Australian Daily Electrical Power Generation Data – Wednesday 8th August 2018

Posted on Thu 08/09/2018 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.

Wednesday 8th August 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 – 18660MW

Daily Peak Power Consumption – 28250MW

Daily Minimum Generated Power – 19800MW

Daily Maximum Generated Power – 29000MW

Average Total Power Generation – 23900MW

Total Power Generation In GWH – 573.6GWH

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 – 14100MW

Daily Peak Coal Fired – 17500MW

Average Coal Fired Generation – 16500MW

Total Generated Power – 396GWH

Average Percentage Of Total – 69.04%

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 – 700MW

Daily Peak – 5050MW

Average Natural Gas Fired Generation – 2020MW

Total Generated Power – 48.48GWH

Average Percentage Of Total – 8.45%

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 – 4100MW

Daily Peak – 7100MW

Average Renewable Generation – 5380MW

Total Generated Power – 129.12GWH

Average Percentage Of Total – 22.51%

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 – 1450MW

Daily Peak – 5000MW

Average Hydro Generation – 2650MW

Total Generated Power – 63.6GWH

Average Percentage Of Total – 11.09%

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 – 1300MW

Daily Peak – 3500MW

Average Wind Generation – 2600MW

Total Generated Power – 62.4GWH

Average Percentage Of Total – 10.88%

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 – 550MW (Average peak at 500MW in cloudy conditions at some sites)

Average Solar Plant Generation for hours of generation – 300MW (7.30AM till 6.00PM)

Average Solar Plant Generation across the whole 24 hour day – 130MW

Total Generated Power – 3.12GWH

Average Percentage Of Total across the whole 24 hour day– 0.54%

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 – 3500MW

Average For Hours of Generation – 2230MW (7.00AM till 5.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 970MW

Total Generated Power – 23.28GWH

Average Percentage Of Total across the whole 24 hour day – 4.06%


  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 figures for today were similar to what they were on the day before, but again, the mix varied wildly. The total power consumption at that 4AM Base Load time as 330MW higher, and at the evening peak it was 330MW lower.

The overall average for power generation from every source was lower by 200MW, at 23900MW per hour.

The average for coal fired power was that same 200MW lower, so that effectively covered the overall drop. There are still eight Units off line, and still five of those in the State of New South Wales. With those eight Units off line, coal fired power is marginally lower all round, and even so, it was still only just one point under that 70% power delivery mark.

With the fall in the overall average covered by the fall in coal fired power, then we had a case of the other three main sources all equalling out, as the average for power delivered from the solar power plants remained the same at 130MW, which was just over a half of one percent of the power required on that overall basis.

The average for power generated by wind power was 740MW lower, and as you can see from the graph, it fell away from around 3PM, just as the start of rise towards the usual evening peak began to kick in. That average for wind power of 2600MW was still higher than the year round average, and gave wind power a daily operational Capacity factor of 48%.

That fall in wind power was covered by both of the other sources. The average for natural gas fired power was higher by 520MW, and most of that extra was during that evening peak, as wind power fell away, and that is evident in that second image down showing the total for all fossil fuels, the upper black line and the total for coal fired power, the lower black line, and you can that the gap between them at 6PM (1800) is a lot wider than it usually is, with natural gas fired plants delivering 5000MW of power, and at that time, that was almost 15% of all the power being consumed, and compare that to the daily average of only a little over 8% of the required power.

The average for hydro power was also higher, by 220MW, again most of that during the two daily peaks.

So, here is the perfect example of how just those two sources, natural gas and hydro power are being used to ‘moderate’ wind power, while coal fired power just hums along as it usually does.

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.