Australian Daily Wind Power Generation Data – Friday 25th September 2020

Posted on Sat 09/26/2020 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.

Friday 25th September 2020

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 7728MW, and this is from the current total of 64 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 – 2361MW (4.10AM)

Daily Maximum – 4596MW (7.30PM)

Average Wind Generation – 3496MW

Total Generated Power – 83.90GWH

Percentage Supplied By Wind Power At The Low Point For The Day – 13.2%

Percentage Supplied By Wind Power At Peak Power For The Day – 4422MW of 26950MW – 6.35PM – 16.41%

Average Percentage Of Overall Total Power Generation – 15.00%

Daily Operational Capacity Factor – 45.24%

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

Wind generation was higher on this day than it was on the day before, and that average of 3496MW gave wind generation a daily operational Capacity Factor of 45.24%, well up on the year round average of 29%. It was also (relatively) high at the usual evening peak when wind was delivering 16.4% of all generated power, and averaged 15% across the whole day. Again note the difference between the low for the day and the high, and it was almost 2300MW for this day, and that high was one of the highest in recent times, close to 5000MW, Now with a high like that it somewhat ‘squashes’ the scale of the graph itself to fit in that high, and as a result of this, those dips you see in the middle of the graph do not look as large as they actually are, because three of those dips are between 700MW and 750MW and there are quite a few more dips in the range of 250MW to 500MW, spread across those many hours in the middle of the graph. These are considerable falls as a large number of wind plants are taken off line because of high wind situations. This again further accentuates the fact that wind generation is not stable and it is not reliable, and those large swings in power generation are not good for the continuous smooth operation of the grid.


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.