Australian Daily Electrical Power Generation Data – Monday 4th June 2018

Posted on Tue 06/05/2018 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 4th June 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 – 18540MW

Daily Peak Power Consumption – 28680

Daily Minimum Generated Power -18800MW

Daily Maximum Generated Power – 29200MW

Average Total Power Generation – 23600MW

Total Power Generation In GWH – 566.4GWH

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 – 15800MW

Daily Peak Coal Fired – 18300MW

Average Coal Fired Generation – 17300MW

Total Generated Power – 415.2GWH

Average Percentage Of Total – 73.3%

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 – 1150MW

Daily Peak – 5400MW

Average Natural Gas Fired Generation – 2760MW

Total Generated Power – 66.24GWH

Average Percentage Of Total – 11.69%

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 -1800MW

Daily Peak – 5300MW

Average Renewable Generation – 3540MW

Total Generated Power – 84.96GWH

Average Percentage Of Total – 15%

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 – 5350MW

Average Hydro Generation – 3070MW

Total Generated Power – 73.68GWH

Average Percentage Of Total – 13.01%

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 – 100MW

Daily Peak – 710MW

Average Wind Generation – 360MW

Total Generated Power – 8.64GWH

Average Percentage Of Total – 1.53%

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 – 450MW

Average Solar Plant Generation for hours of generation – 280MW (7.30AM till 5.30PM)

Average Solar Plant Generation across the whole 24 hour day – 110MW

Total Generated Power – 2.64GWH

Average Percentage Of Total across the whole 24 hour day– 0.47%

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 – 3100MW

Average For Hours of Generation – 1970MW (7AM till 5.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 860MW

Total Generated Power – 20.64GWH

Average Percentage Of Total across the whole 24 hour day – 3.64%


  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.
  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.

Comments For This Day

This was the first day of the working week, and power consumption, and power generation, rose considerably, over what it was on yesterday, Sunday.

The minimum power consumption (the 4AM Base Load) was up by 500MW, and at the Peak power consumption time at 5.30/6PM, it was 2340MW higher, and that’s a substantial increase of 8%. As a result, power generation at both those times also increased, as did the average power generation across the whole 24 hours, and that average was 1600MW higher, more than 7% over the typical weekend day’s power generation.

The average power generation from coal fired power marginally increased by 100MW, again indicating that no matter what, those coal fired Units will deliver what they always are delivering. With respect to coal fired power it was an interesting thing to see the totals from the State of Victoria for this day. There are only 10 Units now in Victoria, and for the last few weeks, Unit One at the Yallourn W plant in Gippsland has been off line. At 4.30AM, they started the slow procedure to wind it back up to full power after such a long time being off. As it slowly started to wind up, and almost simultaneously, Unit 3 at that same power plant started to wind back to zero. Now that the (ancient) plat at Hazelwood, has closed in that State, taking 1600MW out of the system in that State forever, those remaining ten Units are running at their maximum all the time they are on. In the other two States where there is coal fired power, their Units, in their totality, ramp up and down closely following the Load, (actual power consumption) but In Victoria, now strapped a little more for large amounts of power, those remaining Units deliver at their maximum all the time they are on, probably making maintenance that little more difficult to schedule. Across this whole vast coverage area, eight of those coal fired Units are off line.

The bulk of the increase in overall power generation was in the natural gas fired generation and hydro generation sectors, and there was a reason for that. Wind power generation increased marginally by 30MW over the previous day’s very low total, and solar generation was the same as for the previous day.

Those increases in the averages for natural gas fired generation (+590MW) and Hydro generation (+880MW) were indeed substantial, and that was most evident at the Peak power time in the evening. Natural gas fired generation at that time was 1150MW higher and Hydro generation was 1100MW higher than for the previous day, and that needs some explanation.

In the case of natural gas fired generation, refer to the wind power graph there and note how wind power was so low, and the largest concentration of wind plants is in the State of South Australia. So without much wind power in that State, then the only other source of power generation is from natural gas fired sources, so natural gas fired power rose considerably in that State, adding further to the normal rise in natural gas fired power in the three larger States.

In the case of Hydro generation, most of that is in the Island State of Tasmania, where there is the largest concentration of hydro power. Tasmania only makes up around 5% of the total power consumption of this vast coverage area, and at the moment their main source of extra power is the Interconnector across Bass Strait into the Mainland State of Victoria, (and that State’s coal fired power generation) and that Interconnector has been out of action for a couple of Months now, so they have no access to extra power when it is needed the most, so in what is now the beginning of Winter, virtually their only source of power is their many hydro plants, so hydro power rose in Tasmania adding to the normal rise in the three Mainland States.

The wind power generation average was only 30MW higher than for the exceedingly low average for the previous day, and for this day it was only 360MW, and that amounted to only one and a half percent of what was actually required for the day. That 360MW is at a Capacity Factor of a little under 7%, again, another pitiful result really. The low point for wind power was 100MW, and at the same time it was that low, just around the morning peak, that amounted to only one third of one percent of what was being consumed. That low wind generation was due, again, to that large High Pressure weather system hovering over the area where there are the largest concentration of those wind plants. That might change tomorrow as a very deep Low Pressure system is coming behind that High, and the isobar gradient between them indicates high wind during the time it passes over those wind plants, but that also has a drawback as well, because if the wind is too strong, those turbines are automatically shut down and the blades feathered so that very high wind does not damage them.

Now, look closely at the graphs and note that they all seem to show a similar ‘sized’ image, but, as I mentioned right at the start of this Series, the scale is changed for the smaller sources of power generation to show them better, and that was the main reason I included that fourth image from the top, showing the total power (the top black line) with respect to the total delivered from the three sources of renewable power, hydro,wind and solar power. The sub total (the lower black line) indicates that renewable total, and here, note how closely it follows the line for hydro power. (the orange line just below the black line)

Overall, all renewables contributed only 15% to the total power being required, but hydro power made up nearly all of that. When you add together the totals for wind power and solar power, the amount contributed from BOTH of them combined was only 2% of the power needed to run the Country, and that was for the whole day, all 24 hours.

If we are to have a future where coal fired power is phased out for these two renewables of choice (because there’s little if any chance of any new major dams with hydro power as part of them) then it looks like we have a bleak future ahead of us if there are days like this, and now we have had two of them in succession, not just solitary points in time, but now, two whole days.

Coal fired power might have a bad reputation, (continually enhanced by people with a green agenda, who have little idea of what is actually required) but you only need look at ths data to see that coal fired power is actually essential.

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.