Fault-Induced Delayed Voltage Recovery Mitigation by Load Shedding based on Dynamic Load Behavior

Abstract

The dynamic load, especially induction motors (IM), represents the driving force for fault-induced delayed voltage   recovery (FIDVR)  phenomenon [1]. This paper   proposes   a   methodology   to   identify   the induction motors responsible of FIDVR phenomenon in    order    to    guide    the    load    shedding    schemeparameterization (load sheddinglocation)  and mitigate  this  phenomenon  in  a  more  effective  way. The methodology uses voltage magnitude values from PMU devices to  detect  the  phenomenon  and  the  IM rotation speed to identify the  motors responsible for FIDVR. The proposed methodology is applied on the IEEE New England 39-bus test  system,  in which the load  shedding  scheme  based  on  IMs  behavior  is compared  with  a  conventional  UVLS  scheme.  The results show that the load shedding scheme based on IMs behavior is more effective since it sheds less load amount and at the same time it achieves compliance with post-fault transient voltage recovery criterio.