Experts question if renewables will keep the lights on

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The capacity mechanism signed off by energy ministers might have excluded coal and gas but they are likely to still be needed to ensure a stable grid on the pathway to net zero emissions by 2050.

to deliver reliable supply into the grid to avoid blackouts by excluding coal and gas, saying there will be major challenges when the grid hits more than 85 per cent renewables.

Federal Energy Minister Chris Bowen and NSW Energy Minister Matt Kean at Thursday’s ministerial meeting.Grattan Institute’s energy program director Tony Wood said there was no doubt it would be harder for a capacity mechanism to work without coal or gas. AER chairwoman Clare Savage, AEMC chairwoman Anna Collyer and AEMO chief executive Daniel Westerman were unavailable for comment on Friday.But AEMO’s integrated systems plan said gas would play a clear role in the grid up to 2050 with 10 gigawatts of gas-fired power needed for peak loads and firming. There is currently 7 gigawatts of gas-fired peaking plants in the grid.

The bids for the capacity mechanism – or Capacity Investment Scheme – will be underwritten and guaranteed by the federal government. “Under the Capacity Investment Scheme, each state and territory will take its own path, but for the first time between those jurisdictions and the Commonwealth we have a unifying goal,” he said.Mr de Brenni said Queensland already had “dozens” of projects it would submit for the capacity mechanism auctions which start next year.“We think that when it comes to an essential service like power for households and businesses, you can’t risk a just-in-time approach.

 

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