ABSTRACT
This chapter presents a general discussion of concepts related to grounding and transients of power system. It introduces the typical designs of transmission circuits and discusses the major design factors. Many power system analysis problems deal with the power system operating under steady-state conditions. The generating units of the system generate nearly sinusoidal voltages and currents. The majority of power systems comprise three-phase arrangements. In general, a three-phase system is constructed with single elements that are connected in a three-phase arrangement. Power transmission lines are designed to transmit ac or dc electric power. Ac transmission lines may be three-phase or single-phase. A distribution system comprises power lines and voltage-step-down equipment for electric service at industrial, commercial, and residential sites. For several technical and safety reasons, electric power installations must be grounded. Grounding of power systems is achieved by embedding metallic structures into earth and electrically connecting these conductors to the neutral of the power system.
