Connect with us

Hi, what are you looking for?


Clean Power

Australia’s Big Wind Energy Week — Graph Of The Day

Originally published on RenewEconomy.
(Republishing of this article is not permitted without the consent of RenewEconomy.)

Today’s graph of the day is a follow-up to a story nearly two weeks ago, when Ketan Joshi brought us news of how wind energy had supplied some 47 per cent of South Australia’s overall electricity requirements from August 10-18.

These graph below come from analyst and advisory firm IES, and many thanks to Andrew Reidy for putting them together. They tell us that South Australia’s was not the only landmark during the week. Wind energy also provided 7.6 per cent of the entire wholesale demand in the National Electricity Market. This graph below shows how much growth that represents over the previous 18 months. The bulk of Australia’s renewable energy production is normally sourced through hydro.


There were a few landmarks for individual states as well. This graph below shows Tasmania sourced nearly 14 per cent of its demand via wind energy in that week, although it had a particularly strong week in early July when nearly 16 per cent came from wind.


Victoria also set a record of its own with nearly 10 per cent coming from wind energy. Its steady rise over the last few months is due to the addition of the 420MW Macarthur wind farm, which is the biggest in the country.


And here is the graph for South Australia. It is interesting to note that the 47 per cent that was delivered in August is not the record. The first week in September last year delivered 49 per cent, and there have been numerous peaks above 35 per cent over the last 18 months. In fact, the Australian Energy Market Operator says that wind energy accounted for 27 per cent of demand for the entire 2012/13 fiscal year.


So, why so much wind energy in this one week. One reason is the increasing amount of wind generation capacity, but the biggest cause for this particular week was a series of cold fronts that hit Australia, and consistently strong westerly winds for all that week.

It could have been even more if a fourth cold front had not been deflected south of Australia. The cause is apparently due to a climate pattern called the Southern Annular Mode (SAM), also called the Antarctic Oscillation(AAO).

According to the Australian Bureau of Meteorology, the SAM is a measure of the strength and position of the westerly winds that circulate around Antarctica.When SAM is in a positive phase the polar westerly winds speed up causing low pressure systems and cold fronts to contract towards the South Pole.

A negative phase SAM involves low pressure systems circulating closer to southern Australia. This results in more cold fronts sweeping up into southern Victoria in winter increasing the chance of rainfall, and the winds. Hence the graph below, where the SAM was strongly negative around August 16.


Appreciate CleanTechnica’s originality and cleantech news coverage? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.

Don't want to miss a cleantech story? Sign up for daily news updates from CleanTechnica on email. Or follow us on Google News!

Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.
Written By

is the founding editor of, an Australian-based website that provides news and analysis on cleantech, carbon, and climate issues. Giles is based in Sydney and is watching the (slow, but quickening) transformation of Australia's energy grid with great interest.


You May Also Like


One of ACE EV’s directors had previously helped build the “switch” vehicle, an early iteration of the ACE Cargo. The first ACE Cargo was...

Clean Power

Even though university is closed for the summer in Australia and students are dividing their time between catching some rays to patch their tans...


Australian media is awash with news of companies transforming Toyota’s Land Cruisers and Hilux into electric utes. One must ask, is Toyota blind to...

Clean Transport

The electric vehicle community is abuzz with news that BP has followed Ampol’s lead and is installing up to 60 high-speed chargers at various...

Copyright © 2023 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.