Australian Daily Electrical Power Generation Data – Tuesday 10th July 2018

Posted on Wed 07/11/2018 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.

Tuesday 10th July 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 – 19430MW

Daily Peak Power Consumption – 29690MW

Daily Minimum Generated Power – 19900MW

Daily Maximum Generated Power – 30100MW

Average Total Power Generation – 24600MW

Total Power Generation In GWH – 590.4GWH

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 – 15850MW

Daily Peak Coal Fired – 19800MW

Average Coal Fired Generation – 18400MW

Total Generated Power – 441.6GWH

Average Percentage Of Total – 74.8%

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 – 1450MW

Daily Peak – 5400MW

Average Natural Gas Fired Generation – 2770MW

Total Generated Power – 66.48GWH

Average Percentage Of Total – 11.26%

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 – 2150MW

Daily Peak – 5200MW

Average Renewable Generation – 3430MW

Total Generated Power – 82.32GWH

Average Percentage Of Total – 13.94%

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 – 1500MW

Daily Peak – 4400MW

Average Hydro Generation – 2690MW

Total Generated Power – 64.56GWH

Average Percentage Of Total – 10.93%

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 – 320MW

Daily Peak – 1100MW

Average Wind Generation – 640MW

Total Generated Power – 15.36GWH

Average Percentage Of Total – 2.6%

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 – 460MW

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– 0.41%

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 – 3750MW

Average For Hours of Generation – 2350MW (7.30AM 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 – 3.94%


  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

This was the second day of the working week, and even with every school in Australia closed for the mid term break, power consumption across the board was still high, almost the same as two weeks back when all schools were operating as normal. Power consumption this week, when compared with that school week was only around 1000MW lower, and that’s only 3% lower, so, even so, you can see the impact that power consumption at schools has. It has also been colder across this whole area, so that adds somewhat to the totals as well.

It was most noticeable at that time of minimum power consumption, (the 4AM Base Load) when it was 1290MW higher than yesterday, indicating a cold morning across almost all of this coverage area. At the evening peak, it was only 140MW higher than at the same time yesterday.

The average power generation from every source was 600MW higher than yesterday at an average of 24600MW per hour.

Coal fired power supplied most of that with an increase of 400MW to an average of 18400MW per hour, and that was just slightly under three quarters of all power being delivered. Keep in mind here that while that average was 18400MW, the highest it was at the evening peak was 19900MW, and with still only four Units off line, those remaining Units were all running at either right on, or close to their maximum power generation, and the power they were delivering at the evening peak was at an operational Capacity Factor of just over 94%.

The average for natural gas fired power was very high on this day, well due solely to the fact that there was very little from wind power. The natural gas fired power average was at 2770MW, up by 410MW from yesterday. Keep in mind that when wind power was high just last week, that average for natural gas was only 620MW, so on this day, it was 2150MW higher than it was last week. It is even more noticeable comparing the peaks for natural gas on both days. On that day when natural gas was only at an average of 620MW, the peak was only 1210MW, while on this day, it was 5440MW, so 4230MW higher.

The average for hydro power was also up on this day, by 120MW, to 2690MW, again used in conjunction with natural gas fired power to augment the totals when wind power is low.

Wind power on this day was low across the board again, at an average of only 640MW, delivering only 2.6% of the power required across the whole day. That total for wind power was at a daily operational Capacity Factor of only 12.3%. With wind power only delivering 2.2% at the peak, that also means that the combined totals for wind power, solar power, and rooftop solar power, those renewables that are supposedly ‘the way of the future’ were only delivering that same 2.2%, because at 6PM, the Sun had well and truly set.

So, again we have the case which highlights the variability of wind power, and how, whatever wind power does, it has no effect at all on what coal fired power does, when coal fired power delivers the vast bulk of the power required to run the Country.

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.