Merus Power Launches First Grid-Forming Battery Storage System in Nordic Region

Introduction

In a groundbreaking development in the field of energy storage, Merus Power has successfully launched the first grid-forming battery energy storage system (BESS) in the Nordic region, specifically tailored for its Swiss client, Alpiq. This 30 MW / 36 MWh energy storage solution, now operational in Valkeakoski, Finland, adheres to the rigorous requirements set forth by Fingrid, Finland's transmission system operator (TSO).

Significance of Grid-Forming Technology

The grid-forming BESS solutions provided by Merus Power possess the innovative capability to independently support the electrical grid during disturbances and failures. Unlike conventional grid-following solutions, the Merus Power system can autonomously maintain voltage and frequency, thus enhancing grid stability and facilitating smoother integration of renewable energy sources into the electricity ecosystem. Its functionality was verified and approved by Fingrid after extensive modeling and stringent field tests.

Grid-forming technology is crucial since it allows an energy storage system—or any power source—to not only follow an existing grid but to establish and maintain grid voltage and frequency independently. This technical advancement positions energy storage as a pivotal player in enhancing grid stability, particularly in fault situations. Traditional grid-following devices, including wind turbines, require sufficient grid-forming capacity to operate reliably. Thus, these grid-forming energy storage systems are essential for enabling the continued growth of renewable energy production.

Timeline and Development

Historically, this project is significant as Fingrid first published its criteria for grid-forming functionality in energy storage systems back in the summer of 2023. Merus Power adeptly developed this technology and brought it into commercial operation within a brief two-year timeframe, demonstrating reliability and capacity to fortify grid stability.

Kari Tuomala, CEO of Merus Power, expressed pride in being the first in the Nordics to operationalize a grid-forming battery storage system. He stated, “This achievement showcases the high level of Finnish product development expertise and our capacity to respond promptly and reliably to new requirements in line with the green transition. Reliability and cybersecurity are also central values in our operations, given that energy storage systems are part of critical infrastructure.”

Collaboration with Fingrid and Alpiq

The project reflects collaboration not only between Merus Power and Fingrid but also with Alpiq, the Swiss energy company that commissioned this crucial project. Achieving this milestone positions Alpiq as a significant player in providing flexible energy solutions within the European electrical market while supporting the renewable energy sector's growth.

Lukas Gresnigt, head of International and member of Alpiq's executive board, highlighted the collaborative spirit that made it possible, stating, “This first grid-forming energy storage system is an important milestone for us and a great example of how collaboration and innovation can accelerate the green transition.”

Ensuring Security in Critical Infrastructure

Merus Power’s BESS systems are designed to ensure high availability even in global crises. With operations firmly rooted in Europe and all manufacturing conducted in Finland, the emphasis on cybersecurity is paramount. Every component of the power electronics and software for grid connectivity has been developed in-house by Merus Power, enhancing the robustness of the energy storage solution recommended to clients.

Conclusion

Acknowledged as a leading energy storage provider in the Nordic region, Merus Power’s latest project represents not merely a commercial success but a major leap towards a new era of energy storage. It illustrates how battery energy storage systems can bolster grid stability and reliability while fostering a more extensive integration of renewable energy. As the world transitions towards sustainable energy solutions, innovations like those achieved by Merus Power will be essential in reshaping energy landscapes.

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