Broad-Band Equivalent Circuit of Grounding Grids Buried in Horizontally Two-Layered Soils: A FEM-VF Approach

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 471

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شناسه ملی سند علمی:

ELEMECHCONF05_115

تاریخ نمایه سازی: 21 خرداد 1398

چکیده مقاله:

In this paper, we investigate effect of horizontally two-layered soil on the equivalent circuit of grounding grids in comparision with hemogenous 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 hemogenous 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.

نویسندگان

Ali Bagheri

MSC student from Arak University, Engineering Department, Arak, Iran.

Saeed Reza Ostadzadeh

Assistant Professor from Arak University, Engineering Department, Arak, Iran