1Research Scholar, Uttarakhand Technical University, Dehardun, (Uttarakhand), India
2Department of Electrical Engineering, Laxmi Devi Institute of Engineering & Technology, Alwar, Rajasthan, India
3Department of Electrical & Electronics Engineering, Vishveshwarya Institute of Engineering &Technology, Dadri, G.B. Nagar, (U.P.), India
One of the key parameters in substation grounding design is to calculate accurately the grounding resistance of the system. The substation grounding grid resistance to be used to design a safe grounding system has been receiving a lot of attention in recent years. It is important that the substation ground has a low ground resistance, adequate current carrying capacity, and safety features for personnel and equipment. A good grounding system provides a low resistance to remote earth in order to minimize the GPR. For most transmission and other large substations, the ground resistance is usually about 1 Ω or less. In smaller distribution substations, the usually acceptable range is from 1 Ω to 5 Ω, depending on the local conditions. In this paper the various parameters affecting the calculation of substation grounding grid resistance is briefly explained.
Grounding, Ground Resistance, Resistivity, Grounding Grids, Substation
