Linear Models of Non-linear Components

Simulation of electric power systems becomes more and more important in order to, among other things see through scenarios before they become real. Since power systems are more integrated and contain more complex components nowadays, the simulation is today a bigger task than decades ago. In parallel with the expansion of electric power systems, computers have made it possible to create models of distribution networks and of national power systems. This thesis is focused on the development of a detailed model of one of the newest products on the power system market: the Thyristor-Controlled Series Capacitor. From the detailed model later on a linear model is created. The linear model represents the fundamental behavior of the ThyristorControlled Series Capacitor. When using the linear model, simulations can be carried out faster and the whole power system can also be linearized in a more proper way since the developed, simpler model of the component is linear in contrast to the original one. The developed linear model is compared to the original model both in time domain simulations and by linearizations of a power system. TRITA-ETS-2001-04 · ISSN 1650-674X