Sensitivity based expert system for voltage control in power system

Abstract

An expert decision support system has been developed in this paper for voltage control in a power system network. A centralized control strategy has been evolved to correct any deteriorating voltage condition in the network by suitably adjusting the P-V bus voltages, transformer taps and shunt capacitors/reactors. The appropriate control steps are chosen by the sensitivity of these control measures to the affected buses and their available control margin. The proposed methodology is compared with a decentralized method of Wagner et al.2,3. The test result reveal that the proposed method is more accurate and requires less control steps compared with the decentralized method. © 1993.