Australian Daily Electrical Power Generation Data – Sunday 29th September 2019 – Plus Weekly And Rolling Totals

Posted on Mon 09/30/2019 by

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By Anton Lang ~

UPDATE – The site where I take this data from had another of those infrequent glitches again for this Sunday, and some of the images and the data was not able to be made available. As I have mentioned before on the very few occasions this has happened previously, (just three times only in this past 12 Months) some of the data which is unavailable is only minor in nature, and makes no real difference to the overall picture for the total generated power, and at such a small percentage for the one which does add up (those smaller Other sources) then, in that case I use the average for the year, so any impact on the overall is only in the realm of hundredths of a percentage point, so virtually not much at all…..TonyfromOz.

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 29th 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 – 16830MW (4.00AM)

Daily Peak Power Consumption – 23390MW (6.45PM)

Daily Minimum Generated Power – 17500MW (4.00AM)

Daily Maximum Generated Power – 24000MW (6.45PM)

Average Total Power Generation – 19600MW

Total Power Generation In GWH – 470.4GWH

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 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 – 11530MW

Daily Peak Coal Fired – 15470MW

Average Coal Fired Generation – 13440MW

Total Generated Power – 322.56GWH

Average Percentage Of Total – 68.57%

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 – 970MW

Daily Peak – 4220MW

Average Natural Gas Fired Generation – 2180MW

Total Generated Power – 52.32GWH

Average Percentage Of Total – 11.12%

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 – MW

Daily Peak – MW

Average Renewable Generation – 3460MW

Total Generated Power – 83.04GWH

Average Percentage Of Total – 17.66%

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 – 520MW

Total Generated Power – 12.48GWH

Average Percentage Of Total – 2.65%

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 – 560MW

Daily Peak – 2710MW

Average Hydro Generation – 1300MW

Total Generated Power – 31.2GWH

Average Percentage Of Total – 6.63%

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 – 950MW (12.10AM)

Daily Peak – 1970MW (4.25PM)

Average Wind Generation – 1520MW

Total Generated Power – 36.48GWH

Average Percentage Of Total – 7.76%

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 – 2120MW

Average Solar Plant Generation for hours of generation – 1280MW (6.00AM till 6.30PM)

Average Solar Plant Generation across the whole 24 hour day – 640MW

Total Generated Power – 15.36GWH

Average Percentage Of Total across the whole 24 hour day – 3.27%

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 – 4970MW

Average For Hours of Generation – 2600MW (6.00AM till 6.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1290MW

Total Generated Power – 30.96GWH

Average Percentage Of Total across the whole 24 hour day – 6.58%

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 – MW

Average Across the whole day – 2160MW

Total Generated Power – 51.84GWH

Average Percentage of Total across the whole 24 hour day – 11.03%

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 –  MW –   %

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 – MW –  %

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

This was a typical Sunday when overall power consumption is usually the lowest for the week, and this day was no different, with that consumption down by 2.8%, with the total power generation on the day coming in at 470.4GWH, at an hourly average of 19600MW, and that was 550MW lower than for the day before.

The early AM Base Load was 300MW lower at 17500MW, and also as is pretty much usual, the evening peak was a little higher, up by 600MW at the same time, 6.45PM, when it was 24000MW. Across the five States with their individual peaks at differing times, the peak in New South Wales (NSW) was 60MW higher. In Queensland, it was 160MW higher. In Victoria, it was 200MW higher. In the two States with the lowest power consumption, the peak in South Australia was actually a little lower, down by 40MW and in Tasmania, it was 100MW higher.

With that overall lower, coal fired power was also down, lower by 260MW to an hourly average of 13440MW. The range between the low for the day (wound right back in the dip between the morning and evening peaks to only 11530MW) and the high was 3940MW, and on this day, coal fired power generated a maximum of 15470MW. In Victoria, Unit 2 at the Loy Yang B plant came back on line (after only being down for three hours) at 1.30AM, and by 4AM, it was back at maximum output. Unit 4 at the Yallourn plant continued to come back on line, starting that process late on the night before, and rose to around three quarters of its maximum output and stayed there until 7PM, when it was back at its maximum. In NSW, Unit 2 at the Mt. Piper plant came back on line at 2.30PM, and rolled along at one third output till Midnight. In Queensland, the recently overhauled Unit 1 at the Stanwell plant came back on line at 10.30AM, and it was back at maximum output by Midday, after being off line for only 17 hours. There are eleven of those coal fired Units off line, six in NSW, three in Victoria, and two in Queensland.

The average for natural gas fired power was lower by 310MW. The average for those smaller Other sources was lower by 30MW, and here, as I mentioned in the UPDATE above, I have used the average for this source, as the data was unavailable, but lower as with all non coal sources, with hydro power also lower, down by 140MW. The average for those solar plants was also lower on this day, down by 50MW.

The average for wind power was higher on this day, up by 240MW to an hourly average of 1520MW, and that gave wind power a daily operational Capacity Factor of 22.68, lower than the year round average for this source.

On a day when the overall and coal fired power were both lower, coal fired power delivered 68.57% of all the generated power on the day.

*****

WEEKLY DATA For Week Fifty Two.

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

52            3559.2      2391.36     445.44      106.32       616.08         282          235.44       98.64         199.92

Percent of total       67.19%       12.51%      2.99%       17.31%        7.92%         6.61%       2.77%         5.13%.

COMMENTS for this week.

That total power generation for the week of 3559.2GWH is just 1.15% lower than it was for the week before, That is at an hourly average of 21135MW, and just consider that for a moment. 21135MW required to run the Country every hour. It’s falling slowly at the moment, because the year round average is around 23650MW. The lowest it gets down to is (the year round average of) 18000MW, so that total needs to be in place for the full 24 hours of every day, and on top of that, each day more has to be found to cover the daily rise from that 18000MW low point.

As you can see here, coal fired power delivers almost 70% of that total, not as a one off, but as the average across the day, because at that low point of 18000MW on each day, coal fired power is delivering on average 80% of that total.

Those percentages for each of the sources correlate relatively closely with what they are on that long term basis of the whole year. The percentage for renewables includes hydro power in that, so when you take that away, and all you have for renewables is the two sources most favoured, wind and solar plant power, well that total only delivers around 10%. It will rise, but only very slowly, and there’s no real chance it will ever get close to the hoped for 50% that green dreamers say will come to pass. Even when you add in rooftop solar power, it still only gets to 15%, so again, 50% seems even more problematic.

That total power for the week from wind power of 235.44GWH is close to the lowest it has been for the now increased Nameplate for wind power, and that total gave wind power a weekly operational Capacity Factor of 20.91%, almost 10% lower than the year round average for this source.

*****

ROLLING TOTALS After Week Fifty Two (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

52         198044.4  141923.28  17791.44    4547.52   33782.16    14082.72  15913.68   3785.76     8907.84

Percent of total        71.66%      8.98%        2.30%       17.06%       7.11%        8.04%       1.91%         4.50%

ROLLING TOTALS After Week Fifty Two (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

52       206952.24  141923.28  17791.44   4547.52     42690      14082.72   15913.68   3785.76      8907.84

Percent of total        68.57%      8.60%       2.20%       20.63%        6.81%        7.69%       1.83%          4.30%

COMMENTS for this week.

I have been debating with myself whether or not to continue doing this on a daily basis, now that I have what I set out to do, with 52 consecutive weeks of electrical data. It is a time consuming task, manually doing all the work. I knew it would be, but I’m glad I took that time to do it. It took me around three to four hours a day spread into two or three periods of time, and the weekly Post with all the totals and rolling totals took two hour longer, so five to six hours on each Monday. At times, it was a chore, but because I was so far into it, I couldn’t give it up.

I keep thinking to myself that I should try and keep it going, but that time commitment is just too long. And if I’m honest with myself, there are now other sites which do (almost) the same thing, only not on the manual basis I do it. They are probably a little more accurate even, although comparing what I have with what is at those other sites shows my work to be pretty much right on the totals that they have. In fact, they actually show coal fired power to have a (slightly) larger percentage of overall power generation than I have after a full year. With nearly all the other sources, my totals and percentages are similar, and in fact all within one percent or so of what those other sites have. The only one which has a larger than 1% discrepancy is rooftop solar power, and the totals for that would not be accurate no matter what is said, because all of that generation is actually ‘Behind The Meter’, so it cannot be calculated with any degree of accuracy anyway.

One thing I will keep going is the data and the chart for wind power here in Australia, and mainly for one reason only, that of Capacity Factor. When looking at the data for wind power at those other sites, what I have found is that the data I have for the year for wind power’s total generated power was actually within 0.15% of what the total generated power from wind power is at that other site. However, what is not quoted at any of those other sites is that figure for Capacity Factor. Now that I do have accurate data for wind power for a year, that also includes that figure for Capacity Factor. I have that data for a year now, collected on a daily basis, and then added up for the weekly basis, and then worked out for the yearly basis. I can in fact keep those figures going. The time commitment for that will be a considerable amount of time less than for all the data and in this way I have actual proof of the data to back up what I say about Capacity Factor. The end figure for these last 52 weeks shows wind power to have an operational Capacity Factor for that full year now of 29.39%, which is all but right on the figure of 30% that I have so consistently used, and now backed up by the data itself.

By keeping this going, just for wind power, that enables me to see when new wind plants come on line, so that the new Capacity Factor can be readjusted to include that new Nameplate addition.

This has been a task that has given me a good deal of satisfaction in doing. Despite that time commitment, it has been thoroughly worthwhile to do something like this, and have it so accessible and recorded.

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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