A recent study published in ‘IEEE Access’ introduces a groundbreaking method for quantifying energy flexibility, a crucial element in managing the integration of distributed renewable energy sources. Led by Freddy Plaum from the Department of Electrical Power Engineering and Mechatronics at Tallinn University of Technology in Estonia, the research highlights how aggregators can better utilize the energy flexibility of prosumers—individuals or entities that both consume and produce energy.
Energy flexibility aggregation is becoming increasingly important as the energy landscape shifts towards more decentralized and renewable sources. As these sources can be variable, understanding how to manage and optimize energy use becomes essential. The new quantification method proposed by Plaum and his team focuses on creating flexibility curves, which illustrate the relationship between flexible power and its sustained duration. This approach takes into account the asymmetric and non-linear characteristics of energy flexibility, offering a more nuanced understanding than previous methods.
The study includes a simulation-based case study that models the thermal behavior of residential heating systems, specifically examining 1,000 heat-pump-based buildings. The findings reveal that the power available for flexibility activation is significantly influenced by how long that power can be sustained. “We found that the power at which the flexibility can be activated highly depends on the activation duration,” noted Plaum. This insight allows aggregators to make more informed decisions about when and how to deploy energy resources.
Another critical aspect of the research is the identification of rebound effects, which occur when energy systems return to their original state after being activated for flexibility. The study found that these rebound effects can be considerable, with energy consumption potentially spiking to 1.8 times the amount used during the activation itself. This phenomenon, described as rebound overshooting, highlights the importance of careful planning and management in energy systems to avoid unintended spikes in energy use.
The commercial implications of this research are significant. Energy aggregators and utility companies can harness this quantification method to optimize their portfolios, potentially reducing costs and enhancing the reliability of energy supply. By better understanding energy flexibility, companies can create more efficient demand response programs, improve grid stability, and facilitate the integration of renewable resources.
As the energy sector increasingly moves towards sustainability, tools that enhance the management of energy flexibility will be vital. Freddy Plaum’s research provides a promising avenue for aggregators looking to navigate the complexities of energy consumption and production in a decentralized environment. For more information about his work and the potential applications of these findings, you can visit the Department of Electrical Power Engineering and Mechatronics at Tallinn University of Technology.
