Australian Daily Electrical Power Generation Data – Monday 25th June 2018

Posted on Tue 06/26/2018 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.

Monday 25th June 2018

Total Power Generation All Sources

Here, the black line is the total power generation from every source. This is also the same as for total power consumption, which is slightly lower after minor grid losses are taken into account.

The Blue line is all fossil fuelled power generation. The orange line is hydro power generation. The purple line is wind power generation, and the red line is for solar power generation.

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.

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 – 19630MW

Daily Peak Power Consumption – 30870MW

Daily Minimum Generated Power – 20100MW

Daily Maximum Generated Power – 32000MW

Average Total Power Generation – 25100MW

Total Power Generation In GWH – 602.4GWH

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 – 17100MW

Daily Peak Coal Fired – 19750MW

Average Coal Fired Generation – 18600MW

Total Generated Power – 446.4GWH

Average Percentage Of Total – 74.1%

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 – 1300MW

Daily Peak – 5800MW

Average Natural Gas Fired Generation – 2700MW

Total Generated Power – 64.8GWH

Average Percentage Of Total – 10.76%

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 blue line) removed from the graph, As in that top image, it shows Hydro Power, (orange line) wind power, (purple line) and solar power. (red line) What I have then done is added the black line just above those coloured lines and this indicates the Sub Total of power from those three renewable sources only. This is 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 orange line is for hydro, the purple line is for wind, and the red line is for solar, and the black line is the Sub total for all renewable power. The other colour just showing 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 – 2350MW

Daily Peak – 5800MW

Average Renewable Generation – 3800MW

Total Generated Power – 91.2GWH

Average Percentage Of Total – 15.14%

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 – 1400MW

Daily Peak – 5600MW

Average Hydro Generation – 3210MW

Total Generated Power – 77.04GWH

Average Percentage Of Total – 12.79%

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 5225MW.

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 – 60MW

Daily Peak – 920MW

Average Wind Generation – 490MW

Total Generated Power – 11.76GWH

Average Percentage Of Total – 1.95%

Solar Power Plant Generation

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 1000MW.

Daily Minimum – Zero

Daily Peak – 375MW

Average Solar Plant Generation for hours of generation – 230MW (7.30AM till 5.30PM)

Average Solar Plant Generation across the whole 24 hour day – 100MW

Total Generated Power – 2.4GWH

Average Percentage Of Total across the whole 24 hour day– 0.4%

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 – 3400MW

Average For Hours of Generation – 2150MW (7.30AM till 5.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 900MW

Total Generated Power – 21.6GWH

Average Percentage Of Total across the whole 24 hour day – 3.59%


  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

Back into the working week, and power consumption, and generation rises considerably, as is usual.

The morning low power consumption (that 4AM Base Load) was only 220MW higher, still at almost 20000MW in total across those five States. However, at the 5.30/6PM time of peak power consumption, it was 2650MW higher than for yesterday, and that’s a substantial rise of 9.3%. Power generation rose accordingly to cover that large increase, and across the whole 24 hours power generation was larger, and that drove up the average generation from all sources, higher by 1800MW over yesterday’s figure, at an average of 25,100MW per hour, and that’s an increase of 7.7% over yesterday.

There are currently four of those coal fired power plant Units off line, and even with that, the average for coal fired power was 18600MW, higher than yesterday by 400MW.

Because more power was required to ‘top up’ the system because of that increased power consumption, the averages for natural gas fired power (+790MW) and hydro power (+780MW) were also up as well, and this was most noticeable at that peak power time, when each of these two sources was delivering an added 11400MW in total.

Solar power was down by 10MW, still delivering less than half of one percent of the power required at only 100MW average across the day.

Again, the stand out of the day was the failure of wind power to contribute on anything but an inconsequential basis. It was down by 190MW, and while that may not seem much of a fall, the average for wind power was only 490MW, so it was coming from an already extremely low total. That 490MW is at a daily operational Capacity Factor (CF) of only 9.4%, a pitiful number really.

However, as I have mentioned earlier, quoting the average for wind power across all 24 hours is only half the story, as at the peak power time of 6PM, wind power was only generating 150MW (CF = 2.9%), and I want you to consider this for a minute.

So, then, we have wind power with a Nameplate of 5222MW, Solar power plants with a Nameplate of 966MW and Rooftop Solar with a Nameplate of 7800MW, so we have a nameplate of (almost) 14000MW.


Think of that for a minute. There’s only 23000MW Nameplate of coal fired power plants in the whole of Australia.

So, these two renewables of choice, wind and solar make up 61% of the WHOLE coal fired fleet of plants.

Amazing, utterly amazing.

So, at the time of peak power consumption just yesterday, Monday 25th June 2018, at 6PM, all that renewable power of choice was delivering the following:

Rooftop Solar Power – ZERO. (The Sun has set)
Solar Power Plants – ZERO. (The Sun has set)
Wind Power – 150MW.

The AEMO coverage area of those five States was consuming 30870MW at that same time.

So, the renewables of choice, wind and solar power were delivering a grand total of 0.48% of the total power required.

Less than half of one percent of what was required to keep Australia running.

While at the same time coal fired power was delivering 19750MW and natural gas fired power was delivering 5800MW, so the dreaded ‘pair’ of fossil fuels were supplying a tick under 83% of all the power being consumed in this huge area.

When coal fired power is such a large contributor as can be so easily seen just by looking at this daily data, politicians can say whatever they like about how we need to phase out coal fired power, but unitil they can find a source of power as reliable and constant as this to supply those huge amounts of power, then it’s pretty obvious that coal fired power has a long life ahead of it yet.

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.