Australian Daily Wind Power Generation Data – Thursday 18 November 2021

Posted on Fri 11/19/2021 by


By Anton Lang ~

This Post details the daily wind power generation data for the AEMO coverage area in Australia. For the background information, refer to the Introductory Post at this link.

Each image is shown here at a smaller size to fit on the page alongside the data for that day. If you click on each image, it will open on a new page and at a larger size so you can better see the detail.

Note also that on some days, there will be a scale change for the main wind power image, and that even though images may look similar in shape for the power generation black line on the graph when compared to other days, that scale (the total power shown on the left hand vertical axis) has been changed to show the graph at a larger size to better fit the image for that graph.

Thursday 18 November 2021

Total Wind Power Generation

This image shows the total power generated across the whole day by every wind plant in this vast AEMO coverage area for Australia.

The total Nameplate for all these wind plants changes as each new wind plant comes on line delivering power to the grid. That current Nameplate is 8587MW, and this is from the current total of 69 wind plants.

Note that the shape of this wind power load curve does not follow the shape of the main load curve for total power generation, and that is seen in the image below, the solid black line across the top of the image for that graph. Wind power generates its power only when the wind is blowing, hence it does not follow the actual power generation Load Curve, which is also the the exact same shaped curve as for actual power consumption.

For this data, I have added the times for the daily minimum, and the daily maximum, to show how they do not correlate with the actual times of minimum power consumption (around 4AM each day) and maximum power consumption, the evening Peak. (at around 6.40PM in Winter and earlier during the Summer Months.)

Daily Minimum – 2835MW (10.55AM)

Daily Maximum – 5119MW (3.25AM)

Average Wind Generation – 3981MW

Total Generated Power – 95.54GWH

Percentage Supplied By Wind Power At The Low Point For The Day – 11.0%

Percentage Supplied By Wind Power At Peak Power For The Day – 3036MW of 24300MW – 6.45PM – 12.49%  (Mid afternoon Peak with rooftop solar added was 25980MW at 12.00PM)

Average Percentage Of Overall Total Power Generation – 17.6%

Daily Operational Capacity Factor – 46.36%

Wind Power Generation Versus Total Power Generation

This image shows the total power generated from all the wind plants in this AEMO coverage area, and compares it to the overall total generated power from every source of power generation, which is the black line at the top of the graph. Wind power is the green coloured area, along the bottom of this graph.

While the green colour in this image looks to be a different shape to the graph above, keep in mind here that the scale is completely different, and that green coloured Wind total is the same as for the image shown above, only with the scale changed so it can fit onto the graph.


  1. Finding Wind Power Average – On the graph, there are 25 hourly time points, starting with midnight and finishing with midnight. I have added the total at each of those hourly time points together, and divided the resultant total by 25 to give an average in MegaWatts. (MW)
  2. For total power in GWH, multiply the average daily power by 24, and then divide by 1000.
  3. For the Capacity Factor, that is calculated by dividing the average wind generation by the current Nameplate and then multiplying that by 100 to give a percentage.

Comments For This Day

This day again highlights the extremes of the up and down nature of wind generation. The daily average for this day of 3981MW gave wind generation a daily operational Capacity Factor (CF) of 46.4%, two and a half times what it was on the day before, and again ironically, on a good day for wind generation, it is still lower than half of its Nameplate of 8587MW, and that daily CF of that 46.4% was sixteen percent higher than the year round average. Wind generation was around its low for the day at the usual time of the evening Peak of maximum power consumption, and at that time, wind was delivering 12.5% of all the generated power from every source. As is always the case, there was yet again a substantial difference between the high for the day and the low, and that gap on this day was 2284MW.

Okay, now look again at that upper graph for wind power generation, and note those three pretty large and sudden losses of power during the day. There was a steady fall in power generation just after 6AM with a steady drop of 1310MW in 2.5hrs, and then at 9AM, there was a sudden loss of 800MW in ten minutes. Then, at around 11AM, there was an even larger sudden loss of 1100MW in five minutes. Then again, at just after 2PM, there was a loss of 1350MW, with 1200MW of that fall happening in fifteen minutes. Then again, at 4.30PM, there was a steady loss of 1650MW in two hours. Now, whatever the reason was for those losses of power over those short times, you can see that with large losses like that happening, that a reliance on wind generation (at any time) is something that is fraught with danger, if there are going to be sudden losses like this. Wind power supporters loudly claim that coal fired power cannot be relied on because they also suffer losses in power when one Unit drops off line occasionally. Here we have the equivalent of two to three of those coal fired Units falling suddenly off line removing power from the grid, and it happens five times in twelve hours, and the point being here is that no one knows when it is going to happen. This is further proof of the unreliability of wind generation on two fronts on just this one day, the first being that it was so much higher on this day than it was on the day before, and the second point that it quite literally failed on a large scale those five times across this day.

And all of this from a power source which only delivers a little more than ten percent of the overall mix of power, after billions and billions of dollars have been spent on what is only a marginal source of power at best, and wholly unreliable at that.


Anton Lang uses the screen name of TonyfromOz, and he writes at this site, PA Pundits International on topics related to electrical power generation, from all sources, concentrating mainly on Renewable Power, and how the two most favoured methods of renewable power generation, Wind Power and all versions of Solar Power, fail comprehensively to deliver levels of power required to replace traditional power generation. His Bio is at this link.