Energy storage |
Spain goes with the flow
H2, Inc of Korea is deploying a 1.1 MW/8.8 MWh vanadium flow battery (VFB) in Spain, the largest in that country to date. The project, sponsored by the Spanish government’s energy research institute, CIUDEN, is scheduled to be completed in 16 months, with installation targeted for the second half of 2025.
The bid for a ‘long duration’ system, capable of providing maximum power for 8 hours, was won in collaboration with Spanish companies.
The battery to be deployed will be H2’s newly developed modular flow battery, EnerFLOW 640. H2 describes VFB technology as being superior to lithium-ion batteries in terms of fire safety and life expectancy, with “almost no degradation over 25 years.” VFB is also “very environmentally friendly because the vanadium electrolytes can be either recycled or reused after the project period is over.”
According to H2, the EnerFLOW 640 has “the smallest footprint ever achieved with a VFB,” thanks to use of “its latest high- performance stacks, unique three-block design and HyperBOOST technology.” The growing demand for large-scale LDES (long-duration energy storage) across the world highlights the role VFB can play, says H2, which is a specialist in flow batteries. It employs “proprietary technology developed in-house” and has a production capacity in South Korea exceeding 330 MWh. Through the Spanish project, H2 believes it has established a “cornerstone” for entering the European LDES sector, with “Spain serving as a gateway to the growing market.”
H2 also has a 20 MWh project in California.
The company say it is planning to build a second VFB factory in South Korea soon, “to secure gigawatt-hour scale production.”
Fast work by RWE
RWE has begun construction of a 7.5 MW/11 MWh “ultra-fast battery storage system” at its Moerdijk power plant site in the Netherlands. With its ability to export or absorb electricity within milliseconds, the system will help to safeguard the electricity grid, says RWE, providing the equivalent of inertia.
The Moerdijk battery storage project is part of the system integration measures for OranjeWind, the RWE/TotalEnergies Dutch offshore wind project. OranjeWind is aiming to establish new ways of integrating intermittent renewable power generation into the Dutch energy system by employing electrolysers, smart charging stations for EVs, e-boilers, and battery storage systems. “With the Moerdijk battery storage system, we are pioneering grid-forming technologies as alternatives to traditional solutions such as power stations”, said Marinus Tabak, COO of RWE Generation and RWE Country Chair for the Netherlands.
For Moerdijk, RWE is installing lithium iron phosphate (LFP) batteries in three shipping
containers. The storage system will be connected to the high voltage grid via the existing grid connection. Highly reactive control technology and inverters with grid-forming functionality will enable the battery storage system to provide instantaneous reserve power, with grid-forming referring to the ability of battery based systems to take over important functions traditionally performed by conventional power plants to ensure a stable and reliable electricity grid.
After commissioning at the end of 2024, the plant will undergo a two-year pilot phase. During this phase, the transmission system operator TenneT will be a partner of the project to further develop its technical requirements and grid compliance procedures for the grid-forming features of the battery storage system. The Moerdijk battery is the second battery storage facility to be built by RWE in the Netherlands: the company started construction of a 35 MW/41 MWh battery storage facility in Eemshaven at the beginning of 2024.
Location of battery energy storage system at Moerdijk (source RWE)
Wärtsilä to deliver Eraring stage 2
Wärtsilä has been selected by Origin Energy to deliver the second stage of the Eraring battery facility at Origin’s Eraring power station in New South Wales, Australia, with completion expected in 2027. Stage 2 will add 240 MW/1030 MWh, bringing total capacity to 700 MW/2103 MWh. Wärtsilä is currently in the process of delivering the first stage (460 MW/1073 MWh), which is expected to be in commercial operation by the end of 2025.
EnerFLOW 640 vanadium flow battery (source H2, Inc)
The stage two battery energy storage system will operate in VIrtual Synchronous Machine (VISMA) mode, enabling short circuit current
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capabilities such as reactive current, droop control, and synthetic inertia, to support grid stability and security. The provision of these capabilities, “system strength support services”, will be facilitated by use Wärtsilä’s intelligent energy management system, the GEMS Digital Energy Platform.
Stage two will employ Wärtsilä’s Quantum High Energy (QuantumHE), described as a next- generation energy storage system with advanced safety features, enhanced energy density, lower equipment costs and reduced maintenance needs.
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