Statoil plans battery storage for Hywind

Battery storage has the potential to mitigate the intermittency and to optimise the output of wind farms Battery storage has the potential to mitigate the intermittency and to optimise the output of wind farms

A new battery storage solution for offshore wind energy will be piloted in the world's first floating wind farm. The Hywind project to be located off the coast off Peterhead in Aberdeenshire, Scotland will have a battery storage facility incorporated into its shore station to optimise the electrical power distribution.

Named Batwind, this battery storage system will be developed in co-operation with Scottish universities and suppliers under a new Memorandum of Understanding (MoU) between Statoil, the Scottish Government, the Offshore Renewable Energy Catapult and Scottish Enterprise.

Battery storage has the potential to mitigate the intermittency and to optimise the output of wind farms. This can improve efficiency and lower costs for offshore wind by making the electrical power available when demand is high. This pilot installation in Scotland will provide a technological and commercial foundation for the implementation of Batwind in full-scale offshore wind farms, opening new commercial opportunities in a growing market.

Stephen Bull, Statoil's senior vice president for offshore wind, said, "Statoil has a strong position in offshore wind. By developing innovative battery storage solutions, we can improve the value of wind energy for both Statoil and its customers. With Batwind, we can optimise the energy system from wind park to grid. Battery storage represents a new application in our offshore wind portfolio, contributing to realising our ambition of profitable growth in this area."

Statoil will install a 1MWh lithium battery based storage pilot system in late 2018. This equals the battery capacity of more than 2 million I-Phones. The pilot will be part of Hywind Scotland, an innovative offshore wind park with five floating wind turbines located 25 km offshore Peterhead. The wind park is currently under construction and the start of electricity production is expected in late 2017.

A structured programme is now being established under the MoU to support and fund innovation in the battery storage area between Statoil and Scottish industry and academia. This programme will be managed by ORE Catapult and Scottish Enterprise.

Scotland's Energy Minister, Fergus Ewing commented, "The signing of this MoU will allow the signatories to work together in the development of the Batwind battery storage solution. This will help maximise the renewable generation of the Hywind offshore wind farm, whilst informing the case for energy storage and demonstrating the technology's ability to support renewables in Scotland and internationally."

A recent industry and Government report, produced by the Carbon Trust, concluded that if the energy market was adapted to appropriately recognise the benefits of electricity storage to the wider system, this could lead to savings of up to £50 a year on an average energy bill and a system-wide saving of up to £2.4bn a year by 2030.

By Jake Frith

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