally two-layered soil, vector fitting, grounding grid
Year
2019
Researchers Ali Bagheri ، Saeedreza Ostadzadeh

Abstract

In this paper, we investigate effect of horizontally two-layered soil on the equivalent circuit of grounding grids in comparison with hemogenثous soils. In extracting equivalent circuit, vector fitting method is applied to input impedance of the grid computed via the finite element method (FEM). The simulation results show that the input impedance of the grounding grids in horizontally two-layered soils is placed between the individual ones in hemogenثous soils with conductivity values of the first and second layers. This fact show that importance of including different layers of soil in extracting equivalent circuit which can be imported to EMTP software for accurate transient analyses of power systems under lightning return strokes.