Report on geoelectrical characteristics of the soil at the site TS 110/10(20) kV Policnik

Stanko Milun, Goran Petrović, Tonko Garma, Dražen Rubinić

January 2012

Abstract

An important prerequisite for the correct and economical dimensioning of the earth electrode is the knowledge of the geoelectric properties of the soil, i.e. the soil resistance as a function of spatial coordinates. At the location of the future substation, sounding curves were recorded at 13 points evenly distributed over the substation surface. The measurements were performed using the vertical electrical sounding (VES) method (Chapter 2), with the Schlumberger probe arrangement, with overlapping. Given the approximate area of the substation (100 m × 100 m), a ‘sounding depth’ of 45 m was selected, which approximately corresponds to the equivalent radius of the earth electrode. The measurement results were statistically processed with the aim of objectively assessing the expectations of the geoelectric profile. The interpretation of the sounding curves was performed using the least squares method, using the Hook-Jewees numerical method.

Type

Report

Geo Electrical Characteristics Vertical Electrical Sounding

Stanko Milun

Full Professor

Faculty alumnus with a research focus in the development of measurement methods in high-voltage systems, signal analysis in electrical power systems, and the application of geoelectrical methods in energy infrastructure. Prof. Milun has been involved in numerous scientific projects, including those related to the optimization of grounding systems for high-voltage plants and the development of transient measurement methods. He has authored 38 scientific papers and over 150 professional studies.

Goran Petrović

Full Professor | Department of Electrical Measurements

Prof. dr. sc. Goran Petrović is a full professor at the Faculty of Electrical Engineering, Mechanical Engineering and Architecture in Split. His research interests include measurement of electrical and process quantities, analysis of geoelectrical and geothermal features of the soil, instrumentation for smart grids, measurement and application of synchrophasors. He is the author of numerous papers published in top-tier scientific journals and contributed to valuable international and national scientific projects.