Fast Frequency Response (Special ADR)

by | Jan 26, 2021

GRIDlink utilizes the power and flexibility of Open ADR 2.0b to execute a rapid response to Under Frequency & Over Frequency using Special Events while also partisipating in Simple Events.

GL135relays Fast Frequency Response (Special ADR)

GRIDlink responds to Special Signals from the VTN executing Over or Under Frequency control strategies.

  • GRIDlink receives frequency reading every 1 second.
  • GRIDlink logs line frequency in the GRIDview Cloud if desired.
  • The system monitors both under and over frequency.
  • The user can set under and over frequency threshold limits with dead bands.
  • If the frequency drops below the threshold, Digital Output 5 will provide a 24VDC output to change the state of a relay to shed  load.
  • For over frequency, Digital Output 6 can be configured to change the state of a relay to consume energy.
  • A timing element requires the frequency go above or below the threshold for a configured amount of time before tripping the relay.

Proven in actual applications by Hawaiian Electric (HECO), Honeywell CPFD US, Honeywell / Pearlstone UK. 

 

 

Technical Reference ..