Abstract
In large interconnected electric power systems the bus voltages of the feeding nodes are to be maintained at local optimum values. To avoid large information transmission networks this control task must be carried out by a decentralized control. bach control station has to ensure asymptotic regulation for the corresponding feeding node. Moreover, the controller parameters should be chosen so that the closedloop system remains stable even if several control stations are disconnected. By me ans of a necessary and sufficient condition for the existence of such controllers and the data of a real-existing power system with 20 feeding no des it is proved that vOltage control can actually be carried out in a decentralized way. As a byproduct, it is shown that this result holds for all systems with a ‘near-ideal’ voltage-reactive power behaviour.
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