Australian Daily Electrical Power Generation Data – Sunday 1st September 2019 – Plus Weekly And Rolling Totals

Posted on Mon 09/02/2019 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 1st September 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 – 17540MW (4.30AM)

Daily Peak Power Consumption – 24100MW (6.45PM)

Daily Minimum Generated Power – 18100MW (4.30AM)

Daily Maximum Generated Power – 24700MW (6.45PM)

Average Total Power Generation – 20700MW

Total Power Generation In GWH – 496.8GWH

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 dark 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 – 11160MW

Daily Peak Coal Fired – 16110MW

Average Coal Fired Generation – 14150MW

Total Generated Power – 339.6GWH

Average Percentage Of Total – 68.36%

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 – 820MW

Daily Peak – 4160MW

Average Natural Gas Fired Generation – 1860MW

Total Generated Power – 44.64GWH

Average Percentage Of Total – 8.98%

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 – 2800MW

Daily Peak – 5600MW

Average Renewable Generation – 4200MW

Total Generated Power – 100.8GWH

Average Percentage Of Total – 20.29%

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 – 490MW

Total Generated Power – 11.76GWH

Average Percentage Of Total – 2.37%

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 – 1140MW

Daily Peak – 2800MW

Average Hydro Generation – 1600MW

Total Generated Power – 38.4GWH

Average Percentage Of Total – 7.73%

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 – 1170MW (10.15PM)

Daily Peak – 2740MW (1.40AM)

Average Wind Generation – 2070MW

Total Generated Power – 49.68GWH

Average Percentage Of Total – 10.00%

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 – 1940MW

Average Solar Plant Generation for hours of generation – 1090MW (6.30AM till 6.00PM)

Average Solar Plant Generation across the whole 24 hour day – 530MW

Total Generated Power – 12.72GWH

Average Percentage Of Total across the whole 24 hour day – 2.56%

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 – 4570MW

Average For Hours of Generation – 2380MW (6.30AM till 6.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1140MW

Total Generated Power – 27.36GWH

Average Percentage Of Total across the whole 24 hour day – 5.51%

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 – 4200MW

Average Across the whole day – 2600MW

Total Generated Power – 62.4GWH

Average Percentage of Total across the whole 24 hour day – 12.56%

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 –  4200MW – 10.45AM – 22.22%

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 – 1700MW – 6.45PM – 6.88%

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

On this Sunday, power consumption fell around 4.7%, with the total power generation for the day coming in at 496.8GWH, at an hourly average of 20700MW, and that was 1000MW lower than it was for the day before.

The early AM Base Load was the lowest for the week at 18100MW, and it was a little later, at 4.30AM, but it was 18200MW for almost an hour, with the low point sneaking just that 100MW lower. The evening peak was at around the same time, tonight at 6.45PM, but again within 100MW of that peak for forty minutes with that one point in time peak of 24700MW in the middle of that time period, and that was 500MW lower than the day before’s peak. Across the five States with their individual peaks at differing times, the peak in New South Wales (NSW) was 710MW lower, the only State where it was lower, and enough to drag the overall lower. In Queensland, it was higher by 60MW. In Victoria, it was higher by 20MW. In the two States with the lowest power consumption, the peak in South Australia was 90MW higher and in Tasmania, it was 120MW higher.

he average for coal fired power was lower than it has been for quite a while now, and it was down by 420MW to an average of 14150MW. The range between the low for the day and the high was 4950MW, and coal fired power generated a maximum on this day of 16110MW, also the lowest that maximum has been for quite a while also. However what was low was the minimum that coal fired power ramped back to in the afternoon, between the two peaks and that low was 11160MW and I really cannot recall coal fired power being so low. In Queensland, that Unit 2 at the Millmerran power plant that went off line yesterday was back on line today, coming back up at 4.30AM and in a slow increase, it was back at maximum output at 6PM. It was only off line for 26 hours in all. There are ten of those coal fired Units off line, four in NSW, and three each in Queensland and Victoria.

The average for natural gas fired power was lower by 30MW. The average for those smaller Other sources was lower by just 10MW. The average for hydro power was higher by 40MW, and the average for solar plant power was lower by 20MW.

The average for wind power was lower by a considerable 560MW, down to an hourly average of 2070, and that gave wind power a daily operational Capacity Factor of 30.89%, right on that year round average.

On a day when power consumption is usually at its lowest point, coal fired power , lower by less a percentage than the overall, delivered 68.36% of all power.

There was something of interest on this day when it came to coal fired power, and that was that it was so low at that point between the two peaks, and there’s something I would like to point out about that. Now, while coal fired power was so low at that point, the same can also be said for the overall power generation at that same point in time. This is only happening on Weekend days, both the Saturday and the Sunday, when power consumption between the morning and evening peaks is so low, and it is due solely to rooftop solar power. I never really thought I would see the day when I actually said something like that, but having said it, I went back and looked at it from a critical point of view, and saw something worth mentioning.

Now, this is something that is also happening in all States across the Country ….. BUT but but, it’s only on the weekends. Well perhaps sometimes in South Australia on some week days, but hey, that’s just 6.2% of Australia’s total power consumption, so it’s really just an outlier, as it has not happened in any of the big three States, NSW, Qld, and Vic. and it won’t happen in them either, as they are just too large consumers when compared to South Australia, and Tasmania, the smallest consumer.

In that period between those two peaks, the morning and evening peaks it is now a case where each of those States has its daily minimum power consumption at that time. However, this will only ever happen on weekend days in Winter mind you, because as soon as the warmer weather starts to kick in, the Warm weather Load Curves come back into play when HVAC kicks back in with it’s usual large rise in those warmer Months.

So then, let me show you something else here.

Note that on those weekend days, that low point for the day is lower than the normal early AM Base Load level. On this Sunday, that low point for the whole Country was 17000MW at 1.45PM, and that was actually 1100MW lower than the Base Load Minimum at around that usual 4AM time.

Now, on weekends, schools, Industry and Commerce and Business are in the main nearly all of them shut down for the weekend.

So now, go back to a normal working day, say Thursday, just two days prior to this low point on the Saturday, when schools, industry, business and commerce are all at wok, consuming their own large levels of power.

At around that same time, 1.35PM on Thursday, with schools, Industry, Commerce, and Business in full swing the power generation at that same time was 23400MW, a full 6400MW higher than for this Sunday on the weekend, and that’s a full and very large 27% higher. It’s the same on nearly every other working week day as well, as something like this low point only happens on weekends, when overall power consumption has always been 10% PLUS lower than on week days.

At that same time, 1.45PM on this Sunday, coal fired power was also at its low point for the day, and it was only generating 11160MW, the lowest it has been for quite some time, and even so, that amount being generated by coal fired power is still 65.65% of all the generated power, so even though it is at a low point like this, it is still delivering around the same average as it delivers across the whole day.

*****

WEEKLY DATA For Week Forty Eight.

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

48          3904.8     2584.32      496.56       109.68       714.24        325.68       290.16      98.4           165.12

Percent of total       66.18%      12.72%       2.81%       18.29%        8.34%        7.43%      2.52%          4.23%.

COMMENTS for this week.

Overall power generation for this week was actually a little higher than last week, up by 2.1%. That total generated power for the week is at an hourly average of 23242MW.

While that total generated power from renewables is lower this week, all of it was from the wind power sector, which had a below average week. Because of that, the averages for natural gas were well up, as was the average for the smaller niche supplier, those Other sources, and to a slightly lesser extent, hydro also up, but not by enough to keep renewables at the same percentage as they were last week.

Wind power was well down when compared to last week, and that total power generated by wind plants was 290.16GWH, and that gave wind power a weekly operational Capacity Factor of 25.77%, around 5% lower than the year round average.

That percentage for coal fired power of 66.18% for the week will be around the normal for the next eight to ten weeks in the lead up to Summer, as plants take the opportunity of falling total power consumption to crank up their maintenance times. for their Units, and even so, this Winter, there were more Units off line than for the last few Winters, and I get the impression that as these plants age, and now with less of them, these existing plants are being called on to work harder and longer, and for aging plants, that is not a good thing. We can only hope that they will still be able to deliver this Summer, or there may be some difficult times ahead.

*****

ROLLING TOTALS After Week Forty Eight (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

48           183480  132282.24  16160.64    4131.12      30906      12970.32   14538.96   3396.72      8122.56

Percent of total        72.10%      8.81%        2.25%       16.84%        7.07%        7.92%       1.85%          4.43%

ROLLING TOTALS After Week Forty Eight (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

48        191602.56 132282.24 16160.64    4131.12    39028.56   12970.32  14538.96   3396.72      8122.56

Percent of total        69.04%     8.43%        2.16%        20.37%        6.77%       7.59%       1.77%          4.24%

COMMENTS for this week.

Again, these figures vary so very little on a week to week basis. I am now getting close to a full years worth of data and that gives greater certainty as to percentages across the board.

With the Warmer Months now in front of us, you ‘ll notice that the two versions of soalr power will be rising in their percentage levels, but even while so much new solar is being put in place, those figures for the both versions of solar power are still quite low, and doing the data like this actually highlights that fact, as if we were to believe what we read from ill informed sources mainly, you’d get the distinct impression that solar power is becoming quite large and as you can see from the data now, which takes into account all of Summer, and now all of Winter as well, we have almost a full years data, and both versions of solar power still only add up to six percent of all power generation.

Wind power had a week well below average and the rolling Capacity Factor for wind power after these 48 weeks is 29.30%, virtually right on that year round average for wind power.

Coal fired power is still sitting just on that 69% mark for all power generating sources including rooftop solar 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.

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