Effect of high speed reclosing on fault induced delayed voltage recovery

This paper presents the effect on fault induced delayed voltage recovery (FIDVR) of high speed reclosing onto a fault. As most of the faults on the system are temporary or transient faults, auto-reclosing is widely used across the industry to reduce the outage time. However, if the voltage recovery following clearing of a fault is slow and if the fault is permanent in nature, auto-reclosing on to a fault could increase voltage recovery time significantly. This is especially true for the case where the fault cannot be cleared instantaneously. This is may be because the line does not have a pilot protection scheme or the pilot is out of service and the fault is located outside the zone 1 reach of the reclosing end breaker. This paper presents the simulation of this scenario on some of the 230kV lines around the metro Atlanta area. Finally, this paper also discusses a few solution options, if auto-reclosing onto a fault poses a threat of a FIDVR event.