The Australian electricity grid operator confirms that a 100% renewable supply is doable.
Yet another study has come out, this one for Australia, concluding that all-renewable electricity is feasible while maintaining current standards for reliability. The difference here is the authors, the Australian Energy Market Operator (AEMO). These are conservative professional engineers not green activists. They prepared the report (technically still in draft) because their political masters told them to do it, not out of enthusiasm. As John Quiggin points out :
The AEMO is the body that manages the electricity market on a minute-to-minute basis, so it has the expertise to assess this claim, unlike the many amateurs who have tried their hands. And, since it might have to do the job, it has no reason to understate the difficulties of a renewables-based system.
The extra costs are significant but not absurd. Quiggin again:
Second, the estimated cost of $111 to $133 per megawatt-hour represents an increase of $60-80/MwH on current wholesale prices, or 6-8c/Kwh on retail prices. Thatâ€™s much less than the increase weâ€™ve seen thanks to the mishandling of electricity market reform.
The takeaway from this chart is that the response of businesses to clear policy and price signals can be very rapid. In fact, most of the change took place in June, just before the policy took effect.
That’s just the short-run impact. Further reductions are working themselves through investment decisions, for instance the mothballing of coal plants. It doesn’t help coal that Aussies are installing solar roofs as if there might be a tomorrow.
Julia Gillard’s Labour government has has a difficult couple of months over the issue. Gillard had to deal not only with rabid opposition from Tony Abbott’s Opposition but her own U-turn. Politics has now moved on, and it’s Abbott who is stuck with an unpopular position, even seen as obsessive. The policy has had no dramatic effects on the standard of living of voters, since the tax is largely recycled as tax rebates. Reality is winning out over spin.
I wonder if anybody will be watching Oz when the negotiations begin in Washington over the fiscal cliff (assuming Obama wins, touch wood, finger rosary, spin prayer wheel, slay chicken). There are several carbon tax and cap-and-trade proposals floating unloved round the Capitol. Perhaps some smart operator like Henry Waxman can get one of them on to the table in January.
Though it would be better if Candidate Obama had a climate change policy to go with the clean energy tie.