Energy Storage

Queensland network operator Powerlink has indicated battery storage will be a critical part of a bespoke strategy designed to solve system strength issues that have emerged as a challenge for renewable energy generation in the National Electricity Market.

Researchers from Hong Kong have applied a novel charge-reinforced, ion-selective (CRIS) membrane to a polysulfide-iodide redox flow battery they had built in 2016. The redox flow battery showed a capacity decay rate of just 0.005% per day for 1,200 cycles, and a lifetime with over 2,000 hours’ cycling, which the academics said corresponds to approximately three months.

Deakin University has received funding for two multi-million dollar facilities, one devoted to advanced battery research and the second for the development of hydrogen technology. The projects’ aims will be to overcome hydrogen’s hurdles and, for batteries, to improve existing technologies while also investigating sustainable alternatives like sodium batteries.

Underwater gravity energy storage has been proposed as an ideal solution for weekly energy storage, by an international group of scientists. The novel technology is considered an alternative to pumped-hydro storage for coasts and islands without mountains that are located close to deep waters, and may also be interesting for PV if used to store green hydrogen.

France’s Revolt Energy Green has developed a flexible solar+storage solution for one-off events, construction sites, and different kinds of off-grid applications. It has also developed a mobile hydrogen solution.

Smart energy software company Evergen will provide an energy management platform as part of a net-zero energy emission terrace homes pilot at Carseldine Village, north of Brisbane.

New reports and modelling has led TasNetworks to further push its largest of four possible Marinus Link versions. The largest, a 1,500 MW interconnector between Tasmania and the Australian mainland, is being shown to provide benefits across the entire NEM through grid stability and downward pressure on wholesale electricity prices. But there is still some discussion about who should pay for it.

Researchers in China have built a PV-powered air conditioner that can store power through ice thermal storage. The performance of the system was evaluated considering operating efficiency and stability and the scientists found that a device relying on a variable-speed compressor and an MPPT controller showed very good ice-making capability.

Spanish EPC Gransolar Group’s four member companies across the entire value chain are combining on its first hybrid power plant. The 5 MW solar + storage hybrid power plant near Dalby, Queensland, will supply solar energy to grid service provider Ergon while also taking advantage of all the other revenue streams available to energy storage projects.

Spanish renewable energy company Acciona is testing four second-life batteries with a combined capacity of 130 kWh at its 1.2 MW experimental solar park in Tudela, in the Spanish region of Navarra.