Siemens Gamesa, the company formed in April 2017 when Siemens Wind Power and Gamesa merged its wind power businesses, announced on May 23 it had begun testing a 120kW/400kWh redox flow energy storage system at its La Plana R&D site near Zaragoza, Spain.
The test-site integrates the vanadium redox system with a wind turbine, solar-PV modules and a diesel generator and will supplement the 429kW/143kWh lithium ion system that was installed in 2016.
The company would not name the supplier of either the lithium ion or redox flow battery, but a spokesperson said “the redox flow battery is still in an early stage of its development. But it offers great potential for stationary use where the low energy density, the weight and the demand for space play a minor role.
“Since lithium sources are expected to run out over the next 20-30 years this will lead to higher costs of lithium ion batteries, and this will also be the second chance for redox flow technology. We see it as a product of the future.
The system is connected to the digital hybrid controller that coordinates the generation of energy sources to achieve the maximum integration of renewable energy.
By using intelligent control algorithms to control the plant’s power supply and demand it is hoped to reduce its localized cost of energy whether its connected or disconnected to the grid.