High potential of blockchained home storage systems

09.05.2019

Maintaining the balance of the transmission system despite volatility of renewables and lack of conventional operating reserves is an essential future concern of European transmission system operators (TSOs). In search of adequate balancing solutions, a worldwide unique pilot project for the blockchain-based networking of home storage systems was launched in 2017. The cooperation partners are TSCNET shareholder TenneT, the Dutch-German TSO, and sonnen, a company specialised in smart power storage. The promisingly completed pilot demonstrates the potential of blockchain technology to become a key application for the efficient provision of network stabilising measures.

The aim of the pilot was to test the suitability of blockchained storage systems for preventing emergency measures in the event of bottlenecks, e. g. the throttling of wind farms. To this end, TenneT deployed a virtual power station comprising of home storage systems specially provided by sonnen with a blockchain solution by IBM. The intelligent charge management of the battery storage systems adapted itself individually to the respective situation in the TenneT grid, whereby the batteries absorb or release excess current within seconds if required.

Manon van Beek, CEO of TenneT, comments on the succesful project: “We’ve shown for the first time how it’s technically feasible to utilise blockchain technology so households can stabilise the power grid via their home storage systems.” Actually, the results are so promising that TenneT intends to undertake further blockchain programmes, especially as by 2030 there could already be decentralised battery storage facilities in Germany with a total capacity of up to 10,000MW.

A pilot project by TenneT on blockchained home storage systems for grid stabilisation has proven the high potential of this technological approach (picture: edited screenshot taken from sonnen video “The largest virtual battery to compensate for fluctuations in the power grid”, YouTube)

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> See TenneT press release (html)

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Households supersede power plants

05.12.2018

It is widely known that the closure of conventional power plants in the course of the energy transition and the resulting decrease in operating reserve pose demanding challenges to transmission system operators (TSOs). They now have to compensate for this lost reserve to ensure stability of the transmission grid and secure the customer supply. In its search for new approaches, TSCNET shareholder TenneT, the Dutch-German TSO, has been cooperating for quite some time with the sonnen GmbH, a company specialising in home energy storage systems. Now a breakthrough has been announced: For the first time, sonnen provides operating reserves throughout Germany with its networked home storage systems.

This means that the currently largest virtual battery, which can compensate for grid fluctuations, goes into operation. This battery works in a unique way: It consists of thousands of individual electricity storage units, which are used for the own energy consumption of their respective households. If there are deviations in the power grid, these batteries automatically arrange themselves into a virtual large battery by means of artificial intelligence. Households are thus capable of performing the same compensation functions as conventional power plants and short-term deviations in the grid can be compensated very quickly. For this reason, sonnen, together with its technology partner tiko Energy Solutions, has been prequalified by TenneT to provide primary control reserve.

The prequalification of the virtual battery system for the primary control power market is subject to the strictest technical and safety requirements. Lex Hartman, Managing Director of TenneT, comments on the innovative technology: “That networked battery storages as virtual power plants are now able to stabilise the grid in the event of frequency deviations, is a further step on the road to increased system integration of renewable energies.”

TenneT has prequalified a virtual battery system consisting of individual storage units for the provision of operating reserve (picture: TenneT)

Linkup
> See TenneT press release, in German (html)
> Watch sonnen demonstration video, in German (YouTube)

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Wind energy to provide operating reserve

11.09.2017

Even in case of outages, disruptions or other unforeseen events, the operating reserve ensures stability of the transmission grid and secures the customer supply. That is why the operating reserve is essential to any transmission system operator (TSO). On the German market, operating reserves have so far been provided primarily by conventional power plants and hydroelectric plants. The inclusion of wind energy to provide operating reserve in the near future is an urgent task for TSOs in order to keep the grid stable in times of an ever increasing share of the renewables.

TSC member Amprion, one of the four German TSOs, now has prequalified the first wind farms within its control area for participation in the operating reserve market. The prequalification proves that the selected wind farms can be controlled quickly and precisely in accordance to the respective operation reserve type. They also fulfill the necessary requirements regarding information and communication technology. Amprion’s approach is an important step towards the integration of the renewables and thus for the energy transition in Germany.

> See Amprion press release, in German (html)

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