Launched in the summer of 2018, the HeatFlex research project aims to exploit the potential for grid stabilisation that small and decentralised consumer devices can offer – if actively involved in the stabilising process. The founding project members are TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO), and the southern German distribution system operator (DSO) Bayernwerk Netz. Following the successful cooperation and positive test results, TenneT and Bayernwerk Netz are now expanding the project. The grid operators are pleased to welcome three new project partners: the DSO Regensburg Netz as well as the public utilities Stadtwerk Haßfurt and SWW Wunsiedel.
With HeatFlex, TenneT and Bayernwerk are jointly researching the most effective integration of decentralised devices – such as electric storage heaters, heat pumps, and water heaters – into grid balancing. These flexible capacities are intended to avoid cost-intensive interventions by the TSO in the case of future grid bottlenecks. Since November 2019, the project partners have already been implementing the first concrete measures based on HeatFlex results: The heat pumps and direct heating systems connected to Bayernwerk Netz are being intelligently controlled for bottleneck prevention. Decentralised heating systems are thus partially taking over the stabilising function of fossil plants. Using ripple control technology already in place, no additional investments are required.
The increase in partners should serve to make intelligent use of even more local flexibility and to investigate further controllable, decentralised consumption units and alternative applications. The ultimate aims of HeatFlex are cost savings, reduction of grid extension, and the acceleration of the energy transition without jeopardising system security. “The intelligent control of the smallest, decentralised electricity consumption units is a small but essential element,” explains TenneT Managing Director Tim Meyerjürgens, “because the many pieces of the puzzle together make up the overall picture of the energy transition”.