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The Basslink cable has gone down again, and is expected to be out of action til mid-October. Luckily for Tasmania, the dams are at 45% full. However in Victoria, which sits on one of the largest brown coal reserves in the world, currently prices are hitting $300/MWh every morning and every evening at peak time. This graph below shows 5 minute prices for the last two days in Victoria. Every dollar Victoria saves at lunchtime from solar generation is lost a few hours later, and then some. Though it’s wrong to use the word “saves” at any time of day. The wholesale price of brown coal power for years was $30/MWh, and this below is a wholesale price graph. Even the lunchtime “low prices” are twice as expensive as brown coal which can supply all day, every day and for hundreds of years to come and doesn’t cause voltage surges, frequency instability, or house fires, and doesn’t need backup batteries, demand management schemes, free movie tickets, or dark hospitals.
The AEMO must be counting their lucky stars that this happened at probably the “best” time of year when demand is lower.
….
The effect of the Basslink outage […]
For the last year everyone has been calling Tasmania the “Battery of the Nation” — Turnbull, Hydro Tasmania, government departments, the ever hopeful green press. It’s an official plan. The bright idea is to add “Pumped Hydro Storage” to the large dams already on the island state, boosting the only reliable renewable type of energy. But right now, as far as mainland Australia goes, Tassie is a No-Volt Battery.
Even Hydro Tasmania is calling itself the “Battery of the Nation”
The dirty secret is just how fragile the link is. Not only did it break for six spectacular months in 2016 — leaving the “green” state flying in squads of diesels — but its now quietly out of action again and it’s projected to be out for two months all up. The 290 km undersea cable known as Basslink is the second longest of its type in the world. It broke on 24 March 2018. It is not expected back in action til May 31. It was an accident of routine maintenance at one end.
“The equipment was damaged by a third-party contractor during routine works. There is no damage to the cable itself.”
[…]
By Jo Nova
The real cost of back up
Imagine building and maintaining a perfectly good gas plant and then having it sit around for five whole years “just in case”?
There’s been a wind drought in the last three months in Australia, which meant hydro power had been used more than expected to fill the gap. But wouldn’t you know it, it’s been dry spell for most of the last year in Tasmania too and the dams were getting low. So on June 6th, the Combined Cycle Gas plant at Tamar Valley was set up to run for the first time since 2019.
Back in 2016 the maintenance costs of the keeping the CCGT at Tamar Valley on “30 day” standby was $12 to $24 million a year, depending on who you asked. So the five year cost of gas backup is in the order of $100 million, but those costs will be slapped on the gas plant bill, when really they’re a weather dependent renewables cost. What we need is reliable energy, not random electricity. If energy companies were only paid for reliable dispatchable power, the wind and solar plants would have to build their own “back up […]
They’re not much use without a lot of cabling. | Image by Norbert Pietsch from Pixabay
By Jo Nova
Thanks to Oldbrew at Tallblokes Talkshop
Who knew high voltage cables running for kilometers in a deep electrolytic moving body of water would be expensive?
The 245kV Wolfe Island Cable | Photo by Z22
Despite offshore windfarms dealing in a kind of mechanical hell of high speed salt water spray, big waves and volatile wind conditions, surprisingly 85% of the insurance claims are because the underwater cables are failing.* If the subsea cables can’t be insured, it’s another unexpected cost threatening the economics of offshore wind.
The underwater cables needed for offshore wind are apparently so costly to repair, and the losses from lack of generation so steep, they are in danger of becoming uninsurable.
Subsea cable failures pose global threat to offshore wind
Energy News Live
The race to harness offshore wind energy has hit a significant roadblock, with the reliability of subsea cables emerging as a critical concern.
Global Underwater Hub (GUH) has raised alarm bells about the escalating issue of subsea cable failures.
October 6th, 2023 | Tags: Basslink, Subsea Cables, Wind Power | Category: Global Warming, Grids, Renewable, Wind Power |  Print This Post | |
The Tasmanian Government has just announced they will be “200% renewable” by 2040 — a feat only possible because they have an umbilical cord to hostages in the mainland who have to pay for irrelevant surges in electricity that arrive when they don’t need it. The same hostages will send back fossil powered electricity every week to keep Tasmania running when the wind and sun stop and the water is worth more in the dam than out of it. Not to mention container-ships of GST cash to support the state with the second highest unemployment in the nation.
This is the same state that went 100% renewable for three months in 2015 and launched itself into an electricity crisis. They decommissioned the last fossil fuel power station, just in time to get islanded by a break in their umbilical cable and thence had to order flying squads of diesel generators to keep the lights on at a cost of at least $140m. They also had to restart the same plant they just closed. The state lost half a billion dollars in the crisis — nearly twice the cost of the newish gas plant which had only built in 2009.
[…]
How to make electricity more expensive: build 1,000MW of random generation which needs expensive back up and an undersea cable too.
Tom Quirk and Paul Miskelly noticed that the team selling the new “largest wind farm in the Southern Hemisphere” on Robbins Island are claiming it will help stabilize the supply of intermittent power in Australia. Instead it’s likely to do the opposite. This is the same 1GW wind farm that even Bob Brown, former Greens leader, doesn’t want. An eagle-chopping eyesore.
UPC Renewables are claiming the correlation between the Tasmanian Robbins Island output is “very low” compared to the wind farms in Victoria. It would be nice if only it were true. Instead they apparently got their r mixed up with their r2 — and incorrectly claim the correlation is low when actually its dangerously high. I say “dangerous” because it’s a danger to the NEM — the national grid. The last thing we need is 1,000MW of useless extra energy that arrives when all the other useless energy arrives — exacerbating the ups and downs — driving the efficient baseload providers out of business even faster, and leaving the nation with an expensive headache and sitting on a […]
When cheap solar is expensive Badly installed solar PV makes Australia’s grid fragile
On August 25 last year there was nearly a system blackout when, improbably, three states of Australia were islanded by one lightning strike. Within seconds, trips were switching, two smelters were load shed to save the grid from collapse, and across the Eastern Seaboard of Australia frequency and voltages surged or fell everywhere. In Sydney 45,000 homes lost power for a couple of hours. Shops had to close. Trains were stopped. Passengers were stranded. Traffic signals were not working on major roads. There was chaos. Industrial users shut down in a mass of 725MW of load shedding.
The AEMO final report on that day has just come out and shows us just how fragile our grid is. This was not so much a freak accident, as an accident waiting to happen.
It turns out that another cost of cheap rushed solar panels is that many drop out with voltage spikes, suddenly going offline and leaving another hole to fill. The numbers are amazing — of panels installed in the last 2 years as many as one-third in South Australia dropped out when we needed them and […]
End the taboo: The obvious solution to our expensive unreliable electricity is to fix old coal plants
The proposed NEG (National Energy Guarantee) will cut a pathetic sliver off our obscene bills. Malcolm Turnbull thinks Australians will be grateful for $100 off. We pay $3,700 a year for an average 4 bed house (and it’s heated with gas)? Are they kidding?
No one is even discussing the most obvious, cheap way to cut our electricity bills. Fix the old coal plants. As Ian Waters, engineer, says “Enlightened, motivated people can do it!” Just getting Liddell back up to full power would deliver another 800MW of cheap, despatchable, and reliable power. Wouldn’t that be “handy”?
All the talk of new coal ignores the cheapest source of electricity around the nation. Our star infrastructure, gift of the older generation to the younger, are our old coal power stations, paid off over decades and still powering the nation.
Ian Waters, describes below how the NEG serves the big retailers not the consumers, and it’s in their interest to run old coal plants into the dust. (Our electricity market is so screwed thanks to the […]
The fear is palpable
How much fun can you have living in a global experiment? In Australia, peak summer is about to hit in a post-Hazelwood-electricity-grid. There’s a suite of committee reports as summer ramps up. Everyday there’s another Grid story in the press, and a major effort going on to avoid a meltdown. Minister Josh Frydenberg announced today that “we’ve done everything possible to prevent mass blackouts”. Or as he calls it, a repeat of the South Australian Horror Show. Politicians are so afraid of another SA-style-system-black that they are throwing money: The “Snowy Hydro Battery” will be another $2 billion. Whatever. It’s other people’s money.
This is what they are afraid of:
The red bars mean “Reserve Shortfall”. The dark blue matter is “Generation”. The graph covers two years (sorry about the quality) so the two red bursts are summer 2018 and summer 2019.
SA Medium Term Forecast, Outlook, AEMO, Nov 16th 2017, South Australia.
Oddly we are headed for a critical time, but this’s the most recent graph I can find — thanks to Wattclarity — from November 16th, 2017. (Here’s an earlier version from March 2017. and from Dec 2016). Perhaps there is a newer […]
I’d like to thank South Australia for so selflessly showing the world how well renewables work. (And thank we West Australians for paying for it).
To get ready for the shortfalls next summer, the SA government is said to be ordering in 220MW of diesel generation at an expected cost of $114m.
The government has contracted privately owned South Australian electricity distribution company SA Power Networks to obtain and install 200 megawatts of back-up generation across the state before summer. But despite promising a “detailed costing” would be provided in last week’s state budget, Treasurer Tom Koutsantonis did not offer any such details.
The opposition said the budget had allocated $114m for operational costs in 2017-18 from the $550m energy plan, “indicating the diesel generators are going to be very expensive”.
This $106m sacrifice is expected to reduce global temperature by 0.000C, but will save the premier from being called a climate denier at dinner parties:
“Eighteen months ago the Tasmanian government spent $64m in leasing, site establishment and operational costs for 220MW of diesel generation for three months when a combination of drought and repairs to the Basslink left it short of electricity,” […]
Greedy Green Hubris gone wrong? It took months of bad choices to achieve this Gold-Star Moment in Bad Management:
Tasmania’s state-owned Hydro-electric power generator could face legal action for damages after admitting it cloud-seeded in or near water catchments the day before disastrous flooding, although heavy rain was forecast.
Tasmania shut their only fossil fuel power plant in August last year, and relied on renewable energy and one sole Basslink electricity cable to mainland Australia. The cable was supposed to be a back up supply but was bringing in 40% of Tasmania’s electricity, and it broke in December. But a green and greedy approach in Tasmania meant that the state had already run its dams down to 26% levels by selling too much electricity to the mainland at high “renewable” subsidized prices. That was a low level at the start of summer, normally a drier season in Tasmania. After the Basslink cable broke, the dam levels fell to a precipitous 13%, so fast that the green state had to bring in diesel generators just to keep the lights on. They also switched back on the Tamar Gas plant in late January. So much for being the “100% […]
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