Background: Parallel to the further expansion of electricity generation from renewable energies, the challenges for secure and stable grid operation will continue to increase significantly at all voltage levels in the coming years. The “already developing” low-voltage flexibilities, such as electric cars, heat pumps or home storage systems, can contribute to all congestion-related challenges. However, there is currently a lack of appropriate preventative instruments in the congestion management toolbox, with corresponding coordination across all voltage levels.

Study content: On behalf of Amprion, E.ON, TenneT and TransnetBW, E-Bridge investigated two concepts and examined how these concepts can be implemented: The complementary market-based redispatch and the envelope curve approach. Participation in the concepts is voluntary for all parties.

Recommendation based on the results: The advantages of complementary market-based congestion management and the envelope curve approach should be tested jointly, promptly and under real conditions by means of a pilot phase up to 2030. Otherwise, the opportunity to integrate the great potential into congestion management will be lost. An implementation plan with step-by-step piloting on a voluntary basis was developed for this purpose.

E-Bridge is happy that we were able to support TransnetBW GmbH, TenneT TSO GmbH, E.ON and Amprion GmbH on this important topic. The next steps should now be taken together with the partners on the market side. E-Bridge is also looking forward to supporting this project.

You can find the key results here (only German language): Slider_Congestion management

You can find the complete study here (only German language): https://www.transnetbw.de/de/newsroom/pressemitteilungen/kleinstflexibilitaeten-als-beitrag-fuer-das-netzengpassmanagement