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.
Thursday 23 June 2022
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 9854MW, and this is from the current total of 76 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 – 2970MW (12.01AM)
Daily Maximum – 6265MW (10.15PM)
Average Wind Generation – 4887MW
Total Generated Power – 117.28GWH
Percentage Supplied By Wind Power At The Low Point For The Day – 8.8%
Percentage Supplied By Wind Power At Peak Power For The Day – 5830MW of 28900MW – 6.15PM – 20.17% (Mid afternoon Peak with maximum rooftop solar added was 27405MW at 12.00PM)
Average Percentage Of Overall Total Power Generation – %
Daily Operational Capacity Factor – 49.59%
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.
- 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)
- For total power in GWH, multiply the average daily power by 24, and then divide by 1000.
- 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 was another of those good days for wind generation, again tempered bu irony. The average for this day of 4887MW gave wind generation a daily operational Capacity Factor of 49.6%, and again, the irony I mentioned, a good day, and wind still is only operating at less than HALF of its total Nameplate. Wind was rising at the usual time of the evening Peak of maximum power consumption, and at that time, wind was delivering a reasonable total of 20% of all the generated power from every source. With that regular rise across the day (well, sort of anyway) there was a substantial difference between the low for the day and the high, and for this day, that gap was 3295MW. One thing to notice here is that spiky nature of the power generation from 1AM till 5PM, and you can see those times when wind fell away, came back on, fell away, came back on etc. On the graph, as I have highlighted at the top, and in red, the nature of the graph, is that it is scaled to fit inside the same sized ‘box’ every day, so while those spikes look relatively small, they are in fact quite significant. Each loss of power is between 200MW and 300MW, and during that seven hour period, there are around 15 or so of the small (looking) ones, and the big loss there between 11AM and 11.30AM is a loss of more than 600MW. So with those seemingly smaller ones of a loss of 200MW, that’s around 60 turbines just turning off, and then coming back on a little while later, only to almost immediately turn back off. That loss of more than the 600MW is around 200 turbines turning off. That of itself, happening so many times does not make for a very 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.
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