10 - Control of high short-circuit fault currents and fault current limiters

Abstract

High short-circuit fault currents in excess of ratings of substation equipment create a potentially overstressed condition that has to be addressed to maintain safety and reliability of supply. In this chapter, we describe some of the practical methods and techniques that may be used for the control and limitation of the magnitude of short-circuit currents in power system planning, development and design, and operational timescales. Various types of established and emerging state-of-the-art short-circuit fault current limiters that may be used to control and limit fault currents to safe values as well as their modelling and analysis techniques will be described.