Australian Daily Electrical Power Generation Data – Sunday 24th June 2018 – Plus Weekly And Rolling Totals

Posted on Mon 06/25/2018 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.

Sunday 24th 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 – 19410MW

Daily Peak Power Consumption – 28250MW

Daily Minimum Generated Power – 20500MW

Daily Maximum Generated Power – 29000MW

Average Total Power Generation – 23300MW

Total Power Generation In GWH – 559.2GWH

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 – 17100MW

Daily Peak Coal Fired – 19600MW

Average Coal Fired Generation – 18200MW

Total Generated Power – 436.8GWH

Average Percentage Of Total – 78.11%

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 – 950MW

Daily Peak – 4300MW

Average Natural Gas Fired Generation – 1910MW

Total Generated Power – 45.84GWH

Average Percentage Of Total – 8.2%

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 – 2500MW

Daily Peak – 4700MW

Average Renewable Generation – 3190MW

Total Generated Power – 76.56GWH

Average Percentage Of Total – 13.69%

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 – 1250MW

Daily Peak – 4000MW

Average Hydro Generation – 2430MW

Total Generated Power – 58.32GWH

Average Percentage Of Total – 10.43%

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 – 380MW

Daily Peak – 800MW

Average Wind Generation – 650MW

Total Generated Power – 15.6GWH

Average Percentage Of Total – 2.79%

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 – 420MW

Average Solar Plant Generation for hours of generation – 260MW (7.30AM till 5.30PM)

Average Solar Plant Generation across the whole 24 hour day – 110MW

Total Generated Power – 2.64GWH

Average Percentage Of Total across the whole 24 hour day– 0.47%

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 – 2900MW

Average For Hours of Generation – 1850MW (7.30AM till 5.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 770MW

Total Generated Power – 18.48GWH

Average Percentage Of Total across the whole 24 hour day – 3.3%


  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

Sunday, the day of rest, and also of lower power consumption as well, and while the minimum power consumption (the 4AM Base Load) was a little lower, the Peak power consumption at 6PM was actually 1400MW higher, and overall power generation figures reflected those changes, and the average power consumption across the whole day was 300MW lower at 23300MW, and that’s 7% lower than the average for this last working week days.

While the average power consumption was that 300MW lower, the average for coal fired power was the same as it was yesterday. This was despite the fact that one of the Units at the Stanwell plant in Queensland went off line at 1AM, so it was down all day, taking 365MW out of the system, and still coal fired power remained the same as it did for yesterday,

The average for natural gas fired power was 70MW lower, and the average for hydro power was 50MW lower. Solar plant power was 10MW higher, albeit still only delivering less than half of one percent of the required power across the day.

Wind power was also lower, making it low for all seven days this week, and today it was 190MW lower, at only 650MW, and that’s at a Capacity Factor of only 12.4%. At the evening peak, wind was delivering only 2.1% of the power being consumed at that same time.

Look here at that graph for natural gas fired power. See how it remained flat for most of the day, until the lead up to that evening peak. It usually has the morning peak to make up the extra power required at that time. On this day however, it wasn’t needed as nearly all the power requirement was being met by those coal fired plants, and any extra was made up from hydro. This of itself tells a tale. If they need power then they take it from the cheapest source and the last power to be used if needed comes from the most expensive form of power generation. So her we have plenty of coal fired power, a little hydro, and very little natural gas fired power. As it was, most of that natural gas fired power was being generated in the State without any coal fired power, South Australia. That State has a strong reliance on wind power, and the only backup they have is from natural gas fired sources of power generation. So, most of that natural gas fired power being consumed where that graph is flat is in that State, keeping in mind that South Australia is the second smallest power consumer in the Country at only 6.5% or so of the power being consumed in the Country.

So, with coal delivering the most, and then hydro, and lastly natural gas, then that only confirms that coal fired power is by far the cheapest method of generating power.


Here, the Overall is100%, so Coal + Natural Gas (NG) + Renewable adds up to that 100%

Hydro, Wind and Solar add up to the total for Renewable.

Rooftop Solar Power (which is behind the meter) is a percentage of the overall total and on top of that total.


Week           Overall        Coal         NG         Renewable        Hydro         Wind        Solar        Rooftop Solar

Week 6        4132.8        3088.8       382.56       661.44           505.8        138.72        17.04         153.12

Percentage of total       74.74%       9.26%         16%              12.24%        3.36%       0.41%        3.7%


Week                 Overall        Coal         NG        Renewable        Hydro        Wind         Solar        Rooftop Solar

After Week 6    23406.8    17268    2052.48     4086.32         2464.34       1529.42      92.56         895.5

Percentage of total             73.77%      8.77%       17.46%           10.53%        6.53%         0.4%          3.83%

COMMENTS for this week.

This was a week when Winter set in well and truly, and power generation figures rose accordingly.

It was noticeable the most at that 4AM Base Load time of minimum power consumption when the average for the week was over 19300MW, and that’s more than 7% higher than the year round average of 18000MW. On three days, it was almost 20000MW, and that’s a large total for minimum power consumption.

The average for power consumption from every source was 24600MW every hour, and because of that the overall power consumption of 4132.8GWH was higher for this week by 5% when compared to last week.

Now, while that overall average was 5% higher, the average for coal fired power was 9% higher than for last week. Coal fired power supplied just under 75% of every watt of power being consumed in this vast coverage area of Australia, and because it increased that took the rolling average higher as well, and now (settling down after 6 weeks) coal fired power is delivering almost 74% of the power.

The average for the week for natural gas fired power was up by a huge 81%, and keep in mind here that is from a low figure, so the percentage rise looks so much larger, and natural gas fired power delivered 9.26% of the power needed for this week.

Hydro power was also up, by 27% (again from a low figure as well) and hydro delivered 12.24% of the power for the week.

Solar power was up marginally, but keep in mind here that all that comes from these solar plants is less than half of one percent of the total power generation figure.

Rooftop Solar power was also up marginally, and even that only delivers 3.8% of the power to run the Country, and early all of that is consumed by the homes which actually have those panels on their roofs.

The big loser for the week was wind power, as first one, than a second large high pressure weather system hovered over that huge area where there are the largest concentration of those wind plants in the States of South Australia and Victoria. Wind power was down by 71% from last week’s total. That power delivery for the week equates to an average of only 825MW, out of a total nameplate of 5222MW, giving wind power an operational Capacity Factor (CF) for the week of only 15.8%. That took the rolling CF for six weeks for wind power to 26.4%, still lower than the yearly average of 30%. As you can see from that total for wind power, it only delivered 3.36% of the power used during the whole week, and that low figure took the 6 week rolling average for wind power down to 6.53%, and when wind power delivers that poorly, how do you expect to run a Country if we are to do as those green supporters say, and close down coal fired power plants, and then replace them with wind plants.

While that total for wind power for the week was so low, just quoting that low percentage tells only half the story. While power generation data here is shown in averages, actual power consumption varies greatly around that average. At the peak power time at 5.30/6PM it can be as high as 32000MW and it was almost at that figure twice this week. On one of those days, wind power, at that same peak power time was only delivering 0.33% of the power required, a third of one percent, and on another day it was also below 1% as well, and for the week, at that time, wind power only managed to deliver an average of 2.6% of the power required. That’s another indictment on wind power, and how we cannot expect to do anything if wind power is all there is. Keep in mind here, also, that at that peak power time, the Sun has set, so there is no power coming from any of those solar power plants, and there is also nothing being delivered from ANY of those rooftop systems, so, all those homes with panels on their roofs are back consuming power from the grid. So, the total power delivered on that day in question from all those now favoured renewable sources, wind and all solar, it only came in at 0.33% of what was being consumed at that same time.

What this Series of daily Posts and weekly Updates does is to show conclusively how we just CANNOT do without coal fired power. They have considerably ramped up construction of all types of those favoured renewable sources of power, and there are times when it delivers all but nothing at all. At the same time, they have closed down, and in the case of South Australia, blown up, coal fired power plants. And what has happened. Those remaining coal fired plants are now having to work even harder, and for longer, and have less down time, and they still supply the same power, in fact, even more power, than they did before those others were shut down.

Look closely again at the data for this week, and add together the totals for coal fired power and natural gas fired power, and that total comes in at 84% of power coming from fossil fuelled sources, so no matter what they say, these two fossil fuels used in power generation are actually what keeps the Country operating.

As I have said, coal fired power has an awful reputation, but here I show conclusively that it is actually ESSENTIAL.

There just is no substitute for coal fired power

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.