A COORDINATED CONTROL OF VOLTAGE AND REACTIVE POWER BY HEURISTIC MODELING AND APPROXIMATE REASONING

This paper presents a flexible approach to a coordinated control of vo ltage and reactive power in order to enhance voltage security of an el ectric power system. The control strategy is expressed by simple rules , which measure the proximity of system state to certain operating con ditions, and utilize linear equations to obtain the effective control models. The desired control actions are determined by considering seve ral criteria at the same time. The procedure has been applied to a mod el system in order to verify its effectiveness. The simulation results show the advantages of this approach over conventional expert systems for voltage-reactive power control.