Australian Daily Electrical Power Generation Data – Tuesday 7th August 2018

Posted on Wed 08/08/2018 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 7th 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 – 18330MW

Daily Peak Power Consumption – 28580MW

Daily Minimum Generated Power – 19200MW

Daily Maximum Generated Power – 29400MW

Average Total Power Generation – 24100MW

Total Power Generation In GWH – 578.4GWH

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 – 18100MW

Average Coal Fired Generation – 16700MW

Total Generated Power – 400.8GWH

Average Percentage Of Total – 69.30%

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 – 700MW

Daily Peak – 3600MW

Average Natural Gas Fired Generation – 1500MW

Total Generated Power – 36GWH

Average Percentage Of Total – 6.22%

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 – 4600MW

Daily Peak – 8200MW

Average Renewable Generation – 5900MW

Total Generated Power – 141.6GWH

Average Percentage Of Total – 24.48%

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 – 4550MW

Average Hydro Generation – 2430MW

Total Generated Power – 58.32GWH

Average Percentage Of Total – 10.08%

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 here the change in the Nameplate for wind power as another wind plant was added to the grid, and the new Nameplate is 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 – 2700MW

Daily Peak – 3700MW

Average Wind Generation – 3340MW

Total Generated Power – 80.16GWH

Average Percentage Of Total – 13.86%

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 – 475MW(Higher spikes 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 – 3200MW(Higher spike to 3500MW in cloudy and overcast conditions in most States)

Average For Hours of Generation – 2000MW (7.00AM till 5.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 875MW

Total Generated Power – 21GWH

Average Percentage Of Total across the whole 24 hour day – 3.63%


  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

(Note that from today, there is a new total for the Nameplate for wind power as another wind plant was added to the grid, and the new Nameplate is 5414MW. This increases the wind power generation, and will result in a new daily recalculated Capacity Factor)

After a solid rise in the overall power figures for the day before, those figures rose again today. The minimum power consumption, the 4AM Base Load was 770MW higher, and again, it’s easy to watch this number especially, and see the colder mornings, as another cold spell set in across those Eastern, mostly Southern States. The peak power consumption at 6PM was only 40MW higher, virtually the same as for the day before.

Power generation from all sources rose to cover the increases across the day, and the average for power generation from every source was 400MW higher than for the previous day, at 24100MW.

The average for coal fired power was 500MW higher, and again, nearly all of that was from the State of Victoria, where all ten Units, which for some reason, dropped 1200MW in total yesterday, rose back to their normal levels at 4.30AM during the morning, and within two hours were back to normal, restoring all 1200MW. So, those plants operated at reduced power generation for only 19 hours.

Another one of the four Units at the Liddell plant went off line at close to Midnight. Of some concern I might guess would be the situation in the State of New South Wales, where now, five of their Units are off line, one at Bayswater, two at Liddell, and one each at Mt.Piper and Vales Point. This effectively removes around 3000MW from the total for that State. Because of that, the State is drawing extra power from Queensland to the North and from Victoria to the South, and Victoria is drawing extra from its two bordering States, all of this via those Interstate Interconnectors, giving a further example of how power sharing arrangements between the States keep the grid operating at an optimum level. Why this might be of some concern is that New South Wales is the largest power consuming State in Australia.

The average for natural gas fired power was higher by 140MW, again adding extra at the two daily peaks.

The average for hydro power was higher by 510MW, and here I might think that extra hydro power would be assisting with the loss of coal fired power in New South Wales.

As you can see from the graph for solar power, it was also affected by overcast and cloudy conditions at some sites but was still slightly higher on the day.

You can also see how that overcast and cloud affects the power generation from rooftop solar power as well, with that large dip at around the time of peak power generation around Midday. Some of the States were lower in power generation, and you can see how even small dips in each State are accentuated when they are combined into the total, the upper black line, which at around that time when it should be generating at its maximum, actually fell by around 2000MW for an hour or two.

As I mentioned above the Nameplate for wind power changed, and while this may have happened earlier, the new total was only added recently. That average for wind power was a little higher on the day, by 230MW to an average of 3340MW, and this gave wind power a daily operational Capacity Factor of just over 61%.

Now, as you can see over the last week or longer, wind power has been high, and yet, even with that, coal fired power is remarkably similar at all occasions to what it always has been delivering. Wind power really has little effect at all on the operation and power delivery from those coal fired power plants.

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.