Australian Daily Electrical Power Generation Data – Thursday 9th August 2018

Posted on Fri 08/10/2018 by


By Anton Lang ~

This Post details the daily power consumption 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 the scale change for some of the images. That scale (the total power shown on the left hand axis) has been changed to show the graph at a larger size.

Thursday 9th August

On this day, the site where I collect the data (at this link) changed their images to a new and better format, hence the change in these images. The most notable of these is the first image for the total power generated from all sources, adding the full colour for each individual total. The fourth and fifth images also show the colour for the individual sources.

Total Power Generation All SourcesHere, the black line across the top of the graph shows the total power generation from every source. This is also similar to the total power consumption, which is slightly lower after minor grid losses are taken into account.


The dark grey colour is for the black coal fired power generation. The yellowish colour is for the brown coal fired power generation. The purple colour is for natural gas fired power generation. The blue colour is for Hydro (water) power generation. The green colour is for wind power generation. The red colour in the dip between the two peaks is for solar power plant generation. Rooftop solar power is not included on this graph, as this shows just the power generation from all power plants only.

In the data below, both of those (exact) figures for total power consumption for the daily minimum and the daily Peak are taken directly from the AEMO site, adding up the totals for each of the five States in this coverage area. Also, note the slight difference between Total Consumed Power and Total Generated Power. That indicates some of the losses in the grid system.

Daily Minimum Power Consumption – 19460MW

Daily Peak Power Consumption – 27830MW

Daily Minimum Generated Power – 19900MW

Daily Maximum Generated Power – 28800MW

Average Total Power Generation – 23800MW

Total Power Generation In GWH – 571.2GWH

All Fossil Fuels Total – Coal Fired and Natural Gas Fired Power Generation

Here, the upper black line is the total from all fossil fuels, and this is the same as the blue line in the image directly above.

The black line just under that top black line is the Sub Total just for coal fired power. Note here how closely that coal fired line follows the shape of the upper Load Curve, and this indicates that coal fired power can be ramped up and down to follow actual power consumption.

Daily Minimum Coal Fired – 15700MW

Daily Peak Coal Fired – 17250MW

Average Coal Fired Generation – 16750MW

Total Generated Power – 402GWH

Average Percentage Of Total – 70.38%

Natural Gas Fired Power Generation

This image for Natural Gas Fired Power Generation shows the gap between the total for all Fossil Fuelled Sources of power generation and Coal Fired Power Generation in the image directly above.

Note here how closely the shape follows the total power generation Load Curve in the top image, indicating how these natural gas fired plants are used to smooth out the load curve to match actual power consumption.

Note also that while coal fired power provides the bulk of the power, these natural gas fired plants are used to add more power to the system during those time periods during the day when consumption rises for the morning peak, and the main evening Peak

Daily Minimum – 870MW

Daily Peak – 3780MW

Average Natural Gas Fired Generation – 1890MW

Total Generated Power – 45.36GWH

Average Percentage Of Total – 7.94%

All Renewable Power Generation Versus Total Power Generation

This Image shows just the gap between total power generation from every source and the total power from renewable sources only. It is the same image as the first image at the top here, only with the fossil fuelled total (the grey, yellow and purple colours) removed from the graph, As in that top image, it shows Hydro Power, (blue colour) wind power, (green colour) and solar power. (red colour)  This image is used here to highlight the gap between the total power generation and the total from renewable sources alone.

All Renewable Power Generation (Does not include rooftop solar generation)

This image is the same as for the one directly above for all renewable power, only with the total from all sources removed from the graph. As the scale of the left hand vertical axis has now changed, you can better see the detail of all renewable power. Again, the blue colour is for hydro, the green colour is for wind, and the red colour is for solar. The other colours you can just make out indicates smaller plants, mostly using biofuels as their fuel source, tiny plants adding up to a very small total and for a short time duration.

Daily Minimum – 3300MW

Daily Peak – 7600MW

Average Renewable Generation – 5160MW

Total Generated Power – 123.84GWH

Average Percentage Of Total – 21.68%

Hydro Power Generation

This image shows all Hydro power generation. It is the same as the orange line in the top image for power generation from all sources.

Again, note here that the shape of this load curve follows the shape of the main load curve for all power generation, in that it has similar peaks in the morning and for the man evening Peak. The coloured lines at the bottom of this graph indicate the power generation from each of the hydro plants in this coverage area.

Daily Minimum – 1730MW

Daily Peak – 4600MW

Average Hydro Generation – 2680MW

Total Generated Power – 64.32GWH

Average Percentage Of Total – 11.26%

Wind Power Generation

This image shows the total power generated by every wind plant in this vast coverage area. It is the same as for the purple coloured line in the image at the top showing generation from all sources.

The total Nameplate for all these wind plants is just under 5414MW.

Note that the shape of this load curve does not follow the shape of the main load curve for total power generation. Wind power generates its power only when the wind is blowing, hence it does not follow actual power consumption levels.

Daily Minimum – 1160MW

Daily Peak – 3200MW

Average Wind Generation – 2300MW

Total Generated Power – 55.2GWH

Average Percentage Of Total – 9.66%

Solar Power Plant Generation

(Note here that the Nameplate for solar power plants has gone up as more wind plants have been added to the grid, and now to the site where I get the data from, up from 1000MW to 1344MW)

This image shows the total power generated from all the solar power plants in this coverage area. This is the same as for the red coloured line you can just see in that top image.

The total Nameplate for all these 16 solar plants is just lower than 1344MW.

Daily Minimum – Zero

Daily Peak – 650MW

Average Solar Plant Generation for hours of generation – 400MW (7.00AM till 6.00PM)(Daylight hours are longer here by a further half hour)

Average Solar Plant Generation across the whole 24 hour day – 180MW

Total Generated Power – 4.32GWH

Average Percentage Of Total across the whole 24 hour day– 0.76%

Rooftop Solar Power Generation

As this source of power generation is classed as ‘behind the meter’, it is not included in the total power generation. Note here that the State of Queensland (QLD on the legend under the graph) is broken down into four separate areas as this is the largest State with the largest number of installations.

While the total Nameplate changes often, the latest information is that the total is now 7800MW, and that is a large total. However, that total equates to 1.8 Million homes with panels on their roof. That equates to an average sized installation of 4.3KW. Most of the power is consumed by the homes with the panels, and what is fed back to the grid, while seemingly still high is spread across that huge number of installations across the whole of this coverage area.

Daily Minimum – Zero

Daily Peak – 3270MW

Average For Hours of Generation – 2080MW (7.00AM till 6.00PM)(Daylight hours are longer here by a further half hour)

Average Rooftop Solar Generation across the whole 24 hour day – 950MW

Total Generated Power – 22.8GWH

Average Percentage Of Total across the whole 24 hour day – 3.99%


  1. Finding Averages – On each graph there are 9 time points. Add the total at each time point together, and divide by 9. For coal fired power, I do this on a State by State basis (for the 3 States with coal fired power) and then add the total for each State together.
  2. For both solar power averages, I have used the average for a (half) Sine Wave which is 0.637 of the Peak value.
  3. For total power in GWH, multiply the average daily power by 24, and then divide by 1000.
  4. The total percentages for coal fired power, natural gas fired power and all renewables adds up to 100%.
  5. The total percentages for Hydro, Wind, and Solar adds up to the total percentage for all Renewables.
  6. Total Generated Power is expressed here as GWH (GigaWattHours) and a GWH is a MWH (MegaWattHour) multiplied by 1000

Comments For This Day

The biggest change for this day is easily seen above as the images have all changed. The site where I collect the data and copy the images has changed its format, and it is now a little easier to do the data and the images were just a matter of resizing them in my own image program. It still takes around the same time to do all the work, but the change in those images somewhat enhances the Posts.

The figures again were similar to the day before, except, as usual, the mix changes with each day.

The power consumption at that 4AM point in time of minimum Base Load was 800MW higher, probably due to it being a colder morning in the Eastern and Southern States. The total power consumption at the 6.30 time of peak power consumption was 420MW lower.

The average for power consumption from every source was only 100MW lower than for the day before, at 23800MW per hour average.

The average for coal fired power was 250MW higher, and there are still eight Units off line. There was a ‘swap’ of power generation in the State of New South Wales, where they have the most Units (5) off line. Unit 2 at the Bayswater plant had a staged power reduction over 5 hours from 640MW back to zero, starting at 11AM. Just prior to that, at 9AM, the previously closed Unit One at the Mt. Piper plant came back on line, and over a time frame of 12 hours wound back up to its maximum, replacing the power from the now closed Unit at Bayswater.

The average for generated power from the natural gas fired plants was down by 130MW, and the average for hydro power was up by 30MW.

Wind power started at Midnight from a lower base than usual, and slowly increased power throughout the day to be at its maximum for the day at the following Midnight. That average for wind power was down by 300MW to an average of 2300MW, giving it a daily operational Capacity factor of 42.5%, higher than the yearly average.

As you can see from the note in red for Solar power plants, that average increased as the site where I take the data from also added more plants to the total, raising it from just under 1000MW to the new total of 1344MW. Now, a point here to show you. Note that new total of 1344MW and then note the peak for power generation from solar plants for this day was 650MW, less than half the total Nameplate, so even at its best in these Winter Months, it barely even manages half its total at the best time of power generation around Midday. Note also here that the time for power generation the total insolation, has increased a further half hour to eleven hours, as the hours of Sunlight increase. Even so, the average power generation for the full 24 hours was only 180MW, up on the day before by 50MW, and still only delivering three quarters of one percent of all the power being required. This effectively means that those soalr power plants are operating at a Capacity Factor of only 13.4%.

Again, on a day when the only thing that changed was the mix between the different sources, and with overall power generation slightly lower, coal fired power still delivered 70% of all the power needed to keep the Country running.

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.