Dynamic ADR

May 21, 2021 | Available Software Modules, Open ADR Resources

Control logic executed in an OpenADR End Node that changes via Special 2.0b Signals and surrogates.

Edge Computing & Control that permits high granularity facility configuration to protect equipment, lower impact and maximize efficiencies.

Extended Capabilities Software for OpenADR
provides logic to control relays and analog outputs in to respond to changes in Grid:

  • W / kW
  • Frequency
  • VAR / kVAR
  • Volts / Volts Unbalance
  • Price

GRIDlink responds to OpenADR 2.0b Event Signals changing Energy Management strategies on the fly.

Dynamic Energy Management
  • Lighting Systems (On-Off, Dim)
  • HVAC Systems (Fan Speed, Temperature Setback Chillers)
  • Battery Storage Systems (Store, Inject, Standby)
  • Generators
  • Rotating Equipment (On-Off Variable Speed)
  • Food Cold Storage (Temperature Setback)

An OpenADR 2.0b signal can change strategies, set points, proportional PID or ON-OFF outputs using a combination of Signal Name, Type & Value.

  • Strategies are pre-configured and can change from one control variable such a frequency to another such as Volts, kW or temperature.
  • GRIDlink can connect to any Modbus Meter or other sensor via Ethernet, RS485 or analog inputs .
  • Data can be averaged or instant.
  • Resources can be earmarked for specific Events.
  • Relays can be grouped, prioritized and have adjustable deadbands for smooth control.
  • Analog Outputs can be On board 4-20mA or virtual accessible by Modbus.


As an OpenADR VEN (Virtual End Node), GRIDlink connects to the Utility’s VTN (Virtual Top Node) and receives a 2.0b Special signal which declares an Under Frequency condition on the grid.

In a bottle manufacturing facility, a GRIDlink is connected to a Modbus meter and a number of loads such as air compressors, fans and a bank of batteries. The GRIDlink will shift it’s control logic to commit resources to shed enough load and/or inject stored energy from the batteries until the frequency is within acceptable limits.

This is accomplished through a PID loop which will shed a proportional amount of the available load based on the set point offset. The process variable being frequency. This will be a continuous control logic for the duration of the Event.

A logic for Over Frequency is also possible. The process variable can be any variable provided by a meter or external sensor.

In subsequent Events, the GRIDlink will respond to all traditional signals.

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