Australian Daily Electrical Power Generation Data – Monday 3rd December 2018

Posted on Tue 12/04/2018 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 3rd December 2018

Total Power Generation All Sources

Here, the black line across the top of the graph shows the total power generation from every source. 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. 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 – 17500MW

Daily Peak Power Consumption – 24950MW

Daily Minimum Generated Power – 18200MW

Daily Maximum Generated Power – 25800MW

Average Total Power Generation – 22600MW

Total Power Generation In GWH – 542.4GWH

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 – 14000MW

Daily Peak Coal Fired – 18640MW

Average Coal Fired Generation – 16610MW

Total Generated Power – 398.64GWH

Average Percentage Of Total – 73.50%

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 – 650MW

Daily Peak – 2110MW

Average Natural Gas Fired Generation – 1090MW

Total Generated Power – 26.16GWH

Average Percentage Of Total – 4.82%

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 grey, yellow and purple colours) 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 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 – 3100MW

Daily Peak – 6000MW

Average Renewable Generation – 4510MW

Total Generated Power – 108.24GWH

Average Percentage Of Total – 19.95%

Generation From Other Sources

This image shows the power being generated from the seven 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 – 390MW

Total Generated Power – 9.36GWH

Average Percentage Of Total – 1.73%

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 – 1000MW

Daily Peak – 2470MW

Average Hydro Generation – 1510MW

Total Generated Power – 36.24GWH

Average Percentage Of Total – 6.68%

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 5452MW.

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)

Daily Minimum – 1630MW (11.55PM)

Daily Peak – 3180MW (2.55PM)

Average Wind Generation – 2480MW

Total Generated Power – 59.52GWH

Average Percentage Of Total – 10.97%

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 29 solar plants is 2021MW.

Daily Minimum – Zero

Daily Peak – 1430MW

Average Solar Plant Generation for hours of generation – 900MW (5.30AM till 7.30PM)

Average Solar Plant Generation across the whole 24 hour day – 520MW

Total Generated Power – 12.48GWH

Average Percentage Of Total across the whole 24 hour day – 2.30%

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 – 4120MW

Average For Hours of Generation – 2220MW (5.00AM till 7.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1340MW

Total Generated Power – 32.16GWH

Average Percentage Of Total across the whole 24 hour day – 5.93%


  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

This was a back to work Monday, and as usual, power consumption, and from that, overall power generation rose significantly, up by 6.1% over the lower consumption weekend days. That overall power generation was up by 1300MW to an hourly average of 22600MW, and the evening peak is also beginning to slowly get higher as Summer approaches, up to 25800MW on this day.

The average for coal fired power made up almost all of that overall rise, and it was higher by 1230MW to an hourly average of 16610MW, contributing its highest at that evening peak, when it was delivering 18640MW.

In New South Wales, Unit 2 at the Bayswater plant came back up online at 4PM, and was almost back at its maximum power output by 9PM. In Queensland, Unit 5 at the old Gladstone plant went off line at 8PM, and took four hours to wind all the way back to zero output. Also in Queensland, the Stanwell plant, near Rockhampton had a problem with one of its Units, Unit Number 2, and it dropped off line at Midday falling off line back to zero almost immediately, and was out of action for 11 hours, before coming back on line. Interestingly here, the other three Units were derated in their power delivery at the time, and when this Unit failed, those other three Units wound up their power delivery to replace almost all of the power from that lost Unit, winding back again as it came back on line. There are now just six of those coal fired Units off line.

The averages for other power generation sources changed also. The average for natural gas fired power was higher by 130MW, the average for those smaller Other sources was higher by 50MW, and the average for hydro power was higher by 540MW, while the average for solar plant power was the same as it was the day before.

Wind power was good on this day, above average, but after the high of the day before, it was lower today by 750MW to an hourly average of 2480MW, which gave wind power a daily operational Capacity Factor of 45.5%, still well over average.

However, note something here. See how the average for coal fired power just about covered the rise in the overall average, and then note how wind power lost 750MW, and now add together the rise in NG, Hydro and Other sources, and that total is 720MW, almost covering the loss in wind power. See again how it confirms what I have always been saying here, that wind power, be it high or low, has no effect at all on what coal fired power does and that those other sources, NG, hydro and the smaller sources are used to even out the overall total for all non coal fired power when wind is high or low.

On a day when the overall rose significantly, and coal fired power rose to cover that, coal fired power delivered almost 74% of all the required 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.