Australian Daily Electrical Power Generation Data – Sunday 21st October 2018 – Plus Weekly And Rolling Totals

Posted on Mon 10/22/2018 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.

Sunday 1st October 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 – 16700MW

Daily Peak Power Consumption – 21940MW

Daily Minimum Generated Power – 16900MW

Daily Maximum Generated Power – 22300MW

Average Total Power Generation – 19300MW

Total Power Generation In GWH – 463.2GWH

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 – 14400MW

Daily Peak Coal Fired – 17200MW

Average Coal Fired Generation – 15680MW

Total Generated Power – 376.32GWH

Average Percentage Of Total – 81.25%

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 – 660MW

Daily Peak – 2370MW

Average Natural Gas Fired Generation – 1060MW

Total Generated Power – 25.44GWH

Average Percentage Of Total – 5.49%

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 – 1500MW

Daily Peak – 3000MW

Average Renewable Generation – 2270MW

Total Generated Power – 54.48GWH

Average Percentage Of Total – 11.76%

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 – 290MW

Total Generated Power – 6.96GWH

Average Percentage Of Total – 1.50%

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 – 840MW

Daily Peak – 2550MW

Average Hydro Generation – 1370MW

Total Generated Power – 32.88GWH

Average Percentage Of Total – 7.1%

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 5421MW.

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 – 240MW (4.45PM)

Daily Peak – 1110MW (2.45AM)

Average Wind Generation – 510MW

Total Generated Power – 12.24GWH

Average Percentage Of Total – 2.64%

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 25 solar plants is 1820MW.

Daily Minimum – Zero

Daily Peak – 1010MW

Average Solar Plant Generation for hours of generation – 760MW (6.00AM till 6.30PM)

Average Solar Plant Generation across the whole 24 hour day – 390MW

Total Generated Power – 9.36GWH

Average Percentage Of Total across the whole 24 hour day – 2.02%

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 – 3440MW

Average For Hours of Generation – 1840MW (5.30AM till 7.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1030MW

Total Generated Power – 24.72GWH

Average Percentage Of Total across the whole 24 hour day – 5.34%

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

This was the Sunday of the weekend, and power consumption and generation figures were similar to what they were on the Saturday, with the average power generation just 100MW lower per hour than for the day before, and as is always the case, the mix of power delivery from the different sources varied wildly again.

I have mentioned a couple of times now about the scale change of the graphs so that they fit neatly onto the page, and if you get used to just looking at those graphs, you could get the impression that they are similar from day to day. Again, for this day, I would again highlight that change of scale when it comes to some of those graphs.

Look at the graph for wind power, and again it goes from a high near the top of the ‘page’ showing the graph, to a low close to the bottom. However, the scale has been changed here, because on this day, wind power was very low, as you can see from the data alongside that graph, so to highlight it showing that scale change to its best effect, I’ll show you the graph for wind power versus the total generated power for this day, and that’s the image at the right here, and again, if you click on this image (as with any of these images) it will open on a new page and at a larger size. The total generated power is the black line showing the Load Curve for all power generation across the top of the graph, and wind power is the green coloured area you can see just bumping along the bottom of that graph.

The average for wind power across the day was only 510MW per hour, giving it a daily operational Capacity Factor of only 9.4%, so less than one in ten of those thousands of wind towers across the Country were delivering power on this day, and wind only delivered 2.6% of the power required during this day. Note also that at the low point for wind power at quarter to five, just as power consumption was beginning to ramp up towards the evening Peak, wind was only delivering 240MW of that, or 1.16% of what was actually required at that time.

The average for power generation was higher on the day, and on a day when overall power generation fell by 100MW, that average for coal fired power rose by a significant 1190MW. One of those Units down for maintenance came back on line during the afternoon, and now there are nine Units off line. Because coal fired power was way up on the day, and with wind power down by so much, the averages for natural gas fired power and hydro power were the same as what they were for the day before.

The average for solar power was up as well, but hey, when it id only delivering 2% of what is required, who really cares, as it is all but inconsequential.

And also, if those other sources are touted as being so cheap, why then did they use more coal fired power on this day than for any other day this last week or more, as coal fired power delivered a whopping 81.25% of all the generated power across the Country.

*****

WEEKLY DATA For Week Three.

Notes For Weekly and Rolling Totals

  1. Here, the Overall is 100%, so Coal + Natural Gas (NG) + Other + Renewable adds up to that 100%
  2. Hydro, Wind and Solar add up to the total for Renewable.
  3. For the first Rolling Total, Rooftop Solar Power (which is behind the meter) is a percentage of the overall total and on top of that total.
  4. For the second Rolling Total, Rooftop Solar Power is added to the total overall power generation, and new percentages are calculated from that new overall total.
  5. Total Generated Power is expressed here as GWH (GigaWattHours) and a GWH is a MWH (MegaWattHour) multiplied by 1000.

WEEKLY TOTALS (In GWH)

Week       Total          Coal            NG           Other        Renew        Hydro        Wind        Solar        Rooftop Solar

Three       3523.2      2583.6       247.44        57.6         634.56        266.16        318           50.4           151.2

Percent of total       73.33%         7.02%       1.64%       18.01%       7.55%        9.03%      1.43%         4.20%

COMMENTS for this week.

The total power generation for this week was a little lower than for the previous week, but only by 1.4%, and while remarkably similar, the mix of power delivered from the different sources changed, as you might expect.

The total power delivered by coal fired power was down by 3.5%, and the main reason for that is that those coal fired plants are taking this opportunity of (expected for this time of year) lower power consumption to schedule maintenance for their Units before the ramping up of consumption in the coming Summer. To that end, there wer between 9 and 12 Units off line for the whole of the week, and that takes almost one quarter of all coal fired power out of the system.

While the average for renewable power changed very little, again, the mix changed. Wind power had a good week the week before this one, and this week was only just average, and with hydro up slightly, and solar power up a little as Summer approaches, then that average for renewable showed only a minor change.

The total power delivered from wind power gave wind an operational Capacity Factor for the week of just under 35%, still a little higher than the year round average of 30%.

Even with so many Units off line, coal fired power still delivered over 73% of all the power required.

*****

ROLLING TOTALS After Week Three (In GWH) (Just power generation from power plants with rooftop solar behind the meter)

For these totals, Coal + NG + Other + Renewable = 100%. Hydro + Wind + Solar = Renewable Percentage

Week       Total          Coal            NG           Other        Renew        Hydro        Wind        Solar        Rooftop Solar

Three      10599.6      7972.8      641.76       178.08      1806.96       751.44       917.76      137.76         471.12

Percent of total         75.22%       6.05%        1.68%        17.05%       7.09%       8.66%       1.3%          4.44%

ROLLING TOTALS After Week Three (In GWH) (With rooftop solar added to the renewable total, and the overall total, and new percentages calculated from that new overall total)

For these totals, Coal + NG + Other + Renewable = 100%. Hydro + Wind + Solar + Rooftop Solar = Renewable Percentage

Week       Total          Coal            NG           Other        Renew        Hydro        Wind        Solar        Rooftop Solar

Three      11070.72     7972.8       641.76       178.08     2278.08      751.44      917.76      137.76         471.12

Percent of total         72.02%        5.79%        1.61%       20.58%       6.79%       8.29%      1.24%          4.26%

COMMENTS for this week.

These Rolling Totals are showing signs of settling down, even after only three weeks, and the changes are only in the tenths of a percent margin now.

Both versions of solar power are slightly increasing with each week now, but note here that they are still only delivering very small percentages of the total, with the power delivered from those solar plants still only just higher than one percent of what is required.

That total power delivered from wind power gives wind an operational Capacity Factor after three weeks of 33.5%.

Coal fired power is still averaging 72% of all the required power to run the Country.

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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