Australian Daily Electrical Power Generation Data – Thursday 16th May 2019

Posted on Fri 05/17/2019 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 all of the images, and that even though they look similar in size of generation, 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 16th May 2019

Total Power Generation All Sources

Here, the total power generation from every power plant source is the top of the load curve, with each colour indicating a source of power generation. 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. The other colours mixed in with the rest of them are from those smaller Other sources. 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 – 18130MW (3.40AM)

Daily Peak Power Consumption – 26390MW (6.40PM)

Daily Minimum Generated Power – 18400MW (3.40AM)

Daily Maximum Generated Power – 26700MW (6.40PM)

Average Total Power Generation – 22850MW

Total Power Generation In GWH – 548.4GWH

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 for all three colours, the grey, dark yellow and purple colours combined in the image directly above.

The black line just under that top black line is the Sub Total just for coal fired power, and that is the same as the combined colours of the grey and ark yellow on the image above. 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 – 14800MW

Daily Peak Coal Fired – 18260MW

Average Coal Fired Generation – 16750MW

Total Generated Power – 402GWH

Average Percentage Of Total – 73.30%

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 – 1490MW

Daily Peak – 4690MW

Average Natural Gas Fired Generation – 2300MW

Total Generated Power – 55.2GWH

Average Percentage Of Total – 10.07%

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 the three 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) and those smaller Other sources 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 (that black line, which also includes RTS as well) 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. 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 (4AM) and maximum power consumption. (around 6/6.30PM)

Daily Minimum – 1900MW

Daily Peak – 5000MW

Average Renewable Generation – 3260MW

Total Generated Power – 78.24GWH

Average Percentage Of Total – 14.27%

Generation From Other Sources

This image shows the power being generated from the smaller sources other than the major sources of power generation. These include Natural Gas/Diesel, Natural gas/Fuel Oil, Coal Seam Methane, Diesel, Kerosene, Waste Coal Mine Gas and Bagasse. All of these are fossil Fuels, excepting Bagasse which is sugar cane waste mostly used to provide main and auxilliary power at sugar mills.

Note the scale change here, as these are smaller producers of power, and the scale is changed so they can be more easily shown on the graph.

For the data here, I have just added the average generation across the day, the total generated power from all these sources, and the percentage of the total.

Average Generation – 540MW

Total Generated Power – 12.96GWH

Average Percentage Of Total – 2.36%

Hydro Power Generation

This image shows all Hydro power generation. It is the same as the blue colour 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 main 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 – 620MW

Daily Peak – 3610MW

Average Hydro Generation – 1870MW

Total Generated Power – 44.88GWH

Average Percentage Of Total – 8.19%

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 green coloured line in the image at the top showing generation from all sources.

The total Nameplate for all these wind plants is 6106MW.

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.

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 (4AM) and maximum power consumption. (around 6/6.30PM in Winter and earlier during the Summer Months.)

Daily Minimum – 310MW (3.35PM)

Daily Peak – 1830MW (11.55PM)

Average Wind Generation – 1040MW

Total Generated Power – 24.96GWH

Average Percentage Of Total – 4.55%

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 area you can just see in that top image.

The total Nameplate for all these 35 solar plants is 2549MW.

Daily Minimum – Zero

Daily Peak – 1310MW

Average Solar Plant Generation for hours of generation – 750MW (7.00AM till 6.00PM)

Average Solar Plant Generation across the whole 24 hour day – 350MW

Total Generated Power – 8.4GWH

Average Percentage Of Total across the whole 24 hour day – 1.53%

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 8000MW and higher, and that is a large total. However, that total equates to almost 2 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 is only consumed in the local residential areas. While seemingly still high this total is spread across that huge number of installations across the whole of this coverage area.

Daily Minimum – Zero

Daily Peak – 3330MW

Average For Hours of Generation – 1740MW (6.30AM till 6.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 840MW

Total Generated Power – 20.16GWH

Average Percentage Of Total across the whole 24 hour day – 3.68%

Wind And Solar Power Generation Versus Total Power Generation

This image shows the total power generated from all the wind plants, and all the solar power plants in this coverage area, combined in the one image, and compares it to the overall total generated power, the black line at the top of the graph, which also includes RTS as well. Wind power is the green coloured area, and solar plant power is the red coloured area, and these are the same as shown in those other coloured images at the top of the Post.

I have also added the data below for the total generated power for both wind and solar plant power combined, and the percentage of the overall total below for the maximum power from both sources with respect to the overall total, both at the maximum for both, and then for the total for both at the daily peak Power time.

Daily Peak for Wind and Solar Plant Power – 2200MW

Average Across the whole day – 1390MW

Total Generated Power – 33.36GWH

Average Percentage of Total across the whole 24 hour day – 6.08%

Total Generated power at the daily maximum for both wind and solar plant power, the time of that maximum, and percentage of the total at that daily maximum –  2200MW – 10.45AM – 10.09%

Total Generated power for wind and solar plant power at Peak Power Consumption time for the day, and percentage of total at that daily Peak Power time – 600MW – 6.40PM – 2.25%

Overall Total With Rooftop Solar Power Added

This image shows the overall total generated power with Rooftop Solar Power (RTS) added to the total from all of the power plants. RTS is shown here as that orange colour added near the top of the graph in the middle, during daylight hours, and is indicated on the legend below the graph as Rooftop PV (PhotoVoltaics). The new overall total is that black line along the top of the Load Curve. Note here that with this RTS total added, the shape of the full load curve, the black line now looks almost exactly as Summer load curves used to look prior to the advent of RTS, and all those panels on roofs of private dwellings.


  1. Finding Averages – On each (non solar) graph, there are 25 hourly time points, starting with midnight and finishing with midnight. I have added the total at each time point together, and divided by 25.
  2. For both solar power averages, I have used the same addition of hourly time points and then divided by the same number of those time points of actual generation. Every so often, as the days get longer (or shorter after Summer) I change the hours of generation as those hours change.
  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, all renewables, and those other smaller sources add 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

For the fourth day in a row, power consumption remained relatively stable, and the same applied also for the overall power generation, and the total for this day was the same as for the day before, 548.4GWH at an hourly average of 22850MW.

The early AM Base Load was 100MW higher than it was on the day before, at 18400MW. The evening peak was the same as for the day before, a little later in the evening at 6.40PM, and it was 26700MW. In the five States with their own individual peaks at slightly differing times, the peak in New South Wales (NSW) was 70MW higher. In Queensland, their peak was just 10MW lower. In Victoria, it was 40MW higher. In the two lowest power consuming States, the peak in South Australia was 10MW higher, and in Tasmania, it was 70MW higher.

The average for coal fired power was 100MW higher at an hourly average of 16750MW. The range between the low for the day and the high was 3460MW, and coal fired power reached a maximum power generation of 18260MW. In Queensland, Unit 3 at the Callide plant continued its rise back to maximum power output started very late last night, and by 1.30AM, it was back at its maximum power generation. Also in Queensland, Unit 2 at the Stanwell plant had a problem and went off line at 10.30, but it couldn’t have been too much, as it was back on line at 11.30, rising almost straight back to its maximum power output. In NSW, Unit 4 at the large Eraring plant went off line between 9.30AM and Midday, slowly falling to zero output, and then it came back on line at 1PM, after only one hour at zero, and it slowly rose back to its maximum by 4PM, in time for the evening peak in NSW.

The average for natural gas fired power was lower by 90MW. The average for those smaller Other sources was lower by just 30MW. The average for hydro power was lower by 100MW, and again note from the green line on that hydro graph that again, one of the largest suppliers was the large plant at Murray One and Two. The average for solar plant power was slightly higher, up by 20MW.

Wind power was still low on the day, up by only 100MW to an hourly average of 1040MW, and that gave wind power a daily operational Capacity Factor (CF) of 17.03%, just a little above half that yearly average. However, look at that low point for wind power of just 310MW. That’s from a Nameplate of 6106MW, so it was only operating at a CF of 5%, and at that time wind power was delivering just 1.4% of the power required at that time, and that’s actually pitiful really, that a source of power we are told is what is needed more than any other source, and it can only deliver what is actually tiny amounts of power at times, and with nowhere near the reliability of the sources it is intended to replace. (more about wind power a little lower down here in the text)

You’ll notice that on the graph which shows wind power and solar power combined versus the total power required (the graph second from the bottom) I have highlighted it with an indicator how much power is being delivered from both sources and compared that with the overall at the same time, and that time is shown at the bottom, 1750, and that’s 5.50PM. The total for both wind and solar is shown at the left bottom there, where it indicates 0.0/0.4, and that’s zero from solar plants and just 400MW from Wind power at that time when both combined were at their lowest point. The overall is at the top left there, showing 26.3, and that’s 26300MW. So both of them were delivering just 1.52% of what was required at that time, again showing conclusively that wind and solar power can never be relied upon to deliver power on a reliable basis, and the purpose of this graph in the first place is to show just how much power is really delivered from these two sources, and as you can see (every day) it hovers just a little above that zero line along the bottom of the graph, and at its even at its best, it’s still only a tiny amount of power.

On a day when the overall stayed the same and coal fired power rose slightly, coal fired power delivered 73.3% of all the power needed across the day.

Now, here I have a second graph showing wind power, and this is really worth pointing out. That graph is at the right here, and if you click on the image, it will open in a new and and at a larger size, and here I have purposely made this graph larger so you can better see the detail I want to show you. Now, this graph shows the output from EVERY wind plant in the State of Victoria on this same day, 16th May 2019. As you can see from the graph, I have ticked just the boxes for the wind plants in that State of Victoria, and in the main body of the coloured ticked boxes it shows the colours for all 16 wind plants in that State, and the colours correspond with the colours on the graph. All up, these 16 wind plants have a total Nameplate of 1972MW, so there are around one thousand of those individual towers at those 16 wind plants. Now look at that left vertical axis, and right at the top, it indicates that line along the top is 200MW, so, at no time ever does the black line total reach 200MW, not even close.

The black line on the page shows the TOTAL power output for all 16 plants.

Note that at Midday, the total output drops to ZERO, and then stays there for the next seven hours. ZERO output from 16 wind plants for SEVEN HOURS. However, note here that you can see that black line indicating the total, is actually rolling along UNDER the zero line.

That’s not the end of it though. Look very closely at the graph. You’ll see I have highlighted with a vertical line at the time, 1610, and that’s 4.10PM. Now note at the left the total there, ….. MINUS 5.8. That’s Minus 5.8MW. So not only are these wind plants generating no power at all, but they are in fact drawing power from the grid. That one vertical blip you see there is one of three larger blips, a further one to the right and to the left of that highlighted one, and both of those are also at MINUS 5.2 and Minus 5.8.  However, that too is not the end of it. See to the left of Midday, those morning hours, well, you can see the coloured lines indicating the output from each plant. That’s only half of them, perhaps less, because for all of the morning and through until 7PM, more than half of those plants were generating no power whatsoever. I have left this graph large so that you can just make out some of those colours falling below the zero line, as almost half of those plants were also drawing power from the grid.

So, then the total power delivered from every one of those 16 wind plants and 1000 or so towers for this day in that State of Victoria came in at an hourly average of, wait for this, ….. 26.72MW. That’s at a CF of 1.35%, so if there are around 1000 of those individual towers across the State, the daily average was only 13 of them actually having their blades turning, and for seven long hours not one tower in that State of Victoria had its blades turning, not only not generating any power, but in fact, drawing power from the grid, 15MWH of power all up for just those seven hours at zero, so more in fact when the morning with all those other plants also drawing from the grid as well is taken into account, and to use wind power’s own false analogy, that’s the equivalent of around 900 homes worth of power.

So then, something like this is a rare occurrence, but what it does tell us is that just what do you do when you do have times like this. I mean seven full long hours with no power at all, and virtually nothing across the whole day.

Again I say, if wind power is the answer, then someone is asking the wrong question in the first place.

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.