Design guide for outdoor AC substation earthing systems, with specific application to Eskom Bloemfontein distributor's requirements

Abstract

In modern high voltage substations, earthing has become one of the dominant problems of AC power system design. In order to understand the theoretical background and problems associated with earthing system design, various international guides were investigated and scrutinised. This investigation of the theory led to the analysis of general methods and techniques used for earthing system design. Due to the lack and short supply of human expertise in earthing system design, a computer program was developed on a Personal Computer, to help enhance and distribute the needed expertise . The purpose of this thesis is to provide a complete, pract i cal and scientific step-by- step guideline to design a safe and effective outdoor AC substation earthing system.