Australian Daily Electrical Power Generation Data – Monday 12th November 2018

Posted on Tue 11/13/2018 by

2


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 12th 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 – 16940MW

Daily Peak Power Consumption – 24150MW

Daily Minimum Generated Power – 17300MW

Daily Maximum Generated Power – 24700MW

Average Total Power Generation – 21600MW

Total Power Generation In GWH – 518.4GWH

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 – 13990MW

Daily Peak Coal Fired – 17560MW

Average Coal Fired Generation – 16350MW

Total Generated Power – 392.4GWH

Average Percentage Of Total – 75.69%

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 – 580MW

Daily Peak – 2730MW

Average Natural Gas Fired Generation – 1280MW

Total Generated Power – 30.72GWH

Average Percentage Of Total – 5.93%

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 – 2500MW

Daily Peak – 4800MW

Average Renewable Generation – 3570MW

Total Generated Power – 85.68GWH

Average Percentage Of Total – 16.53%

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 – 400MW

Total Generated Power – 9.6GWH

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 – 820MW

Daily Peak – 3010MW

Average Hydro Generation – 1590MW

Total Generated Power – 38.16GWH

Average Percentage Of Total – 7.36%

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 – 960MW (3.35PM)

Daily Peak – 2040MW (8.00PM)

Average Wind Generation – 1530MW

Total Generated Power – 36.72GWH

Average Percentage Of Total – 7.09%

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 – 1240MW

Average Solar Plant Generation for hours of generation – 840MW (5.30AM till 6.30PM)

Average Solar Plant Generation across the whole 24 hour day – 450MW

Total Generated Power – 10.8GWH

Average Percentage Of Total across the whole 24 hour day – 2.08%

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 – 3930MW

Average For Hours of Generation – 2260MW (5.30AM till 7.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1270MW

Total Generated Power – 30.48GWH

Average Percentage Of Total across the whole 24 hour day – 5.88%

Notes

  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

As is usual for the first working day of the week, after the lows of the weekend, power consumption rose considerably, and from that, the overall power generation was also way up. On this day, the hourly average across the whole day was 21600MW, higher than yesterday by a substantial 2400MW, an overall increase of 12.5%.

The average for coal fired power made up the largest proportion of that, up by 910MW in all, and it varied across a 3570MW range. Just before Midnight, Unit Two at the huge Bayswater plant near Muswellbrook in New South Wales came back on line after being down for some maintenance, and now there are only nine of those coal fired Units off line.

The average for natural gas fired power was higher by 600MW, and while coal fired power covered most of the morning Peak, you can see from that graph for natural gas fired power than those Units started to come on line earlier in afternoon than they usually do.

The average power delivery from those smaller Other Sources was also higher, by 110MW.

The average for hydro was also higher, by 290MW, and the power delivery from those solar plants, albeit only 2% of the power requirements, was also higher, today by 20MW.

The average for wind power was also higher as well, by 470MW, and it varied across a range of 1080MW. That average of 1530MW gave wind power a daily operational Capacity Factor of 28%, just lower than its normal average.

On a day when overall power generation rose by such a large margin, it’s easy to see where all that rise is accounted for, as coal fired power again delivered almost 76% of all the power needs.

*****

It has been mentioned to me sometimes that the State of South Australia can be used as a blueprint for how rooftop solar power is bringing down the power requirements for power from dedicated power plants in that State and how this example in that State can be used as a guide as to what might happen in those other States. The problem I have with that is that this State, whilst still a large State in area, is in fact one of the smallest power consumers in the broad spectrum of power consumption and power generation when all the States in this vast coverage area are taken into consideration. That’s not because the consumers in that State are more frugal with their power consumption, but it is because that State has a small population, hence a much smaller power consumption.

As a State I have always mentioned that South Australia only consumes around 6.2% of all the power being consumed across the whole of this coverage area. The three main States for power consumption re New South Wales, Queensland, and Victoria, and in all, those three States consume almost 90% of all the power.

So for the sake of an exercise, I went and checked it out (again) and collected the data and the images for overall power consumption in just that State of South Australia.

Those images are as follows below, and as with all images in this Post, if you click on the image, it will open on a new page and at a larger size so you can better see the detail.

The image at the left shows the total power being generated in all the five States of this coverage area. The black line across the top shows the total power, and that is the same as for the first image at the top of the Post. As you can see for the ticked boxes in the ‘Legend’ shown under the graph, the States are shown with their corresponding colours, and the State of South Australia is shown here as the green colour, third from the top.

The second graph (the one in the centre) shows just the power being generated in that same State of South Australia, here larger in size because of the use of a different scale for the left side of the graph, total power in GW. (GigaWatts).

The third graph, the image at the right is the one which shows it at best, the green colour for the state of South Australia, isolated so just that one State is shown, and then compared to the overall total of the black line.

So, then, next I totalled up the power generated in just that State, and that averaged out to 1270MW per hour across the whole day.

Next I added up the total power generated from rooftop solar power across the same day, and that came to an average of 150MW across the day.

This gave me an overall average power generation of 1420MW across the day

Then I did the same exercise for the whole of the five States, and that gave me an average power generation of 22870MW. (21600MW generated power from power plants plus the 1270MW from rooftop solar power)

That means that this State of South Australia is generating 6.21% of the power across Australia, and here, power generation equates to power consumption.

So, while rooftop solar power may be having a slight effect in that State, but only during the middle of the day, it cannot be assumed that the same will happen across the rest of Australia.

Victoria currently generates almost double the rooftop solar power of South Australia, New South Wales almost three times a much, and Queensland, far and away the largest generator of rooftop solar power in the Country generates almost four to five times as much as South Australia.

It’s all due to scale.

It’s an easier thing to say that South Australia is doing better with its rooftop solar power than the other States, but when it is happening at such a low base, then the effect it may be having is exaggerated because of that low base for overall power generation.

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.

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