"MASTER CONTROLLER CONCEPT FOR POWER FLEXIBLE ENERGY SYSTEMS"
According to Energinet, the need for flexible grid-connected capacity that can participate in ancillary services will only increase in the future with the expansion of renewable energy production.
By using Modelica we have developed a control concept that explores the benefits of aggregating grid-connected units with different load changing characteristics to improve the combined power response of the power or district heating plant.
This paper, presented at the Modelica Conference 2025, displays a master controller concept that aggregates electricity producing and consuming units of a power-to-heat district heating plant.
Master controller concept for power flexible energy systems
ABOUT THIS PAPER:
The 16th International Modelica Conference 2025 was held in Lucerne, Switzerland.
And we were there.
At the conference, Thomas Egsgaard Kallesen presented our paper on "Master controller conpect for power flexible energy systems"."
We hope you find the paper abstract interesting:
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A generic model of a master controller concept is presented to demonstrate the advantages of aggregating multiple flexible electrical power units. The master controller consists of various submodels with different features.
A Power Balancing Controller ensures that the operation does not cause any imbalance with the traded power.
A waterfall method that ensures that any ancillary service activations are handled using the appropriate units to obtain cheapest operation. Simulations of the concept include examples of step responses on aFRR activations, as well as actual aFRR data from the Danish TSO.
The results suggest that if the system consists of slow units, the aggregation of units can increase the capacity offered to faster types of ancillary services. Additionally, by allowing certain units to shut down automatically more capacity can be offered as the units are no longer bound by minimum loads.”
We use dynamic simulation and model-based design because it saves both time and money for the customer. For example, before commissioning, we can simulate different operating situations and thus identify and eliminate any errors.
Our CASES illustrate how we use dynamic simulation and model-based design when replacing fossil fuel with sustainable energy technologies.
Our paper is published by Linköping University .
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