Voltage Stability Based Formation of Voltage Control Areas Considering Impact of Contingencies

This paper presents a new approach for formation of voltage control areas (VCAs) based on sensitivity of reactive power generations with respect to reactive power demands, together with bus voltage variations under contingencies. The load buses in geographically compact region showing similar sensitivity of reactive power demand to reactive generations have been clubbed together to form voltage control areas. The voltage control areas so formed have been modified based on voltage variations under contingencies at different loadings. Case studies have been performed on IEEE 14-bus system. The VCAs formed by proposed method have been compared with VCAs formed by few existing approaches. The superiority of proposed approach of voltage control areas formation over few existing approaches has been established on the test system considered.