Computer aided design of grounding system for high voltage test laboratory

This paper presents Computer Aided Design (CAD) CYMGRD so are which assists engineers to design grounding facilities for substations and buildings. The program is used to perform soil resistivity measurement interpretations, elevation of ground potential rise and danger point evaluation within any area of interest. The soil module supports both "single-layer" and "two-layer" soil model analysis. The grid module computes the tolerable step and touch voltages. Surface voltage and touch voltage potential gradients at any point of interest within the area of investigation are computed. Equipotential contours for surface and/or touch potentials, and potential profiles showing touch and step voltages along the chosen direction are presented. Two and three dimensional plots are presented for the grounding grid of HV test laboratory in HEP NOC Velika. The safety of personnel and equipment in and around the grounding grid is satisfied.