Australian Daily Wind Power Generation Data – Wednesday 23rd October 2019

Posted on Thu 10/24/2019 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.

Wednesday 23rd October 2019

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 6702MW, and this is from the current total of 55 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 – 504MW (6.10PM)

Daily Maximum – 1329MW (11.55PM)

Average Wind Generation – 891MW

Total Generated Power – 21.40GWH

Percentage Supplied By Wind Power At The Low Point For The Day – 2.07%

Percentage Supplied By Wind Power At Peak Power For The Day – 2.40PM – 3.22% (Evening peak at 6.40PM – 3.04%)

Average Percentage Of Overall Total Power Generation – 3.9%

Daily Operational Capacity Factor – 13.23%

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 again was another very poor day for wind power generation, the third consecutive day it has been so low. The operational Capacity Factor for this day was just 13.23%, lower than half the year round average for wind power. Again note that at the low point for the day, wind power was only delivering 2% of the power required to run the Country. That low point was at around the same time as the evening peak, when electrical power consumption is usually the highest for the day. Again, if this is supposed to be the direction we need to take, with forever more wind power supplying the needs of the Country, then what will happen when there are times like this, times when wind power is barely managing to deliver 2% of what is needed?

Consider this. The total number of Units delivering coal fired power is 48. There are currently 14 of them off line, so coal fired power is operating at a much reduced level and that is pretty much normal for this time of year because the operators of those plants are using this time of reduced power consumption (also normal for this time of year) to carry out maintenance on their Units so they will be ready for the Summer, when power consumption spikes to the normal high levels of Summer. So, right now, coal fired power is operating at a very much reduced capacity. Keep that in mind.

Here we have 55 wind plants across this vast coverage area in Australia. In total they have (around) 3700 individual wind towers. The total Nameplate for all these 55 wind plants comes in at 6702MW. Over the last THREE DAYS, the total power delivered by ALL of these wind plants comes in at 65.54GWH. (GigaWattHours) That same power, (65.54GWH) was delivered by a much reduced coal fired power sector in ….. TWO HOURS AND FIFTY MINUTES.

Again, I will include two extra images here and explain them. (and again, keep in mind these images are sized to fit the page, and 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)

This first image at right shows the total wind power generation on this day for the State of Victoria. In this State there are 17 wind plants in all, with a Nameplate of 2116MW. As you can see here, the wind picked up at 6PM, and wind power started to increase its output. However, look at that period of time before this, and here I have included the vertical time indicator at 7PM. (1900 on this graph) In the 19 hours prior to that time it started to rise, wind power in this State delivered an average of 42.5MW an hour at a Capacity Factor of just on 2%. So, for approximately 1200 individual wind towers, for 19 long hours only 24 of those wind towers actually had their blades in front turning over. The total power delivered at any one point in time was never higher than the time indicator total of 86MW, and for two and a half hours across the day, all that was being delivered was less than 10MW. In that same State, there are three coal fired power plants with ten Units in all, and three of them are currently off line. Those remaining seven Units ticked over all day delivering an average of 3570MW per hour, 88 times the power from those 17 wind plants.

This next image at right again shows the total from the Macarthur wind plant, and this makes three days running I have included the image for power output from this one wind plant. This plant is also in that same State, Victoria. It has 140 individual towers and a total Nameplate of 420MW, and it is the largest operational wind plant in Australia, and cost $1.2 Billion. As you can see, the wind which came back at the same time as for the graph above, also helped this one wind plant to increase its output as well, and by Midnight, it was back up to 270MW output, operating at a little more than 60% Capacity Factor. Even so, you can see that prior to this it was virtually the same as it was on Monday and Tuesday, just rolling along the zero line with 9.5 hours at that zero output level. Again, I have included the vertical time indicator at the maximum for the day prior to the big surge, and that was at 7.10AM and under 30MW. It has been like this for the last three days, with virtually no output at all. See that surge in power output from 6PM till Midnight. During those six hours, this wind plant delivered just a little less than the same power for the previous two days an 18 hours. I often use the large coal fired power plant at Bayswater for the sake of comparison, so let’s do that again here, Currently, Bayswater has one of its 660MW units off line while it undergoes Overhaul and upgrade to extend its life. That leaves just three of its Units on line, and the plant can only deliver around 1900MW maximum. So, across the last three days, this largest wind plant in Australia has delivered 1488MWH of power to the grid in its home State of Victoria helped by that surge there in the last 7 hours when it delivered 715MWH of that total. That same amount of power was delivered by the Bayswater plant running at three quarters capacity in FIFTY MINUTES. Three days of power in total from this one wind plant delivered by ONE coal fired plant in 50 minutes.

It’s just not acceptable, and the mosy unacceptable part of it all is that no one is being told about it.


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.