Slope-Permissive Under-Voltage Load Shed Relay for Delayed Voltage Recovery Mitigation

@article{Halpin2008SlopePermissiveUL,
  title={Slope-Permissive Under-Voltage Load Shed Relay for Delayed Voltage Recovery Mitigation},
  author={S J Halpin and K E Harley and R. A. Jones and L Taylor},
  journal={IEEE Transactions on Power Systems},
  year={2008},
  volume={23},
  pages={1211-1216}
}
In this paper, a new relay algorithm is proposed for under-voltage load shedding (UVLS) based on rate of voltage recovery and predicted time to recover above a preset voltage threshold. Simulation experience in the Southern Electric System has shown that conventional UVLS relay logic is ill-suited to the task of mitigating delayed voltage recovery and fast voltage collapse situations while maintaining compliance with existing NERC Reliability Standards. The proposed scheme continuously monitors… CONTINUE READING
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