The battery storage system that could close down coal power  

Posted by Big Gav in , ,

ReNew Economy has an article on a German energy storage technology company - The battery storage system that could close down coal power.

You don’t have to go far inside the headquarters of German battery storage company Younicos, or even their website for that matter, to find out what they are about. “Let the fossils rest in peace,” the logo suggests. Another sign at their technology centre east of Berlin proclaims: “You are now leaving the CO2 producing sector of the world.”

This sign is designed to mimic those which adorned the checkpoints that separated the various sectors of east and west Berlin before the wall was torn down. Younicos believe they have a technology that is equally disruptive, and can break down one of the last barriers to 100 per cent renewable energy: the need to run fossil fuel generation to control the “frequency” of the grid, and the other system services such as voltage control.

The company, based in Berlin Adlershof, on the eastern outskirts of the capital, is developing 10MW-sized battery parks, using battery systems that it says can stabilise the grid faster, cheaper and with greater precision that conventional generation.

It says that these systems can substitute 10 times the capacity from conventional generation – coal, nuclear and gas – and at a fraction of the cost. According to Younicos spokesman Philip Hiersemenzel, each battery park can be installed at around € 15 million, which means that for an investment of €3 billion, conventional generation in Germany’s 80GW would no longer be needed – at least for frequency and stability purposes.

This is critical is Germany. The sheer scale of their solar PV installations – it has more than 35GW – means that on some days it already produces more than half the country’s electricity needs. But baseload generators have to keep running for the sake of frequency control and system stability, this has caused spot prices to plunge well below zero.

For an 80GW grid, it needs about 20GW and 25GW of “must run” balancing to maintain frequency and keep the grid stable. Younicos says 2GW of its battery parks would render this need redundant. Around 200 of it battery parks could be installed around the country at a total cost of around €3 billion.

(Of course, that is not the only impediment to 100 per cent renewables – enough solar and wind power needs to be built, and other storage is needed, battery storage to respond to variations in load on a minute by minute and hour by hour basis, and longer-term or “seasonal” storage, which can take excess production and store it – synthetic diesel, hydrogen etc.).

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