ENHANCEMENT OF STEADY-STATE VOLTAGE STABILITY BY STATIC VAR COMPENSATORS

Steady-state voltage instability can certainly be enhanced by static V AR compensators which can hold certain node voltages constant and crea te infinite buses within the system nodes. Static VAR compensator para meters needed for this purpose are found. Controller gains, droop slop es, reference voltages and compensator ratings are determined for main taining the load node voltages constant irrespective of system loadabi lities to values which lead to voltage instabilities. Influence of sys tem equivalent impedances on these parameters is finally discussed. (C ) 1997 Elsevier Science S.A.