Australian Daily Wind Power Generation Data – Sunday 02 May 2021 – Plus Weekly Update

Posted on Mon 05/03/2021 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.

Sunday 02 May 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 8132MW, and this is from the current total of 67 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 – 1232MW (2.10PM)

Daily Maximum – 4104MW (12.05AM)

Average Wind Generation – 2376MW

Total Generated Power – 57.02GWH

Percentage Supplied By Wind Power At The Low Point For The Day – 6.3%

Percentage Supplied By Wind Power At Peak Power For The Day – 1899MW of 24100MW – 6.15PM – 7.88%

Average Percentage Of Overall Total Power Generation – 10.8%

Daily Operational Capacity Factor – 29.22%

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.


Generated wind power total as a Percentage of overall total generated power from every source for this last week – 7.2%

Generated wind power total as a Percentage of overall total generated power from every source for the last year (52 weeks) – 10.2%

Capacity Factor for wind power generation for the last week (7 days) – 19.56%

Capacity Factor for wind power generation for the last year (52 weeks) – 29.28%

Capacity Factor for wind power generation for the longer term (135 weeks) – 29.60%

Comments For This Day

After a day of quite large (relatively speaking) wind generation on the day before, on this day wind generation was considerably lower. That daily average of 2376MW gave wind generation a daily operational Capacity Factor (CF) of 29.2% almost right on the year round average. As you can yet again see, wind generation fell away across the day as overall power consumption rose. You can also see that because it was high on that day before this, then the difference between the high and the low for the day was quite large, and here that gap was 2900MW, a substantial difference. Now, also note those ‘spikes’ from 8AM till around 4PM. Those sudden losses of power are all of them in the vicinity of 400MW to 700MW, substantial and sudden losses, and so many of them across that period of time. They are from the one plant in Far North Queensland, Mount Emerald, and around eight to ten plants in Central Western Victoria. All of those losses are again because of high wind situation in those areas, and here, those hundreds of individual wind towers shut down automatically so that the blades are not destroyed in high wind situations. With so many of those power losses, it makes the operation of the grid so much more difficult.

When it comes to those long term CF averages, with so many days of such low power generation, then that sent both long term averages lower. The weekly operational CF was just 19.56%, and that was ten percent lower than the year round average, a substantially low average, because there are usually enough days during the week with higher CF, and even with one very high day this week, that CF was still well down. Because of that. both long term average well lower, with the rolling 12 Month average now closer to 29% than 30%


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.