Australian Daily Electrical Power Generation Data – Tuesday 19th June 2018

Posted on Wed 06/20/2018 by

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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 19th 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 – 19790MW

Daily Peak Power Consumption – 31320MW

Daily Minimum Generated Power – 20100MW

Daily Maximum Generated Power – 32200MW

Average Total Power Generation – 25500MW

Total Power Generation In GWH – 612GWH

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 – 16400MW

Daily Peak Coal Fired – 19700MW

Average Coal Fired Generation – 18500MW

Total Generated Power – 444GWH

Average Percentage Of Total – 72.55%

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 – 950MW

Daily Peak – 5400MW

Average Natural Gas Fired Generation – 2200MW

Total Generated Power – 52.8GWH

Average Percentage Of Total – 8.63%

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 – 2750MW

Daily Peak – 6650MW

Average Renewable Generation – 4800MW

Total Generated Power – 115.2GWH

Average Percentage Of Total – 18.82%

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 – 1700MW

Daily Peak – 5750MW

Average Hydro Generation – 3570MW

Total Generated Power – 85.68GWH

Average Percentage Of Total – 14%

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 – 590MW

Daily Peak – 1740MW

Average Wind Generation – 1130MW

Total Generated Power – 27.12GWH

Average Percentage Of Total – 4.43%

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 – 420MW

Average Solar Plant Generation for hours of generation – 250MW (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– 0.39%

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 – 3600MW

Average For Hours of Generation – 2290MW (7.30AM till 5.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 950MW

Total Generated Power – 22.8GWH

Average Percentage Of Total across the whole 24 hour day – 3.73%

Notes

  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

It was another cold working week day, and power consumption and generation was high again.

Of most note here is that minimum power consumption figure for this day, and while the year round average is 18000MW, on this morning at 4AM, it was 19790MW, and that’s 1240MW higher than for yesterday. The peak power consumption at 5.30/6PM was only 240MW higher, and power generation was higher to reflect those rises, most notably at 4AM, and at that time coal fired power was 1100MW higher, so it seems that when extra power is required for an increase in consumption, coal fired power is the go-to source for that. The average power generation of 25500MW across the whole day was 300MW higher than for yesterday.

Note on that top image there how the shape of the Load Curve for ALL fossil fuels (the blue line) follows the Load Curve for total power generation (the top black line) closely, with the two peaks and the dip in the middle.

Now go to the second image, That top black line is the same as the blue line on the first image. The black line immediately under that top black line is the Load Curve for just coal fired power alone. Note here how while it has the two peaks, that dip between them is not as pronounced, close to an almost flat line. This indicates that coal fired power generation stayed high during the day. That gap between the two black lines is the power delivered from the other fossil fuelled source, natural gas fired power, and that is shown at the third image down. It also has those two peaks as well, more pronounced here because of the change in scale. (the left hand side of the graph, indicating power in MW)

The average power generation for coal fired power of 18500MW was 300MW higher than for the day before, and that rise fully covers the rise in the overall average for all power generation sources.

The average for natural gas fired power was 100MW lower, and that fall was covered by hydro, which was an average of 40MW higher and wind power which was an average of 60MW higher, with solar power remaining the same as for the day before, albeit only 100MW in total for solar power, barely 0.4% of all power being generated.

Again wind power was low at the peak power time, delivering only 850MW when 32200MW was required, so wind was delivering only 2.6% of what was needed at that time. That average of 1130MW across the day for wind power is at a Capacity Factor of 21.6%.

Again we see that when ‘real’ power in large amounts is needed, the one source that comes to the fore is coal fired power, and just look at this for a moment.

At that time of peak power consumption coal fired power was generating 19700MW. The total Nameplate for all 48 Units at the 16 power plants is 23000MW. Four of those Units are currently offline, and because of that, it takes the current operational Nameplate down to 21000MW. So, coal fired power was generating 19700MW in total, from that existing Nameplate of 21000MW. So, coal fired power was delivering its power at a Capacity Factor at that time of 93.8%. Wind power was delivering its power at that same time at a Capacity Factor of 16.3%.

At that time of peak power consumption, coal fired power was delivering 23 times more than wind power, supplying 62% of the total needed, and wind power was delivering 2.6% of that same total of 32000MW.

It seems coal fired power is more important than it is given credit for.

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.

OzPowerGenerationTFO

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