DUNEDIN, New Zealand: A proposed multibillion-dollar project to build a pumped hydro storage plant could make New Zealand’s electricity grid 100 per cent renewable, but expensive new infrastructure may not be the best way to achieve this.
Worldwide, pumped hydro energy storage is seen as a promising option to support cheap and secure 100 per cent renewable electricity grids. But the possible closure of the Tiwai Point aluminium smelter would free up around 13 per cent of renewable electricity supply for flexible use. This alone raises the question whether a pumped storage development on this scale is necessary.CHANGING SUPPLY AND DEMAND
A cattle farm is seen in Fernside outside Christchurch, New Zealand March 29, 2019. REUTERS/Jorge Silva New markets are developing where businesses can be paid to temporarily reduce their demand at times when supply is not keeping up. It is only a matter of time before such demand response mechanisms become commonplace for households, too.
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