Australian Daily Electrical Power Generation Data – Tuesday 13th November 2018

Posted on Wed 11/14/2018 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 13th November 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 – 17830MW

Daily Peak Power Consumption – 24350MW

Daily Minimum Generated Power – 18000MW

Daily Maximum Generated Power – 24900MW

Average Total Power Generation – 22200MW

Total Power Generation In GWH – 532.8GWH

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 – 14940MW

Daily Peak Coal Fired – 17530MW

Average Coal Fired Generation – 16590MW

Total Generated Power – 398.16GWH

Average Percentage Of Total – 74.73%

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 – 790MW

Daily Peak – 2950MW

Average Natural Gas Fired Generation – 1890MW

Total Generated Power – 45.36GWH

Average Percentage Of Total – 8.51%

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 – 2000MW

Daily Peak – 4800MW

Average Renewable Generation – 3310MW

Total Generated Power – 79.44GWH

Average Percentage Of Total – 14.91%

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 – 410MW

Total Generated Power – 9.84GWH

Average Percentage Of Total – 1.85%

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 – 830MW

Daily Peak – 3000MW

Average Hydro Generation – 1640MW

Total Generated Power – 39.36GWH

Average Percentage Of Total – 7.39%

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 – 730MW (11.40PM)

Daily Peak – 1890MW (2.45PM)

Average Wind Generation – 1310MW

Total Generated Power – 31.44GWH

Average Percentage Of Total – 5.90%

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 – 950MW

Average Solar Plant Generation for hours of generation – 670MW (5.30AM till 6.30PM)

Average Solar Plant Generation across the whole 24 hour day – 360MW

Total Generated Power – 8.64GWH

Average Percentage Of Total across the whole 24 hour day – 1.62%

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 – 2070MW (5.30AM till 7.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1160MW

Total Generated Power – 27.84GWH

Average Percentage Of Total across the whole 24 hour day – 5.23%


  1. Finding Averages – On each 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. 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 same addition of hourly time points and then divided by the same number of those time points of actual generation.
  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

On this day, power generation rose again to cover increased power consumption. The hourly average was higher by 600MW at 22200MW, and that’s an increase of 2.7%, and with Summer approaching, that hourly average will begin increasing.

The average for coal fired power was also higher to cover that overall increase, and it was up by 240MW, a little less than half that overall increase. There was something I missed from yesterday’s Post, so I’ll rectify that here. I mentioned that just prior to Midnight, the Unit that was off line at Bayswater came back online. What I missed at that time was that as that Unit was coming back on line, one of the Units at the Mt. Piper plant was going off line, almost simultaneously, as Baysater started to come back, Mt. Piper was turned off, so careful is the scheduling in matters like this. That still leaves ten of those Units off line.

One thing of note here is what happened with that Bayswater plant. It is now 33 years old, so in fact, it has already been delivering power for longer than the expected life span for any renewable plant, both wind or solar, which are hoped to last 25 years best case scenario.

The Unit which was off line took ten hours to run back up to full power delivery as the maintenance engineers watched it to see all was going okay. From 10AM onwards, all four Units at the plant were delivering their power at or near maximum for the remainder of the day. Those four Units are 660MW units, so the plant is capable of delivering 2640MW, which is the original specification for the plant when it was new. For those remaining 14 hours after that Unit reached its full power output, the plant as a whole, all four Units averaged a power delivery of around 2550MW and that’s around 96% of that original spec, and at one time there, all four Units totalled out at 2631MW and that 99.6% of that original specification.

As to those other power generating sources, the average for natural gas fired power was higher by 640MW, as more of those fast responding plants were called upon mid afternoon and early evening to cope with the evening Peak.

The average for Hydro was up slightly, by 50MW, and those smaller Other sources were also up, by 10MW.

The average for solar plant power was down by 90MW with overcast and rain around most of those plants.

The average for wind power was down by 220MW to an hourly power delivery of 1310MW, giving wind power a daily operational Capacity Factor of 24%.

On a day when power consumption and generation rose, it is still an indicator as to where most of that power is actually sourced, and that’s coal fired power, again delivering almost three quarters of all 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.