Fault-Induced Delayed Voltage Recovery Assessment based on Dynamic Voltage Indices

This paper presents a new methodology for assessing fault-induced delayed voltage recovery (FIDVR) problem sin power systems based on the calculation of dynamic voltage indices. The indices allow obtaining information on the power system post-contingency dynamic behavior. As part of the methodology, the calculation of instantaneous indices (voltage index -VI), indices per time window (dynamic voltage index DVI), per bus (DVI_b) and of the whole system (wide-area dynamic voltage index - WADVI) is proposed. These indices are compared with thresholds to determine buses with delayed voltage recovery problems. Case studies were simulated in the New England 39 bus test system in which the proposed methodology was implemented. The methodology is used to identify voltage recovery problems from a low computational time procedure, with which indices are obtained that allow determining the location and magnitude of delayed voltage recovery events.