Australian Daily Wind Power Generation Data – Tuesday 15th December 2020

Posted on Wed 12/16/2020 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.

Tuesday 15th December 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 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 – 1070MW (10.30AM)

Daily Maximum – 3589MW (10.40PM)

Average Wind Generation – 2301MW

Total Generated Power – 55.22GWH

Percentage Supplied By Wind Power At The Low Point For The Day – 3.7%

Percentage Supplied By Wind Power At Peak Power For The Day – 1353MW of 30350MW – 12.30PM – 4.46%

Average Percentage Of Overall Total Power Generation – 9.1%

Daily Operational Capacity Factor – 28.30%

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

As I mentioned yesterday, there was a large High Pressure weather system moving into the area where the greatest concentration of those wind plants are, and wind generation would be going lower for this day, and that proved to be the case as you can see, with wind generation falling to its low for the day at around 10AM, after falling consistently since around the early evening of the day before. And then, ironically after the daily peak for power consumption had passed, wind generation started to rise again, and you can see the difference between the low for the day and the high, and here, that was 2500MW all of that in a twelve hour period. The daily average of 2301MW gave wind generation a daily operational Capacity Factor of 28.3%, around one percent lower than the year round average, and with the daily peak just over 30,000MW, you can see from the figures that wind generation was only delivering 4.5% of all the required generated power at that time.

Look at the image at right, and as with all images at these Posts, if you click on the image it will open on a new page at a larger size so you can see the detail better. Rather than cropping it as I do with the other images, I have left the details under the graph intact, as this shows you just which wind plants are indicated on the actual graph. Look right at the bottom, and you will see the five States where all these wind plants are located. The only box which is ticked is Vic1, and this indicates ONLY the wind plants in the State of Victoria. There are 24 of them in all, and on the legend above the States, these Victorian wind plants start with the one coded as ARWF1, and they are all the next ones right up to the last of them shown as YSWF1 just to the left of the Subtotal box.

Okay, so here I have hovered the mouse indicator at that point across the horizontal Time axis (from Tuesday at Midnight and at one hour intervals across the day to Midnight on Wednesday, so 24 hours one day in all) and that pointer indicates the time as 13.35, so 1.35PM. Now look across the page to the left side axis indicating the total power being generated, and as you can see right at the bottom, it is shown as 1.5. So here at this time, 1.35PM, all those indicated wind plants are only generating 1.5MW. Okay then, now go to the legend and see that I have ticked the boxes of all the indicated wind plants. So, here we have 14 wind plants in all with a total Nameplate of 1932MW, and at 1.35PM, all they are generating is ….. 1.5MW total. That’s 14 wind plants of 24 in total across this whole State, 24 wind plants with a total Nameplate of 2924MW.

So TWO THIRDS of the total Nameplate for wind power in the State of Victoria is delivering all but ZERO power.

Now, the point I am trying to make here is that if wind power is all we have to look forward to in our future with just Renewable power sources, what are we going to do when there are times like this, when ZERO power is being generated from what is supposed to become the largest source of power generation in our future. It may just be one point in time, but what do you do when that time eventually arrives?


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.