Australian Daily Electrical Power Generation Data – Sunday 26th May 2019 – Plus Weekly And Rolling Totals

Posted on Mon 05/27/2019 by

2


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 26th May 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 – 16680MW (4.05AM)

Daily Peak Power Consumption – 24300MW (6.05PM)

Daily Minimum Generated Power – 17300MW (4.05AM)

Daily Maximum Generated Power – 25500MW (6.05PM)

Average Total Power Generation – 20900MW

Total Power Generation In GWH – 501.6GWH

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 – 12740MW

Daily Peak Coal Fired – 16790MW

Average Coal Fired Generation – 14740MW

Total Generated Power – 353.76GWH

Average Percentage Of Total – 70.53%

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 – 2230MW

Average Natural Gas Fired Generation – 910MW

Total Generated Power – 21.84GWH

Average Percentage Of Total – 4.35%

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 – 3500MW

Daily Peak – 6800MW

Average Renewable Generation – 4900MW

Total Generated Power – 117.6GWH

Average Percentage Of Total – 23.45%

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 – 350MW

Total Generated Power – 8.4GWH

Average Percentage Of Total – 1.67%

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 – 920MW

Daily Peak – 3080MW

Average Hydro Generation – 1450MW

Total Generated Power – 34.8GWH

Average Percentage Of Total – 5.94%

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

The total Nameplate for all these wind plants is 6106MW.

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 – 2390MW (4.25AM)

Daily Peak – 3820MW (5.10PM)

Average Wind Generation – 3110MW

Total Generated Power – 74.64GWH

Average Percentage Of Total – 14.88%

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 35 solar plants is 2549MW.

Daily Minimum – Zero

Daily Peak – 1490MW

Average Solar Plant Generation for hours of generation – 740MW (7.00AM till 5.30PM)

Average Solar Plant Generation across the whole 24 hour day – 340MW

Total Generated Power – 8.16GWH

Average Percentage Of Total across the whole 24 hour day – 1.63%

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 – 3260MW

Average For Hours of Generation – 1470MW (6.30AM till 6.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 700MW

Total Generated Power – 16.8GWH

Average Percentage Of Total across the whole 24 hour day – 3.35%

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 – 5100MW

Average Across the whole day – 3450MW

Total Generated Power – 82.8GWH

Average Percentage of Total across the whole 24 hour day – 16.51%

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 –  5100MW – 11.40AM – 26.15%

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 – 3700MW – 6.05PM – 14.51%

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

Again, and typical for the weekend, overall power consumption and power generation were way lower than normal working week and school days, and on this day, it was the same as for the day before, as was overall power generation, at the same total it was for the day before, a total power generation of 501.6GWH, at an hourly average of 20900MW.

Now, while the overall was the same, each of the indicators did change. That early AM Base Load was lower by 200MW, and the evening peak, at the same time as the day before, 6.05PM, was in fact a large 1300MW higher. So what did change here was that for the hours between these two main points in time, power consumption was a lot less, and that’s also typical for a Sunday as well. In the five States with their peaks at differing times, the peak in New South Wales (NSW) was 320MW higher. In Queensland, it was 170MW higher. In Victoria, it was 420MW higher. In the two States with the lowest power consumption, the peak in South Australia was 100MW higher, and in Tasmania, it was also 100MW higher.

While that overall was the same, each source generated differing amounts of power than they did the day before.

The average for coal fired power was 350MW lower, down to an hourly average of 14740MW, and the maximum power generated by coal fired Units was 16790MW, and on both of these weekend days, the low for coal fired power was a lot lower, as less power was required across the day. The range between the low for the day and the high on this day was 4050MW, not high because the maximum was higher, (16790MW on this day) but because the low on the day was lower than usual, again, fairly typical for weekends. In NSW, Unit 1 at the Mt. Piper plant came back on line just after Midday, and slowly began to rise, and by 7PM, it was back close to two thirds of its maximum, and it stayed there as the technicians kept a good eye on its performance, after a long down time for maintenance, and possible Upgrade of elements in the whole process. There are now ten of those coal fired Units off line. In Queensland, Unit 2 at the Tarong plant went off line at 3.30PM, and then came back on line at 8PM, rising back to its maximum by 10PM.

The average for natural gas fired power was again well down, and you can see from the graph, that very little extra power as required across most of the day, and even when it was required for that evening peak, it was a lot lower than for normal week days.The average was just 910MW, around the lowest I have seen it, and that was down on the day before’s low level by 90MW. The average for those smaller Other sources was also lower on this day, down by 100MW. The average for hydro power was lower by 90MW, and the average for solar plant power was slightly higher, up by 30MW.

The average for wind power was well up, the best day of this week so far, again with some irony, as the overall was so much lower. That average for wind power was higher by 600MW to an hourly average of 3110MW, and that gave wind power a daily operational Capacity Factor of 50.93%, and that’s 20% higher than the year round average. It feels somewhat incongruous to say that wind power had a great day, when it still only delivers just half of its total Nameplate.

On a day when coal fired power was lower, even though the overall was unchanged, coal fired power still delivered 70.53% of all the power requirements across the Country.

*****

WEEKLY DATA For Week Thirty Four.

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

34             3723.6    2632.32     304.32       98.16         688.8         309.84        320.4       58.56           123.12

Percent of total        70.69%      8.17%        2.64%       18.50%        8.32%        8.61%       1.57%          3.31%.

COMMENTS for this week.

Overall power generation for this week, 3723.6GWH was virtually the same as what it was for the week before, and that total gives an hourly average of 22154MW. The lowest average for the week was on both weekend days at 20900MW, and the highest was on Monday at 22850MW, and that’s a difference of 8.5%.

The lowest early AM Base Load for the week was 17300MW on the Sunday, and the highest Base Load was 18200MW. Something worth mentioning here is that while coal fired power delivers between 73% (all power plant power) and 70% (with rooftop solar power included) of all the power requirement across the full 24 hour day coal fired power delivers a tick over 80% of all that power requirement at that early AM Base Load. That’s not just for one day or so, but the average across the full year, and that relates back to my Series on the Base Load I completed late last year, and that was calculated using the figures taken every day for the full year, and it was at that average of 80% plus after those 365 days of the full year. The peaks for this week were lowest on Saturday at 24200MW and highest on Monday at 26700MW.

That total power delivered from coal fired power for this week of 2632.32GWH was a little lower than last week, and that is at an hourly average of 15658MW, and for the week that was just under 71% of all the generated power from every power plant source. The highest range for the week was 4050MW on Sunday, and the maximum power generated by all coal fired power for this week was 17800MW on Tuesday. This week, there were between eight and eleven of those coal fired Units off line.

Power generation from natural gas fired power and those smaller Other sources was similar to last week, one slightly down, the other slightly up. The average for hydro power was up this week, by more than is usual, and with the hours of generation lessening, both versions of solar power were lower.

Wind power had two days around the average, two days low, one day hugely low, and one day high, and one day hugely high, and even that big day for the week was still only at 50% of Nameplate. So, all up. for the whole week, that total generated power from wind power came in at an operational Capacity Factor for the week of 31.23%, barely up by just a marginal amount on the year round average of 30%, again further accentuating the variability of wind power and how it cannot be relied upon for stable levels of power at virtually any time.

While last week was slightly higher than usual for coal fired power, this week it was back to its average of around 70% of every generated Watt of power required to run the Country.

*****

ROLLING TOTALS After Week Thirty Four (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

34        127443.6  94090.56   10893.36    2673.12    19786.56    8042.16    9358.56    2385.84      6326.76

Percent of total        73.83%      8.55%       2.10%        15.52%        6.31%        7.34%       1.87%          4.96%

ROLLING TOTALS After Week Thirty Four (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

34        133770.36  94090.56  10893.36   2673.12    26113.32     8042.16    9358.56   2385.84       6326.76

Percent of total        70.34%      8.14%       2.00%        19.52%         6.01%       7.00%       1.78%          4.73%

COMMENTS for this week.

As you might expect, with now 34 weeks of data, those percentages vary very little with each passing week.

That total for all generated power from power plants, (127443.6GWH) gives an average power generation per hour of 22311MW.

If there are things which have surprised me from taking this data on a daily basis, and keeping those Rolling Totals is the fact that of the generated power from those three renewables is still stubbornly stuck at 15%, and even when you add on the total for rooftop solar power, it also is stubbornly stuck at below 20%, and with almost nine Months of data now, that is not going to change by any appreciable percentage.

What has also surprised me is the fact that after 34 weeks, the operational Capacity Factor for wind power is stuck between 26% and 27%, and that also won’t change by much. Most wind plants at the proposal stage are in nearly every case quoted as being able to deliver their power at a Capacity Factor of 38%, and in virtually every case, they never reach that percentage over time, and even that figure of 30% now looks to be high. The percentage for this week, after a better week for wind power only rose by a tenth of a percentage point or so, and is now, after those 34 weeks, at 26.33%

Coal fired powwer still delivers just higher than 73% of all power plant power, and when you add on rooftop solar power, it’s still at just above 70% of all power being consumed across 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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