Australian Daily Electrical Power Generation Data – Sunday 6th January 2019 – Plus Weekly And Rolling Totals

Posted on Tue 01/08/2019 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 6th January 2019

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 – 17420MW (5.35AM)

Daily Peak Power Consumption – 22420MW(6.15PM)

Daily Minimum Generated Power – 17900MW

Daily Maximum Generated Power – 22800MW

Average Total Power Generation – 20300MW

Total Power Generation In GWH – 487.2GWH

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 – 15000MW

Daily Peak Coal Fired – 18310MW

Average Coal Fired Generation – 16220MW

Total Generated Power – 389.28GWH

Average Percentage Of Total – 79.90%

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 – 990MW

Daily Peak – 1410MW

Average Natural Gas Fired Generation – 1140MW

Total Generated Power – 27.36GWH

Average Percentage Of Total – 5.62%

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 – 1400MW

Daily Peak – 3600MW

Average Renewable Generation – 2570MW

Total Generated Power – 61.68GWH

Average Percentage Of Total – 12.66%

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 – 370MW

Total Generated Power – 8.88GWH

Average Percentage Of Total – 1.82%

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 main 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 – 560MW

Daily Peak – 1140MW

Average Hydro Generation – 800MW

Total Generated Power – 19.2GWH

Average Percentage Of Total – 3.94%

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 – 660MW (7.05AM)

Daily Peak – 2060MW (8.10PM)

Average Wind Generation – 1230MW

Total Generated Power – 29.52GWH

Average Percentage Of Total – 6.06%

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 area you can just see in that top image.

The total Nameplate for all these 29 solar plants is 2021MW.

Daily Minimum – Zero

Daily Peak – 1360MW

Average Solar Plant Generation for hours of generation – 920MW (5.30AM till 7.30PM)

Average Solar Plant Generation across the whole 24 hour day – 540MW

Total Generated Power – 12.96GWH

Average Percentage Of Total across the whole 24 hour day – 2.66%

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 – 3940MW

Average For Hours of Generation – 1990MW (5.00AM till 8.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1240MW

Total Generated Power – 29.76GWH

Average Percentage Of Total across the whole 24 hour day – 6.11%

Wind And Solar Power Generation Versus Total Power Generation

This image shows the total power generated from all the wind plants, and all the solar power plants in this coverage area, combined in the one image, and compares it to the overall total generated power, the black line at the top of the graph. Wind power is the green coloured area, and solar plant power is the red coloured area, and these are the same as shown in those other coloured images at the top of the Post.

I have also added the total generated power for both wind and solar plant power combined, and the percentage of the overall total below for the maximum power from both sources with respect to the overall total, both at the maximum for both, and then for the total for both at the daily peak Power time.

Daily Peak for Wind and Solar Plant Power – 2600MW

Average Across the whole day – 1770MW

Total Generated Power – 42.48GWH

Average Percentage of Total across the whole 24 hour day – 8.72%

Total Generated power at the daily maximum for both wind and solar plant power, the time of that maximum, and percentage of the total at that daily maximum –  2600MW – 5.30PM – 11.66%

Total Generated power for wind and solar plant power at Peak Power Consumption time for the day, and percentage of total at that daily Peak Power time – 2400MW – 6.15PM – 10.53%

Notes

  1. Finding Averages – On each (non solar) 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.
  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. Every so often, as the days get longer (or shorter after Summer) I change the hours of generation as those hours change.
  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 Sunday, power consumption dropped again, after yesterday’s fall. It was down by a further 1700MW to an hourly average of 20300MW, and after yesterdays 12.4% fall, today’s fall added a further 7.7% onto that.

All sources of power generation fell on this day, except for both versions of solar power, slightly higher on the day. The average for coal fired power was lower by quite a significant margin, down by 980MW to an average of 16220MW. In Queensland one of those six Units at the old Gladstone plant, Unit 3 went off line at Midnight and fell back to zero output by 3AM. There are now 6 of those coal fired Units off line.

The average for natural gas fired power was down by 150MW. The average for those smaller Other sources was lower by 30MW. The average for hydro power was lower by 30MM. The average for solar plant power was higher by quite a lot considering, up by 120MW, but the caution required here is that this source of power generation still only delivers 2.66% of the required power, even on a day when solar plant power is higher and the overall is significantly lower.

The average for wind power was lower on the day, down by a large amount, 630MW, to an hourly average of 1230MW, giving wind power a daily operational Capacity factor of 22.55%.

On the day of the week with lowest power consumption, and even with coal fired power lower by almost 1000MW, coal fired power still delivered just under 80% of all the required power.

*****

WEEKLY DATA For Week Fourteen.

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

14           3784.8      2932.8        259.2         63.6           529.2          197.52       248.16      83.52           233.4

Percent of total       77.49%       6.85%       1.68%        13.98%        5.22%        6.56%      2.20%          6.17%

COMMENTS for this week.

Overall total power generation from every source was 4.3% higher this week, the typical rise in Consumption as Summer advances.

The total power generated from coal fired sources was also higher on the week, up by the same 4.3% as the overall. That’s also an expected thing as actual consumption rises, hence the need for more power, and the safest and most reliable source for all that is from coal fired power as more Units are on line delivering those large amounts of power.

The largest percentage rise was in that natural gas fired sector, where the total generated power was 45% higher, and that is also natural, because more power is required at that peak power time late in the afternoon and into the early evening, when that Peak rises considerably, and power plants which can actually deliver power as and when it is required can be called on to start up quickly and deliver large amounts of power as required.

Something similar also applies with those smaller Other sources, which can also be called upon to augment power at those peak power times.

Hydro was well down on the week, with 22% lower total power generated, and that caused a fall in the overall power delivered from all renewable sources, lower on this week by 7.3%.

Both versions of solar power were marginally higher on the week even at a time when their output is traditionally increasing, again showing the disadvantage of these versions of power generation which rely on the Sun, and are subject to the vagaries of overcast and heavy cloud cover when it is raining, which drives down their potential power generation by large amounts.

The total power generated by wind power was slightly higher this week, but not by any significant percentage. Even so, because the overall was higher by a large amount and with coal fired power also higher, then the percentage supplied by wind power actually fell when compared to the week before. That total power delivered from wind power gave wind an operational Capacity Factor for the week of 27%.

In a week when the overall total power generation was so much higher, coal fired power’s percentage rose, delivering almost 78% of all the required power for the week.

*****

ROLLING TOTALS After Week Fourteen (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

14            50838     38155.68    3431.52     979.92      8270.88      3593.04    3733.68   944.16         2753.4

Percent of total        75.05%      6.75%        1.93%       16.27%        7.07%         7.34%       1.86%           5.42%

ROLLING TOTALS After Week Fourteen (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

14           53591.4   38155.68     3431.52     979.92     11024.28     3593.04     3733.68     944.16        2753.4

Percent of total        71.20%       6.40%       1.83%        20.57%      6.70%         6.97%        1.76%         5.14%

COMMENTS for this week.

In a week where the overall rose, those Rolling Totals varied very little. As coal fired power was higher then its percentage was also higher, but most other sources of power generation remained remarkably similar to what they were the week before, some percentages not even changing at all. From now on, those percentages of the overall will change so marginally as to almost unchanged from the week before.

You can see here from that second Rolling Total, where rooftop solar power is added onto the  total for all renewable power, it still only delivers 20% of all power. It is a difficult thing to get that total higher by any significant margin, and with most States now promising 50% f all power to come from renewables, that is a statement that comes out of the mouths of politicians so easily, and yet is so problematic to actually achieve. Consider that renewables include hydro, so take that out of the renewables total and you are left with a little less than 14%. To raise that to at least the 50% promised, that means what is currently in place being multiplied by three, and to actually achieve it would necessitate the closure of quite a vast swathe of coal fired power, and that is something that would not happen if the actual consumed power is to remain the same or even rise with further population increases.

The total power generated from wind power gives wind power an operational Capacity Factor for these last 14 weeks of 29.12%, a little lower than the year round average.

Note also on that second Rolling Total that coal fired power is up beyond 71% of all the required 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.

OzPowerGenerationTFO

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