We are primarily tasked with providing power transmission services, system services and facilitating the energy market. Our core tasks follow from our appointment as grid operator under the Dutch 'Elektriciteitswet' (E-wet) and the German 'Energiewirtschaftsgesetz' (EnWG).
Can interconnected home storage systems or electric car loading stations contribute to power grid stabilisation? TenneT is using innovative blockchain solutions in pilot projects in Germany and the Netherlands to facilitate flexible access to decentralised capacities.
Challenges inherent to the energy transition
The increasing proportion of renewable energy in electricity production poses growing challenges for transmission system operators. Since solar and wind power are subject to weather-dependent fluctuations, TenneT is looking for options for controlling infeed in a more flexible way and avoiding expensive network interventions to stabilise the power grid.
Storing renewable energy
If more wind power is generated than can be transported, wind turbines need to be locked. To date, the energy remains unused since there are no individual storage systems available for large volumes of power. By contrast, the number of home-based storage systems for private solar equipment and e-vehicle charging stations is continually growing. However, these capacities are scattered across wide distances.
A ‘blockchain’ is a database whose records, or blocks, are linked and secured cryptographically. It ensures an especially high level of transparency and enables transactions between market participants to be verified. Sounds complicated? It is. The most important aspect for TenneT: the innovative technology enables decentralised data exchanging which is as quick as it is secure.
The blockchain as a virtual power station
A pilot project is underway in the Netherlands with the energy company Vandbebron. This Amsterdam start-up is providing TenneT with flexible capacities from an interconnected pool of electric vehicles and charging stations. In a pilot project in Germany, sonnen from Allgäu, is providing TenneT with flexible capacities from interconnected home storage systems. The sonnen e-services control centre links home storage systems and adjusts charging management in line with the individual grid situation.
Pilotproject with sonnen
The pilot project should show how interconnected home storage systems can help manage bottlenecks in the grid and limit the amount of expensive wind farm locking that needs to take place.
The linked battery storage devices can absorb or emit any excess power in a matter of seconds where required. It thus contributes to reducing transport bottlenecks in the grid
It is still in the first test phase. By autumn 2017, it should be possible for linked home storage batteries to be continually utilised in congestion management. The results will be evaluated six months later and any necessary process improvements can be made and additional market participants can be included.
The sonnen Group, which also includes sonnen e-services, is the world’s leading manufacturer of home energy batteries. The company also has extensive experience in linking and managing decentralised batteries.
PROMOTioN & MIGRATE
TenneT is participating in two major European research programmes: PROMOTioN and MIGRATE. These programmes were initiated in response to new challenges related to the development of offshore power grids and the increasingly important role of solar and wind energy.Read more
Offshore projects Germany
TenneT is investing heavily in Germany to connect offshore wind farms in the North Sea to the German high-voltage grid.Read more
The project will be a world first: a section of superconducting cable of this length has not yet been installed anywhere else in the world.Read more