Australian Daily Wind Power Generation Data – Sunday 20th September 2020 – Plus Weekly Update

Posted on Mon 09/21/2020 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.

Sunday 20th 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 – 2551MW (1.30PM)

Daily Maximum – 4302MW (11.05PM)

Average Wind Generation – 3271MW

Total Generated Power – 78.50GWH

Percentage Supplied By Wind Power At The Low Point For The Day – 11.9%

Percentage Supplied By Wind Power At Peak Power For The Day – 3420MW of 23550MW – 6.35PM – 14.52%

Average Percentage Of Overall Total Power Generation – 16.2%

Daily Operational Capacity Factor – 42.33%

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 – 12.2%

Generated wind power total as a Percentage of overall total generated power from every source for the last year (52 weeks) – 9.0%

Capacity Factor for wind power generation for the last week (7 days) – 34.18%

Capacity Factor for wind power generation for the last year (52 weeks) – 28.67%

Capacity Factor for wind power generation for the longer term (103 weeks) – 29.44%

Comments For This Day

Wind generation was still relatively high, but a little lower than for the day before this one. That average of 3271MW gave wind generation a daily operational Capacity Factor (CF) of 42.3%, still well above the year round average of 29%. This was a typical weekend day, the Sunday, hence the lowest power consumption for the week, and ironically, wind has been its highest this week on these two weekend low power consumption days, when overall power consumption is around 10% lower than it is on weekdays at this time of the year, and this low power consumption on this day is 14% lower even than the year round daily power consumption average, so the irony that wind generation is high on a day like this Sunday is skewed because of the overall much lower power consumption.

When it came to the weekly update for all the stats, even though wind generation had three high days, that week long operational CF is barely two percent higher than the year round average and both long term averages hardly even moved from their 28/29% marks.

At a little after 9AM this morning, the Macarthur wind plant came back on line. This is still the largest wind plant in Australia, and it has been off line since the morning of Tuesday 25th August, so 26 days with not one watt of output from this wind plant, 420MW nameplate, at zero for 26 days.


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.