An integrated model of modern power system in the presence of TCSC and STATCOM controllers to assess global voltage stability

Assessment of voltage stability of a multi-bus power network in an equivalent mode is a new era of research in the field of power system operation and control which may prevent the system for unusual voltage collapse in a faster way. As FACTS controllers are now an inescapable part of power system, in this paper two major FACTS devices i.e, Thyristor controlled series capacitor (TCSC) and Static synchronous compensator (STATCOM) are modeled for steady state load flow analysis to assess voltage stable states of any interconnected power system in terms of its reduced two bus integrated equivalent system. The proposed methodology has been applied under simulated condition on IEEE 57-bus test system to illustrate the proposed methodology using a voltage stability indicator being derived from developed equivalent model.