Thyristor controlled series compensation: some aspects of different circuit parameters and voltage stability margin

Variable series compensation allows power transfers to be increased and controlled in the UHV transmission lines. Much attention has been focused on using power electronics to improve the speed control of variable series compensation. Several devices have been presented. The main circuit studied is the thyristor controlled series compensator (TCSC). This paper presents a time domain simulation of the TCSC circuit. The analysis is performed by a simulation program based on Bergeron´s method. The study of the TCSC module operation in an electric line shows that TCSC modules enable the transmission line performance to be improved (variable compensation), without introducing too many harmonics to the system