Yasmin Ali, Microgrid Knowledge
Summary
Denmark has an ambitious target to produce 100 percent of its electricity from renewable sources by 2050. But integrating renewable energy into the system makes it difficult to balance the intermittent supply with demand.
With its high abundance of renewable energy, Bornholm Island, just south of Sweden, was the perfect test site for the European Union’s EcoGrid EU project. This set out to demonstrate the use of demand response to integrate renewable energy into the grid system.
The Bornholm microgrid
Home to 40,000 inhabitants, the island is connected to the Swedish electricity grid via a 60 kV AC cable, but can also operate in island mode — independent of the grid — if required.
The environmentally conscious community of this island started to think about renewable energy, and how to preserve their beautiful natural habitat, back in the early 1980s. Since then, they have been ahead of the curve on energy technology, creating a living microgrid demonstration lab.
The island currently has 16 MW of combined heat and power, 29 MW of wind, 6.5 MW of solar photovoltaics (PV), 2 MW of biogas as well as 34 MW of diesel and 25 MW of oil-fired steam generation for backup.
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