DYNAMIC AND STATIC VOLTAGE STABILITY ENHANCEMENT OF POWER-SYSTEMS

The static voltage stability and the dynamic voltage stability are int egrated. To consider a shunt compensator and/or a more general load wh ich is dependent on voltage, a modified criterion for the static volta ge stability is developed and the system is controlled to satisfy this static stability criterion. For an accurate analysis of the dynamic v oltage stability, the system model includes excitation systems, tap-ch angers, capacitors and power system stabilizers in addition to network equations. A parameter optimization technique with a modal performanc e measure is developed to determine optimal control parameters for dyn amic voltage stability enhancement.