2025-09-09 –, Audi-Max
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.
Rene Just Nielsen holds a master’s degree in electrical engineering, specialised in process control, from Aalborg University, Denmark. Since his graduation in 2004 he has worked in the Danish energy sector, involved in both theoretical and practical aspects of electric power and district heating generation.
From 2004 to 2013 he worked at Ørsted, the largest energy company in Denmark, involved in power plant performance monitoring and troubleshooting, flexibilization and in-house development of steady-state simulation software.
In 2013 he joined Added Values, a new engineering consultancy company founded by five of his colleagues from Ørsted. Here, his work revolves around simulation-based analysis and development of control concepts for district heating systems and power grid ancillary services, as well as real-world commissioning of the developed products.
His first encounter with Modelica was at the conference in Hamburg in 2005. During the last 10 years he has been using Modelica on a daily basis in his work.