Australian Daily Electrical Power Generation Data – Monday 18th June 2018

Posted on Tue 06/19/2018 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 18th 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 – 18550MW

Daily Peak Power Consumption – 31080MW

Daily Minimum Generated Power – 19200MW

Daily Maximum Generated Power – 32000MW

Average Total Power Generation – 25200MW

Total Power Generation In GWH – 604.8GWH

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 – 15500MW

Daily Peak Coal Fired – 19600MW

Average Coal Fired Generation – 18200MW

Total Generated Power – 436.8GWH

Average Percentage Of Total – 72.22%

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 – 800MW

Daily Peak – 5650MW

Average Natural Gas Fired Generation – 2300MW

Total Generated Power – 55.2GWH

Average Percentage Of Total – 9.13%

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 – 2750MW

Daily Peak – 6550MW

Average Renewable Generation – 4700MW

Total Generated Power – 112.8GWH

Average Percentage Of Total – 18.65%

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 – 1300MW

Daily Peak – 5750MW

Average Hydro Generation – 3530MW

Total Generated Power – 84.72GWH

Average Percentage Of Total – 14.01%

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 – 650MW

Daily Peak – 1600MW

Average Wind Generation – 1070MW

Total Generated Power – 25.68GWH

Average Percentage Of Total – 4.25%

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 – 400MW (Cloudy conditions at some plants)

Average Solar Plant Generation for hours of generation – 240MW (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 -3400 MW

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 – 3.57%


  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

Winter’s first major chill happened on this first day of the working week. Power consumption always rises on working days, but across most of this vast coverage area, it was a very cold day, and because of that power consumption rose higher than it normally does for a working day.

The minimum power consumption at the 4AM Base Load time was 890MW higher, and at the evening Peak it was a very large 4000MW higher, at 31080MW, the first time over 30000MW for Winter and the first time over that figure since the Summer.

Because power consumption rose, then power generation also rose and that was reflected in the figures for all power generating sources. The average power consumption for the day, 25200MW was 2200MW higher than it was the day before, the weekend Sunday, and that’s a substantial 9.6% higher, and that figure was even 5% higher than for the working days last week, all attributable to the cold snap.

Because more power was needed across the board, then all sources contributed, well sort of anyway.

The average for coal fired power was 1500MW higher, and again, that is also quite a large increase. Those coal fired Units usually ramp up and down during the day matching the two peaks and the trough of the total power generation Load curve, but on this day most of them stayed at a higher level of power generation, reflected in that total average for coal fired power of 18200MW.

The average for natural gas fired power was 1270MW higher, most of that coming on line during the evening peak when it was 2200MW higher than yesterday.

The average for hydro power was higher by 1310MW, also mostly reflected at that peak when it it was 1650MW higher than for yesterday.

The average for solar power was higher by 30MW on the day, albeit at a total of only 100MW, contributing only 0.4% of the power required for consumption on the day.

The average for wind power was 1890MW lower than it was yesterday, a substantial drop, which I’ll explain in a little more depth below. At that evening Peak, wind power was a full 2000MW lower, hence, to cover the increase in overall power generation, and the loss from wind power, both natural gas fired power and hydro power had to deliver more, as well as the increase from coal fired sources. That average for wind power of 1070MW was at a Capacity Factor of 20%, lower than the yearly average.

Note that for wind power, the five marker points are the same as for the other sources, and while one of those points details the peak for power generation from that particular source, the peak for wind hardly ever correlates with the actual peak power consumption/generation for the day at 5.30/6PM. The three other sources, coal fired power, natural gas fired power and hydro power, well, their peak for the day is always at that same time of the peak for consumption during the day, but the wind can have its peak at any time during the day, and for this day, that peak for wind power was at Midnight, and it went downhill from there. So at the time when there is the greatest power consumption, hence power generation, wind power for this day was only delivering 700MW. Now look at the peak power generation for the day, and that was at Peak power (32000MW) time of 5.30/6PM, and that total at that time for wind power was only 2.2% of the total power generation, and you can’t run the Country if wind power is at that useless level, and that’s all there is, if they propose to take coal fired power away and replace it with mainly wind power.

Okay then, here’s why wind power was so low at that time. Look at the image at the right. (and again, click on the image and it will open in a new window at a larger size so you can better see the detail) This is the Synoptic Chart for Australia at exactly that peak power time of 6PM, and note the day and time in the bottom right corner of this image, Monday 6PM, the same time as the time of peak power consumption.

See that huge High Pressure system (1030 Hectopascals) across that lower area of Australia. That is directly over South Australia (where there is that large white arrow) and Victoria. (just above the letter H)

In that same large area is the greatest concentration of wind plants, and the total Nameplate for wind power in that area is a tick over 3600MW, and that’s just under 70% of the total Nameplate for all the wind plants in Australia, just in that area covered by that Huge High Pressure system. That system was hovering over that area, moving ever so slowly eastwards over time, but just sitting there at the peak power time. There was no wind, because that comes from the gradient between the High and Low pressure systems where the isobars are closer together, so at this time, there was no wind, it was almost still, and it was cold on top of that as well.

So, now look at this image at the right. This is for wind power across the whole of that area, both States of South Australia and Victoria. The total Nameplate for all that wind power comes in at 3608MW. Look at the graph at the 6PM time of peak power consumption/generation and note that the total for wind across this area of the largest concentration of wind power is only 210MW.

So here we have 210MW of power being generated from a Nameplate of 3608MW, at a Capacity Factor of only 5.8%, so in effect for all that wind power, only one in twenty of those huge wind towers actually has the blades out the front rotating.

When you take into account that the total power generation at that time was 32000MW, then this area is only delivering 0.66% of the power needed to run the Country.

60% of all the wind power in the Country only delivering less than 1% of the power.

Compare that to coal fired power, when at the same time, it was delivering 19600MW. almost 100 times the power. (93.3 times)

Note also that coal fired power ramped up from its minimum at 4AM to that 6PM peak by a full 4100MW, and that was from the same number of Units in operation across the whole day, and only four of those 48 Units are off line.

Here we have a normal working day, and on top of that, a very cold day as well, and when huge amounts of power are required to cover that, it seems that there really is only one source for all that, coal fired power, something that we just cannot do without.

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.