ABSTRACT
It is important to study the transient behaviour of such active distribution networks as stability and reliability may be compromised due to the variation of renewable generation and switching of power electronic equipment. This chapter addresses the transient analysis of distribution systems through electromagnetic transient simulations. It considers a boost circuit to introduce the problem formulation and basic concepts of the electromagnetic transient simulation. For electromagnetic transient simulations, two approaches are used, i.e. nodal analysis and state space analysis. A numerical integration formula is used to discretize the differential equations corresponding to each element into algebraic equations. The first step of control system modelling is to write down the input–output equations of all the blocks of the control system. The chapter also shows the fault characteristics when no additional compensation control techniques are used. The voltage, current and active/reactive power wave forms under a two-phase short-circuit fault condition at Busbar B2 are shown.
