Energy storage in the arctic

2017-02-10 - Power Engineering International article by Jim McDowall - January 26, 2017
As a battery technology, lithium ion (Li-ion) has several advantages for KEA. Firstly, because it can react quickly to changing supply and demand, Li-ion is particularly well suited to riding out variations in wind output from seconds to hours, matching the intermittent breaks and gusts in wind power. Li-ion performs predictably over a large number of charge and discharge cycles. This translates into a calendar life of 10 years or more.

In addition, its high energy density combined with the low weight of lithium means that Li-ion batteries are relatively small and lightweight, providing close to 1 MWh of energy in a single six-metre container and with a power capability of up to 2 MW. Intensium Max containers can also be shipped fully assembled and factory tested, thus minimizing the work that has to be performed on-site.

Installation is also straightforward. Saft delivered the Kotzebue battery as a fully integrated system with battery modules, battery management systems, temperature control and safety systems. The ESS includes a 1.2 MW power conversion system (PCS) and grid connect transformer supplied by ABB, housed inside a generator building.

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