In the UK (and it’s true across the globe), most grid-scale BESS are connected at the distribution level. But transmission connections offer clear advantages, from efficiency to reliability, even project planning. For example, higher voltages mean losing less energy from Ohmic heating; direct transmission connections offer unparalleled grid reliability and enhanced visibility within National Grid control rooms; there’s less congestion on the transmission network, which means the long waiting times that beset the distribution networks may be avoided.
So, why are there less than a handful of transmission-connected projects to date? Well, it is complicated! Such projects require specialised transformers, switchgear, and protection systems, all operating to enhanced safety standards, pushing up costs. Greater levels of expertise are also needed to design and install them. At higher voltages, the potential impact of harmonic distortion on the grid can also be amplified; this requires both studying and potentially implementing sophisticated control systems to ensure compliance with stringent grid code requirements.
So, winning our second transmission-connected project in the UK (i.e., the Atlantic Green’s 300 MW /624 MWh BESS at Cellerhead) is a proud moment for Envision Energy, kudos to the team.
As with all projects, there were interesting technical challenges here which we have overcome. For example, we changed our standard AC skid (2*PCS, LV/MV Transformer, and RMU) because the specific demands of this 400kV project necessitated a radial design. Essentially there is significant fault amplification associated with RMUs at such high voltages. I read recently an article on noise becoming a “thing” for BESS in the UK, we can definitely confirm that here too and have worked extensively on this topic.
Ultimately, I think our capability to successfully deliver this project lies in vertical integration (and I mean true vertical integration). Being the OEM for cells-to-software affords Envision a unique capability to tackle potential challenges with a broad scope to find the most efficient solutions.
Looking forward to our delivering this projects and our continued growth in the UK.
We are proud to announce our partnership with Atlantic Green and Ameresco to develop one of the UK's largest battery energy storage projects, the Cellarhead BESS.
The 300-megawatt battery system, with a maximum capacity of 624 megawatt-hours, will play a pivotal role in increasing clean energy generation, reducing reliance on fossil fuels, and mitigating greenhouse gas emissions. Ground-breaking in 2024 and grid connection expected in Q2 2026, this project marks a significant step forward in our commitment to sustainable energy solutions.
At Envision Energy, we believe in the power of technology to transform the energy landscape. This project is not just about energy storage—it's about setting new standards for reliability and efficiency in the energy sector. Our cutting-edge technology will ensure the Cellarhead BESS contributes to a more sustainable and resilient energy future for the UK.
We look forward to working alongside our partners, together, we are driving the transition towards a more sustainable world!
Details: https://lnkd.in/gKeEgzfv
Ameresco Entered into a $249M (196.5 million GBP) Contract and Long-Term Service (O&M) Agreement with Atlantic Green for One of the UK’s Largest Battery Energy Storage Projects
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2moThe development of 1 GW of battery energy storage systems is a game-changer for the Midwest