Linear analysis with two linear models of a thyristor-controlled series capacitor

In this paper two reduced order models of a Thyristor-Controlled Series Capacitor (TCSC) are built. The models are identified from frequency response and time-domain simulation of the detailed original model of the TCSC. The reduced models are linear and with them, linear analysis can be done in a more proper way compared to do linear analysis with the detailed original model of the TCSC that contains non-linearities, for instance the thyristors as well as the non-linear control algorithm. The performances of the linear models are compared with the fully detailed original TCSC-model using linear analysis and time-domain simulations. When doing linear analysis with the original detailed model, eigenvalues derived from the control algorithm of the TCSC are generated. These are ignored in the two linear models.