Controlled series compensation in coordination with double order SVS auxiliary controller and induction M/C for repressing the torsional oscillations in power systems

Development of high voltage and high current rated power semiconductor devices has led to the flexible ac transmission systems (FACTS). This paper deals with the controlled series compensation for enhancing the power transfer capability of transmission line in coordination with SVS (double order static var system) auxiliary controller and induction machine for repressing the torsional oscillations in power systems. The IEEE first benchmark model is considered for study. The role of controlled series compensation is mainly to repress large power oscillations while that of induction machine is to damp low power perturbations. The SVS auxiliary controller has a significant effect on both. Computer simulations show that the proposed scheme is effective in repressing the torsional oscillations for all levels of series compensation over a wide range of operating conditions. (C) 2002 Published by Elsevier Science B.V.