Fairfax - Peter Hannam
When it comes to hype, there is probably nobody as outlandish as US-based billionaire Elon Musk and his Tesla corporation.
Who else would plan to blast one of his new electric vehicles into space aboard his company's SpaceX rocket bound for Mars?
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| Power play: Tesla's battery may represent a new dawn for the industry. Photo: Joe Armao |
"Payload will be my midnight cherry Tesla Roadster playing
Space Oddity,"
Musk tweeted last month. "Destination is Mars orbit. Will be in deep
space for a billion years or so if it doesn't blow up on ascent."
A
mini version of the hyperbole has been on show in Australia, following
the installation late last year of a 100-megawatt lithium ion battery –
the world's largest. Musk famously offered to supply it for free if his
firm couldn't build it within 100 days.
It arrived in time for this summer's strains on the electricity
system, and may come in handy as the mercury soars this weekend over a
region of Australia in arc from Adelaide to Tasmania and up to Brisbane
and beyond.
The
big battery, located next to the Hornsdale wind farm in the mid-north
region of South Australia, has already been active, drawing interest
from well beyond these shores.
The
Los Angeles Times and
Washington Post were among international publications to cover the battery's early success in shoring up Australia's electricity grid.
Interest was sparked in part by the battery's quickfire response – just
0.14 seconds – to inject electricity into the network following the
failure of a 559-MW unit of Loy Yang A in Victoria's Latrobe Valley.
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| A Tesla car charging station at the wind and solar battery plant outside Jamestown in South Australia. Photo: AAP |
"It appears to be far exceeding expectations," the
LA Times
trumpeted. "In the last three weeks alone, the Hornsdale Power Reserve
[as the battery is known] has smoothed out at least two major energy
outages, responding even more quickly than the coal-fired back-ups that
were supposed to provide emergency power."
'Lumbering coal'
The concept of the battery beating out coal-fired power was a key part of the story, prompted by an article on the
RenewEconomy website, headlined: "Tesla big battery outsmarts lumbering coal units after Loy Yang trips".
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| All smiles now: SA Premier Jay Weatherill tours the new Tesla battery site at the start of December. Photo: AAP |
"By the time that the contracted Gladstone coal unit had gotten out of bed and put its socks on so it can inject more into the grid – it is paid to respond in six seconds – the fall in frequency had already been arrested and was being reversed," the report said.
As impressive as it seemed, the reality, though, was probably more prosaic.
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| Hazelwood Power Station in Victoria closed in March 2017, with more coal-fired plant closures to come. Photo: Pat Scala |
Analysis by Dylan McConnell, a researcher at Melbourne
University's Climate & Energy College, found each of Gladstone's six
units increased output and had supplied 75MW of the shortfall before
the battery "had done anything".
It also appears that at least
for the Loy Yang unit tripping on December 14, the battery was not
"enabled" in the back-up market for Frequency Control Ancillary Services
(FCAS). In other words, probably weren't paid for that intervention.
'Outstanding'
While the hype rings a bit hollow in that instance, there's no doubt
the battery has been making a difference, responding to four coal
generator trips in December alone.
Franck Woitiez, managing
director at Neoen – the French operator of the battery – told Fairfax
Media its performance had been "outstanding". (Tesla, as is its
wont, declined to comment.)
"We are very proud of the battery
performance throughout December and the start of January," Mr Woitiez
said, adding the company had received "quite a few inquiries" about its
operations.
Critics have quibbled at the battery's size,
highlighting that alone it could only supply perhaps 30,000 homes for an
hour or so, at a cost guessed at $US50 million ($64 million).
But
such figures ignore the many benefits – including supporting the
security of the grid – that are only beginning to be understood.
"The
battery has been dispatched on multiple occasions for both energy and
FCAS," a spokesman for the the Australian Energy Market Operator tells
Fairfax.
For December, "the battery was dispatched for energy on
over 380 separate five-minute dispatch intervals, and enabled on over
4600 separate dispatch intervals in one or more FCAS markets", he said.
'Significant' savings
The SA government also spruiks the benefits.
"It is difficult
to determine price trends at this early stage, however the battery has
been active in the Raise and Lower Regulation Frequency Control and
Ancillary Services [R-FCAS] markets since commissioning," a SA
government spokesman tells Fairfax.
"The cost of Raise and Lower
R-FCAS in SA in December 2016 was $502,320, compared with just $39,661
in December 2017, following the operation of the battery," he said.
"In
recent times FCAS services have cost South Australians about $50
million each year," he says. "The battery is expected to significantly
reduce the cost."
According to Mr McConnell, the battery
dispatched about 2.5 gigawatt-hours of electricity while consuming about
3 gigawatt-hours, representing a round-trip efficiency of about 80 per
cent.
"The performance to date has been very impressive. It's
ramp-up from zero output to maximum in seconds (or less) is something
that we haven't seen in the electricity market before," Mr McConnell
said, noting the current fleet of "fast start" units take five to 10
minutes to synchronise to the grid and start providing power.
Cases
of the Tesla battery responding without being "enabled" could also be
part of its testing, and there may also be arrangements with the SA
government separate from the FCAS market, he said.
Victoria moves too
A smaller 20-MW battery deal signed with last week between Neoen and
the Victorian government – again using Tesla – will provide similar
benefits to Victoria when it comes online in mid-2019.
The site,
next to a wind farm near the western Victorian town of Stawell, could be
the first of perhaps a dozen or more battery and storage ventures in
the pipeline, according to the Smart Energy Council.
"What we're
seeing in South Australia and in Victoria is really the tip of the
iceberg for projects that will be coming along," John Grimes, the head
of the council, said.
Bruce Mountain, director of Carbon and
Energy Markets, a consultancy, said the battery is already proving its
worth with the full implications still to come.
"The biggest
single source of insecurity to the power system is a trip of a major
coal thermal generator unit simply because they are so large – [it's]
not the wind or the sun, or people switching on their airconditioners,"
he says.
Batteries are also useful in taking up excessive supply
should demand suddenly drop, affecting the frequency of the grid on the
upside.
"In the olden days, this was simply sent out to large
heatloads, which would just heat up, and waste all the energy into the
air," he said.
Slowing down progress
The arrival of batteries and other storage that can be immediately
released has exposed flaws in the existing market. One issue remains the
fact generators supply at five-minute intervals that are priced on the
average over half an hour, with an alignment of the two not due to kick
in for years.
"Bringing the settlement period in line with the
trading period, which will come from 2021, will be a major step in
allowing batteries to compete effectively and get their full value,"
Mountain said.
That delayed implementation is "symptomatic" of how
the industry, including regulators, continues to be dominated by major,
centralised operators, he said. (AGL, Energy Australia and Origin
Energy are the three biggest so-called gentailers, combining generation
and energy retailing.)
"They do all they can to slow down progress
and ensure the market compensation mechanisms don't suit them,"
Mountain said. "And the energy market authorities have generally been in
their pockets."
The power industry has been struggling for years
as ageing coal-fired power plants close and shifting federal and state
policies have created busts and booms in renewable energy. Troubles
included South Australia and its 1.7 million residents being hit by a
blackout following a storm in September 2016 and NSW narrowly dodging
major forced outages during a heatwave in February 2017.
Snow job
Mountain is scathing of the federal government's response, not least
its promotion of the Snowy 2.0 pumped hydro scheme as a way to support
the grid.
By his estimates, it will need 1.8 megawatt-hours to
generate each MW-hour of storage for the proposed scheme that Prime
Minister Malcolm Turnbull has touted as one of his government's major
responses to the nation's energy crunch.
"There is no doubt at all
that the revenues it will produce won't compensate the capital costs,"
Mountain says, estimating it would take as much as a decade to build and
balloon out to $8 billion – or four times Turnbull's initial estimate.
"It took them a couple of months to build Musk's battery, which is essentially a white good that you plug and play," he said.
"I've got absolutely no doubt that batteries will win hand over fist."
Households
and businesses are also seeing batteries emerge as a viable option to
add to solar panels, reducing exposure to higher power prices.
Mountain
estimates batteries and solar PV with grid back-up are "now competitive
on any grid offer" in South Australia, and the same is true for about a
third of residents in Victoria and NSW.
"It will be true for
two-thirds in a couple of years' time – if not in a year's time,"
Mountain predicts. "It's all happening very quickly."
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