Abstract:
As the power system is operated closer to the security limit, environmental constraints restrict the expansion of transmission network. The need for long distance power transmission has increased and little number of operators are engaged in the supervision and operation of power system. Voltage stability has become major problems in many power systems. Due to change in load and the drop in the load, voltage increased and demand for the reactive power increased. This change leads to a progressive & rapid change of voltage at that location, which may have a cascading effect on neighboring regions that causes voltage drop. In this paper, Static synchronous compensator (STATCOM) is used to maintain the voltage within the limits. STATCOM will manage the reactive power or extract the reactive power.

Keywords: FACTS, STATCOM, Voltage Stability, Reactive power