Thermal, wind and demand forecasting failed in South Australian Heatwave: AEMO

AEMO have released their preliminary report into the loadshedding and blackout of 90,000 south Australian residents and businesses during the extreme heatwave on 8 February.

In their summary of the event AEMO outline three main causes for the failure to match generation to demand. They specify that supply was rapidly changing in the period prior to the peak at 18:00, but the problem came down to:

• Demand was higher than forecast
• Wind generation was lower than forecast, and
• Thermal generation capacity was reduced due to forced outages

When you analyse the report it becomes clear there was available capacity (Pelican Point 2) that could have been brought on line to meet the demand, but the market based processes of AEMO failed.

It is important to emphasise here that Adelaide and most of South Australia on Wednesday 8 February was experiencing extreme temperatures in the middle of an exceptional heatwave. Climate scientists have been predicting that heatwaves would get more intense. This sort of extreme heat event is in line with their predictions.

Adding to the extent of the issue, AEMO ordered at the evening peak at 18:03 100MW of load shedding to balance supply versus demand, but it appears SA Power Network shed 300MW, much more than was required.

I reported initially on this event the day after, on February 9: AEMO orders South Australian #heatwave blackout while Gas turbine remains idle.

Solar thermal for South Australia? Solar Reserve says 6 power stations may be built

Originally published at nofibs.com.au

Solar Reserve has a plan to build a solar thermal power station with 8 hours molten salt storage at Port Augusta which would diversify South Australian electricity generation, bringing jobs and solar innovation to the state.

A report in the Adelaide Advertisor says that once the first power station is built with locked in long term contracts and finances, a further 5 solar thermal power stations of a similar size could be built across the north of the state. Leigh Creek, Woomera, Whyalla, and Roxby Downs have all been identified as possible sites. This would then amount to about 650MW capacity, as much as the expanded interconnector with Victoria.

Port Augusta: Transition from #coal to #solar critical say locals

First published at nofibs.com.au

The Port Augusta community have called for South Australian Premier Jay Weatherill to step up to help fund construction of a solar thermal power station. The call from Repower Port Augusta comes in reponse to an Alinta Energy assessment (Draft Milestone 3 Balance of Study Report March 2015 PDF) that found a solar thermal power station was still uneconomic to build without government support. The proposed 50MW project is estimated to cost $577 million, about $150 million greater than it's commercial viability.

Australia currently does not have any 'baseload' concentrating solar thermal with molten salt energy storage power plants. The Port Augusta proposed power station could be Australia's first using a Concentrating Solar Thermal (CST) power tower with up to 15 hours molten salt energy storage included.

These type of CST plus molten salt energy storage power plants are already producing electricity or under construction at Crescent Dunes in Nevada, USA (110MW), Gemasolar in Andalucía, Spain (20MW), Planta Solar Cerro Dominador at Calama, Chile (110MW under contruction), Rice Solar energy project in California, USA (150MW), and Supcon Solar Project in China (50MW under construction).