Siemens Gamesa Renewable Energy is trialing a redox flow battery at SGRE’s La Plana R&D site near Zaragoza, The 2MW La Plana site near Zaragoza. Source: Siemens GamesaThe 2MW La Plana site near Zaragoza. Source: Siemens GamesaSpain. The 120 kW/400 kWh redox flow battery is connected to the hybrid controller of the combined wind, solar photovoltaic and diesel generation system installed at the facility. It also supplements the lithium-ion batteries that have been operational for about two years.

The next-generation vanadium redox energy storage system offers a storage capacity of 400 kWh. A flexible hybrid controller was designed to coordinate the generation of all energy sources to meet the electrical load in order to reduce the levelized cost of energy whether the grid is connected or disconnected. To reduce energy costs, the controller is targeting to achieve the maximum integration of renewable energy.

To support the highly efficient dispatch strategy steered by intelligent control algorithms, a large storage capacity helps to keep generators to their technical minimum load and to enhance the share of renewables — even under low wind periods or cloudy sky conditions.

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