- Joined
- 3 July 2009
- Posts
- 28,963
- Reactions
- 26,822
Santos will soon close its Devil Creek gas plant, which last year supplied 11 per cent of the WA market, as concerns grow about the volume and reliability of the state’s gas supply.
Alcoa has been forced to reduce production at its Kwinana alumina refinery in Western Australia and Wesfarmers has resorted to emergency gas in storage
The Alcoa Kwinana plant has been holding on by its fingernails for years, it wouldnt take much of an excuse to close it, I would guess.Santos to close gas plant in WA amidst supply concerns
WA will have one less gas supplier from May when the Devil Creek plant in the Pilbara closes.www.smh.com.au
And the overall gas situation in WA seems to be having some impacts:
Alcoa cuts WA alumina production as gas crisis bites
Alcoa has taken one unit offline at its Kwinana alumina refinery and Wesfarmers is relying on emergency gas in storage as Western Australia’s energy crisis worsens.www.afr.com
That's a really old photo though.
The article suggest that the problem is due to the AEMO and its costing allocation models.Australian solar farms are having half of their output curtailed by grid congestion in some instances, with renewables bearing the brunt of over-capacity – even though their output is cheaper and cleaner than coal and gas generation.
A study by a team of researchers at the Australian National University involved in its Battery Storage and Grid Integration Program shows that solar and wind are bearing the brunt of congestion management in Australia’s main grid, with some facilities hit particularly hard.
Nearly one dozen wind and solar farms are being impacted on more than 100 days a year, while two solar farms – Molong and Manildra in western NSW – suffered losses of output of 53 per cent and 48 per cent respectively in calendar 2022.
Both solar farms are located on a part of the network known in the industry as the “line of losses”, which is emerging as an even more challenging part of the grid than the so-called “rhombus of regret” in Victoria that is the second biggest source of frustration and revenue losses. (See map below).
The ANU findings are contained in a submission to the Energy Security Board’s controversial Transmission Access Reform, which has led several peak bodies to warn that proposed reforms could bring new developments to a halt. The Smart Energy Council has branded the proposals as a “solar stopper”.
The ANU report highlights problems in the way the grid is managed, including in the way that AEMO applies so called “negative mic-pricing adjustments” to relieve congestion.
The report also cites the failure to give enough incentives for battery storage to help solve the problem. In some instances, when batteries discharge, the situation is actually made worse.
Some heavy technical stuff, but worth getting yoyr head around it to see that simplistic energy generation statements should be treated with at a level of cautionIt’s worth, for a start, reminding readers of how Marcelle wrote ‘Not as simple as it appears – estimating curtailment of renewable generation’ back in June 2020. Something well worth remembering:
1) when doing this sort of analysis yourself; and/or
2) when reading of analysis by others.
As Marcelle noted in that article, there’s a couple different reasons why a Wind Farm or a Solar Farm might be curtailed, with three big reasons being…
Curtailment Cause #1 = Network constraints
Marcelle wrote that these might include:
‘such as a transmission line out of service, thermal or stability constraints on the network, or system strength limitations applying to specific units or types of generators’
This is the one that (my reading of Giles’s article suggests) is the focus of the ANU analysis.
However it’s important to keep in mind that there are other causes of curtailment as well, such as …
Curtailment Cause #2 = Economic curtailment
Marcelle wrote that these might be…
‘including the spot price being negative due to oversupply, or the cost of generation too high (e.g. In Feb 2020, due to extreme FCAS contingency costs that are paid by generators pro-rata on generation)’
Marcelle mentioned February 2020, but relevant to curtailment in 2022 could have been (for generators in South Australia) the high Contingency Raise FCAS costs in
Curtailment Cause #3 = Commissioning
Marcelle wrote:
‘new generators must progress through “hold points”, limiting their output until AEMO is satisfied they’re ready to generate more.’
As we work through the following, best to keep all three of these potential factors in mind.
Other causes of curtailment
In doing simple analysis for units operating in the ENERGY market, it may be that there are other reasons why they don’t achieve targets that their bid stack might simplistically suggest (e.g. lower targets in ENERGY might be due to ramp rates, or FCAS trapeziums, and so on).
Renewables are marching on.
Record levels of renewable energy push demand for electricity from the grid to all-time low for December quarter
Increased output from renewables, with a near-zero fuel cost, also nudged more coal and gas out of the generation market
View attachment 152114
- Follow our Australia news live blog for the latest updates
- Get our morning and afternoon news emails, free app or daily news podcast
Even with relatively calm days producing the lowest recent quarterly utilisation rate, total windfarm output exceeded any previous December quarter. Photograph: Russell Freeman/AAP
Peter Hannam
Wed 25 Jan 2023 01.00 AEDTLast modified on Wed 25 Jan 2023 07.23 AEDT
Milder temperatures and record levels of renewable energy drove electricity demand to its lowest levels for any December quarter, according to the Australian Energy Market Operator.
Wholesale power prices also retreated during the period, particularly after the Albanese government imposed price caps on black coal and gas that are used to generate power, AEMO said in its quarterly report released on Wednesday.
“Electricity futures prices saw steep falls in the mainland states through to the end of the quarter” after the price limits were imposed on 9 December, said Violette Mouchaileh, an AEMO executive.
The average price of $93/megawatt-hour across the national electricity market (NEM) that serves eastern Australia was less than half the $216/MWh cost in the September quarter. Still, it was almost 80% higher than for the final three months of 2021.
Record levels of renewable energy push demand for electricity from the grid to all-time low for December quarter
Increased output from renewables, with a near-zero fuel cost, also nudged more coal and gas out of the generation marketwww.theguardian.com
Amazing look how much more renrwables we have put in since June, what a difference 6 months can make, going from we arent doing anything to record levels. LMAO.Renewables are marching on.
Record levels of renewable energy push demand for electricity from the grid to all-time low for December quarter
Increased output from renewables, with a near-zero fuel cost, also nudged more coal and gas out of the generation market
View attachment 152114
- Follow our Australia news live blog for the latest updates
- Get our morning and afternoon news emails, free app or daily news podcast
Even with relatively calm days producing the lowest recent quarterly utilisation rate, total windfarm output exceeded any previous December quarter. Photograph: Russell Freeman/AAP
Peter Hannam
Wed 25 Jan 2023 01.00 AEDTLast modified on Wed 25 Jan 2023 07.23 AEDT
Milder temperatures and record levels of renewable energy drove electricity demand to its lowest levels for any December quarter, according to the Australian Energy Market Operator.
Wholesale power prices also retreated during the period, particularly after the Albanese government imposed price caps on black coal and gas that are used to generate power, AEMO said in its quarterly report released on Wednesday.
“Electricity futures prices saw steep falls in the mainland states through to the end of the quarter” after the price limits were imposed on 9 December, said Violette Mouchaileh, an AEMO executive.
The average price of $93/megawatt-hour across the national electricity market (NEM) that serves eastern Australia was less than half the $216/MWh cost in the September quarter. Still, it was almost 80% higher than for the final three months of 2021.
Record levels of renewable energy push demand for electricity from the grid to all-time low for December quarter
Increased output from renewables, with a near-zero fuel cost, also nudged more coal and gas out of the generation marketwww.theguardian.com
Amazing look how much more renrwables we have put in since June, what a difference 6 months can make, going from we arent doing anything to record levels. LMAO.
I've lived long enough and seen enough, to qualify.Cynic.
For the record, annual second half (July - December) generation by source for calendar years as follows.Amazing look how much more renrwables we have put in since June, what a difference 6 months can make, going from we arent doing anything to record levels. LMAO.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?