Linear analysis of a two-area system including a linear model of a thyristor-controlled series capacitor

This paper describes a method to construct a linear model of a thyristor-controlled series capacitor (TCSC) by analyzing its response in a time domain simulation wherein the TCSC is represented by a detailed instantaneous value model. To create the linear model Matlab´s System Identification ToolBox is used. The linear model in the classic ABCD-form is included in both time simulations and linear analysis of the power system. With this technique, dynamic behavior of the TCSC are included in linear analysis of the power system. The studied power system is a simplified model of the TCSC compensated south-north link in Brazil. Comparisons between the linear and the instantaneous value model of the TCSC are performed. By using the linear model, simulations can be done much faster (the computing time is reduced) and still includes the dominant behavior of the TCSC