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 18 September 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 – 4182MW (12.10PM)
Daily Maximum – 7021MW (1.25AM)
Average Wind Generation – 5405MW
Total Generated Power – 129.72GWH
Percentage Supplied By Wind Power At The Low Point For The Day – 17.00%
Percentage Supplied By Wind Power At Peak Power For The Day – 4595MW of 25599MW – 6.45PM – 17.95% (Mid afternoon Peak with maximum rooftop solar added was 245000MW at 12.30PM)
Average Percentage Of Overall Total Power Generation – 24.29%
Daily Operational Capacity Factor – 54.85%
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.
Generated wind power total as a Percentage of overall total generated power from every source for this last week – 17.4%
Generated wind power total as a Percentage of overall total generated power from every source for the last year (52 weeks) – 12.3%
Capacity Factor for wind power generation for the last week (7 days) – 42.12%
Capacity Factor for wind power generation for the last year (52 weeks) – 30.63%
Capacity Factor for wind power generation for the longer term (207 weeks) – 30.41%
Nameplate change from beginning of data collection – (then) 5301MW – (now) 9854MW – (Change) +4553MW (an increase of 86%)
Comments For This Day
After a day of the highest power generation yesterday, this day saw power generation naturally lower, and the average for this day of 5405MW gave wind generation a daily operational Capacity Factor of 54.8%, still relatively high, and that was twenty four percent higher than the year round average. Wind was not much higher than its low point for the day at the usual time of the evening Peak of maximum power consumption, and at that time, wind was delivering almost 18% of all the generated power from every source. After that big high of the day before, you can see the falling away of power generation across the day, and that difference between the high for the day and the low was again quite substantial, and for this day, that gap was 2839MW.
When it came to the Weekly Update, look at that operational Capacity Factor (CF) percentage there of 42.1% for the week, and for a whole week, that is high indeed. Some perspective on that is that in the four years now I have been keeping this daily data, that weekly percentage for CF has only been higher than that on ten occasions, so only four times a year when it’s higher than 40% for a whole week., and on only one occasion in all of those four years has it been (only just) higher than 50%, so one week in four years when wind generation operated at HALF of its Capacity. Even with what was a pretty big week for wind generation, both of those long term averages for CF are still firmly at just 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.
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