Correction of an Area of Vulnerability to Voltage Sags Based on the Relay Protection Cooperation for Distribution Network
Voltage sags'magnitude and duration both affect normal operation of sensitive equipment.The conventional characterization of an area of vulnerability to voltage sags(AOV)does not take into account the effect of cooperating ac-tion of protective relays on duration of voltage sags.In order to accurately characterize the AOV,typical protection actions were discussed and the duration of voltage sags in distribution network was evaluated.According to moment of relay acti-vation,modifications were made to AOV that only considers voltage sag magnitude,which proposed AOV correction method considering coordination of protective relays in distribution networks.The method was proved feasible and rational by analysis on IEEE 33-node standard test system.
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万方数据
维普
