Australian Daily Electrical Power Generation Data – Sunday 18th August 2019 – Plus Weekly And Rolling Totals

Posted on Mon 08/19/2019 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 all of the images, and that even though they look similar in size of generation, that scale (the total power shown on the left hand vertical axis) has been changed to show the graph at a larger size to better fit the image for that graph.

Sunday 18th August 2019

Total Power Generation All Sources

Here, the total power generation from every power plant source is the top of the load curve, with each colour indicating a source of power generation. 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. The other colours mixed in with the rest of them are from those smaller Other sources. 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 – 17950MW (4.50AM)

Daily Peak Power Consumption – 24960MW (6.45PM)

Daily Minimum Generated Power – 18500MW (4.50AM)

Daily Maximum Generated Power – 26200MW (6.45PM)

Average Total Power Generation – 21300MW

Total Power Generation In GWH – 511.2GWH

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 for all three colours, the grey, dark yellow and purple colours combined in the image directly above.

The black line just under that top black line is the Sub Total just for coal fired power, and that is the same as the combined colours of the grey and ark yellow on the image above. 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 – 12220MW

Daily Peak Coal Fired – 17400MW

Average Coal Fired Generation – 14940MW

Total Generated Power – 358.56GWH

Average Percentage Of Total – 70.14%

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 – 390MW

Daily Peak – 2280MW

Average Natural Gas Fired Generation – 890MW

Total Generated Power – 21.36GWH

Average Percentage Of Total – 4.18%

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 the three 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) and those smaller Other sources 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 (that black line, which also includes RTS as well) 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 – 4100MW

Daily Peak – 6600MW

Average Renewable Generation – 5200MW

Total Generated Power – 124.8GWH

Average Percentage Of Total – 24.41%

Generation From Other Sources

This image shows the power being generated from the 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 – 270MW

Total Generated Power – 6.48GWH

Average Percentage Of Total – 1.27%

Hydro Power Generation

This image shows all Hydro power generation. It is the same as the blue colour 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 – 910MW

Daily Peak – 2730MW

Average Hydro Generation – 1320MW

Total Generated Power – 31.68GWH

Average Percentage Of Total – 6.20%

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 green coloured line in the image at the top showing generation from all sources.

The total Nameplate for all these wind plants is 6702MW, from a total of 55 wind plants.

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 in Winter and earlier during the Summer Months.)

Daily Minimum – 2070MW (10.10AM)

Daily Peak – 4160MW (10.40PM)

Average Wind Generation – 3360MW

Total Generated Power – 80.64GWH

Average Percentage Of Total – 15.77%

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 41 solar plants is 3075MW.

Daily Minimum – Zero

Daily Peak – 1810MW

Average Solar Plant Generation for hours of generation – 1140MW (6.30AM till 6.00PM)

Average Solar Plant Generation across the whole 24 hour day – 520MW

Total Generated Power – 12.48GWH

Average Percentage Of Total across the whole 24 hour day – 2.44%

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 8000MW and higher, and that is a large total. However, that total equates to almost 2 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 is only consumed in the local residential areas. While seemingly still high this total is spread across that huge number of installations across the whole of this coverage area.

Daily Minimum – Zero

Daily Peak – 4090MW

Average For Hours of Generation – 2060MW (6.30AM till 6.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 940MW

Total Generated Power – 22.56GWH

Average Percentage Of Total across the whole 24 hour day – 4.41%

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, which also includes RTS as well. 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 data below for 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 – 5400MW

Average Across the whole day – 3880MW

Total Generated Power – 93.12GWH

Average Percentage of Total across the whole 24 hour day – 18.21%

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 –  5400MW – 2.50PM – 26.47%

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 – 3900MW – 6.45PM – 14.89%

Overall Total With Rooftop Solar Power Added

This image shows the overall total generated power with Rooftop Solar Power (RTS) added to the total from all of the power plants. RTS is shown here as that orange colour added near the top of the graph in the middle, during daylight hours, and is indicated on the legend below the graph as Rooftop PV (PhotoVoltaics). The new overall total is that black line along the top of the Load Curve. Note here that with this RTS total added, the shape of the full load curve, the black line now looks almost exactly as Summer load curves used to look prior to the advent of RTS, and all those panels on roofs of private dwellings.

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

As is usual for this day, the second day of the weekend, overall power consumption is considerably lower than it is on week days, and on this day that power consumption was the same as it was for the day before, and the total power consumption also the same as well, and the only change was in the mix of power generation from the diferent sources. That total power generation was 511.2GWH, at an hourly average of 21300MW.

The early AM Base Load was a little later in the morning at 4.50AM, and it was only 100MW lower than it was on the day before, but then, at that usual time of 4.00AM, it was the same as for the day before. The evening peak at around the normal time of 6.45PM was 1100MW higher. Across the five States with their individual peaks at differing times, the peak in New South Wales (NSW) despite that overall peak being higher was actually 110MW lower in this, the largest power consuming State in the Country. In Queensland, the peak there was 200MW higher. In Victoria, it was also 200MW higher. The largest increase was in one of the two smallest power consuming States in the Country, in South Australia, where the peak there was a very large 500MW higher, and that’s a lot for such a small power consuming State. In Tasmania, it was 40MW higher.

All power generating sources were lower on the day, barring the one which goes up and down on a daily basis, wind power, and on this day it was up.

The average for coal fired power was 750MW lower, as coal fired power eased back during the time period between the morning and the evening peak, when power consumption, on a Sunday is traditionally much lower than for any other day. That average for coal fired power was 14940MW, ans with this source easing back as it did, when it did, then the range between the low for the day and the high was a lot larger than usual, and it was in fact quite large a range at 5180MW, showing that coal fired power can indeed follow the Load by varying its output across time, and here that was around one third of its average. On this day, coal fired power generated a maximum of 17400MW, and that was around the time of the evening peak, also showing that coal fired power can ramp right up when it is needed the most, during those evening peaks each and every evening. In Queensland, Unit 4 at the old Gladstone plant came back on line at 5.30AM, and by 11AM was back near full power output. There are seven of those coal fired Units off line, three in Queensland, and two each in NSW and Victoria.

As you can see from the graph for natural gas fired power, it was hardly needed at all during this day, and it was lower by 670MW to an average of just 890MW. The average for those smaller Other sources was also a lot lower, down by 90MW to an average of just 270MW. The average for hydro power was also down on this day, lower by 140MW. The average for solar plant power was also lower on the day, down by 60MW.

As you may have guessed by now, that average for wind power was right up again, more than double what it was the day before, higher by 1710MW to an hourly average of 3360MW, and that gave wind power a daily operational Capacity Factor of 50.13%, well more than the year round average of 30%.

On a day traditionally lower in power consumption, coal fired power delivered 70.14% of all the generated power.

*****

WEEKLY DATA For Week Forty Six.

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

46             3978      2687.32      402.48       110.88       777.6          325.32       356.64      95.76          169.68

Percent of total       67.55%      10.12%       2.78%       19.55%        8.18%        8.96%      2.41%          4.27%.

COMMENTS for this week.

That total power generated for this week is at an hourly average of 23678MW. It is a slight drop of 1.6% over the total generated power last week, and the reason for the drop is that the two weekend days, Saturday and Sunday of this week were such low power generation days, both days an average 2000MW/Hour lower than the Saturday and the Sunday the week before.

The total power generated from the coal fired source was slightly higher this week, even with between eight and ten of those coal fired Units off line during this week.

Natural Gas fired power was higher this week, as was the power delivered from those smaller Other sources, with two days this week seeing those Other sources with the largest daily average power generation for the year. Hydro power was also slightly higher, and with the days becoming longer now Mid Winter has passed, then both versions of solar power generation were also slightly higher.

Wind power again had another of those weeks when it was up one day, and then down the next. There were two really big days, one above average day, two days a little lower than the average, one day not much better than half the average and one day with a pitiful result, and evening it all out across the week, the weekly operational Capacity Factor came in at 31.67%, just a tick higher than the year round average of 30%.

That total generated power for coal fired power comes in at an hourly average of 15936MW, and this week, that meant that coal fired power delivered just a tiny bit more than two thirds of every watt of power being consumed across this vast coverage area, 67.55% of all the generated power.

*****

ROLLING TOTALS After Week Forty Six (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

46          175750.8   127138.32 15374.88  3943.68   29293.92    12344.16   13751.04    3198.72      7776.48

Percent of total        72.34%      8.75%       2.24%       16.67%        7.02%        7.83%       1.82%          4.43%

ROLLING TOTALS After Week Forty Six (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

46        183527.28 127138.32 15374.88    3943.68    37070.4    12344.16   13751.04   3198.72      7776.48

Percent of total        69.27%     8.38%       2.15%        20.20%        6.73%       7.49%       1.74%          4.24%

COMMENTS for this week.

Again, these Rolling Totals show very little change after what is now 46 weeks. That total generated power from just the power plants comes in at an average of 22742MW per hour, and the coal fired component of that comes in at 16451MW per hour.

as is usual in the Winter Months the coal fired percentage falls marginally, as is happening, and most other sources rise ever so slightly, as is happening with natural gas fired power, those smaller Other sources, and also hydro power.

Wind power is still incrementally increasing mainly because that Nameplate has increased across the year, be it ever so slightly an increase in percentage, mainly in the hundredths of a percentage point. On an overall basis, wind power has an operational Capacity Factor (CF) after these 46 weeks of 29.05%, and that’s just a little lower than the year round average for this source of a CF of 30%.

Because of that ever so slight rise for all the renewables, the overall percentage for all renewables has steadily increased, also only incrementally, and is now solidly above that 20% figure, albeit by just two tenths of a percent.

Note that even with every source included, coal fired power is still just under 70% of all generated 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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