So you’ve heard of pumped-hydro storage? It’s the closed-loop energy-storage system that uses excess energy in the grid to pump water from a lower reservoir to an uphill reservoir, and then releases that water to flow back down through electricity-generating turbines as needed. Utilising suitable sites around Australia, it has the potential to act as a number of giant batteries that can store energy for release when other renewable sources such as sun and wind temporarily cease generating. Pumped-hydro storage technology has rapidly evolved to efficiently deliver a stabilising source of power in the modern grid. But could it support a future economy exclusively powered by intermittent sources? Dr Roger Dargaville, Senior Lecturer in Renewable Energy at Monash University explains the promise and challenges of using pumped-hydro storage to support a fully renewable Australian electricity supply.
Renew Economy 12th Sept 2018 read more »