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E.ON examines options for storing wind power in the German gas grid
Power2Gas: innovative contribution to energy turnaround
11.11.2011 + + + E.ON is developing a pilot plant in Falkenhagen in the north east of Germany to convert power from wind energy into hydrogen which can then be stored in the country’s gas grid. The company is investing over EUR5 million on the pilot plant and further research into this innovative technology.
Using power from renewable energy sources, the plant will produce about 360 m³ of hydrogen per hour from 2013 onwards through electrolysis. The hydrogen will be fed into the Ontras gas pipeline system and be used like normal natural gas. This makes the gas grid a storage system for power from weather-dependent renewables.
E.ON is committed to intensively testing the technology which huge potential. At present, up to 5 percent hydrogen can be added to the natural gas grid without any problems, and in the medium term experts expect up to 15 percent. This means that today’s entire renewable power output could be stored in the German gas grid. Demand for capacity on this scale will however only arise over the next decades, when most of generated power is coming from renewable energies.
"We need new storage capacities so that we can further increase the share of weather-dependent wind power in our generation portfolio in coming years. Using the existing gas infrastructure to store hydrogen is a promising approach in the long run, enabling us to combine our strengths as a power and gas company," said Professor Klaus-Dieter Maubach, member of the E.ON AG Board of Management responsible for Technology & Development.
If Germany increases the share of fluctuating wind and solar energy in power generation in the years ahead, the power available will at times exceed demand and bring the power grid to the limits of its capacity. E.ON is therefore investing in technology to store this excess power. At the moment, the focus is on enlarging the capacity of pumped-storage power stations. For instance, EON intends to extend the pumped-storage power station at Edersee in the federal state of Hesse and - together with its partners - build a new plant on the German-Austrian border.
Source: E.ON
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