Transient studies of FACTS and Custom Power equipment

The use of computer programs in the simulation of flexible alternating current transmission systems (FACTS) and custom power (CP) controllers, including their controls, is extremely important for the development and understanding of power electronics-based technologies. They yield key information related to the performance of a system under any operating condition. This is not possible to achieve by analytical means. They allow the identification and assessment of the interaction among the various elements in a network. This chapter addresses the transient studies of electrical networks with embedded, power electronics-based FACTS and CP controllers. The transient response of any natural system is the way in which the response of the system behaves as a function of time. Electrical power networks, like other physical systems, are exposed to various forms of transient phenomena. Nowadays, fast variations of electrical parameters, such as voltage or current, are common because of the elaborated equipment and configurations used in power systems. The basic control schemes presented in this chapter are simple and easy to implement in any transient simulator.