Australian Daily Electrical Power Generation Data – Sunday 30th June 2019 – Plus Weekly And Rolling Totals

Posted on Mon 07/01/2019 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 30th June 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 – 17930MW (4.25AM)

Daily Peak Power Consumption – 26480MW (6.15PM)

Daily Minimum Generated Power – 18500MW (4.25AM)

Daily Maximum Generated Power – 27500MW (6.15PM)

Average Total Power Generation – 22050MW

Total Power Generation In GWH – 529.2GWH

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 – 13330MW

Daily Peak Coal Fired – 19160MW

Average Coal Fired Generation – 15780MW

Total Generated Power – 378.72GWH

Average Percentage Of Total – 71.57%

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 – 560MW

Daily Peak – 2280MW

Average Natural Gas Fired Generation – 900MW

Total Generated Power – 21.6GWH

Average Percentage Of Total – 4.08%

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 – 3900MW

Daily Peak – 6200MW

Average Renewable Generation – 5050MW

Total Generated Power – 121.2GWH

Average Percentage Of Total – 22.90%

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 – 320MW

Total Generated Power – 7.68GWH

Average Percentage Of Total – 1.45%

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 – 820MW

Daily Peak – 3150MW

Average Hydro Generation – 1340MW

Total Generated Power – 32.16GWH

Average Percentage Of Total – 6.08%

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 – 2730MW (7.10PM)

Daily Peak – 3910MW (12.10AM)

Average Wind Generation – 3240MW

Total Generated Power – 77.76GWH

Average Percentage Of Total – 14.69%

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 – 1750MW

Average Solar Plant Generation for hours of generation – 1080MW (7.00AM till 5.30PM)

Average Solar Plant Generation across the whole 24 hour day – 470MW

Total Generated Power – 11.28GWH

Average Percentage Of Total across the whole 24 hour day – 2.13%

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 – 3140MW

Average For Hours of Generation – 1560MW (7.00AM till 5.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 630MW

Total Generated Power – 15.12GWH

Average Percentage Of Total across the whole 24 hour day – 2.86%

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 – 3710MW

Total Generated Power – 89.04GWH

Average Percentage of Total across the whole 24 hour day – 16.82%

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 – 12.45PM – 25.50%

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 – 2900MW – 6.15PM – 10.55%

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 Sunday was the usual day of lowest power consumption for the week, and the overall power generation on this day was 529.2GWH, at an hourly average of 22050MW, lower than the day before’s average by just 250MW.

The early AM Base Load was the same as it was yesterday morning at 185000MW, and the evening peak was higher than the day before, by 900MW at 27500MW at 6.15PM. Across the five States with their individual peaks at slightly differing times, the peak in New South Wales (NSW) was 620MW higher. In Queensland, it was 40MW higher, and in Victoria, it was 190MW higher. For the two States with the lowest power consumption, the peak in South Australia was 70MW higher, and in Tasmania, it was 130MW higher.

The average for coal fired power was lower by a little more than the overall was down, and that average for coal fired power was 15780MW, down by 300MW on the average for the day before. Again, the low point for coal fired power was lower than usual, understandable for weekends with much lower power consumption, and the range between the low for the day and the high was 5830MW, and coal fired power generated a maximum on this day of 19160MW at around the same time as that evening peak. In NSW, Unit 1 at the huge Bayswater plant went off line at Midday, dropping to zero output almost immediately, and incidentally, that Unit has a Nameplate of 660MW, so half a day back at zero accounts for the 300MW loss in that average for coal fired power. There are seven of those coal fired Units off line, five in Queensland, and one each in NSW and Victoria.

The average for natural gas fired power was up by 160MW. The average for those smaller Other sources was higher by 60MW, and the average for hydro power was higher by 120MW. Solar plant power was higher on this day by a good way, up by 140MW.

The average for wind power, while still way up, was lower on this day by 430MW, down to an hourly average of 3240MW, and that gave wind power a daily operational Capacity Factor of 48.34%, still almost 20% higher than the year round average for this source of power generation.

With both the overall and coal fired power lower, coal fired power still delivered 71.56% of all the required power across Australia.

*****

WEEKLY DATA For Week Thirty Nine.

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

39            4062       2869.92     273.84        82.32        835.92        313.92      453.84       68.16           103.2

Percent of total        70.65%     6.74%         2.03%      20.58%       7.73%       11.17%       1.68%          2.54%.

COMMENTS for this week.

The overall power generation for the week was that figure of 4462GWH, and that was 3.5% lower than it was for the week before this one, and that total generated power for the week is at an hourly average (for 24 hours of seven days) of 24180MW, a fall of 870MW over last week’s average.

When it came to the daily indicators, the lowest Base Load (minimum daily power generation) for this last week was on the Saturday and Sunday when it was 18500MW, the only days lower than the next lowest of 19600MW. The highest Base Load minimum power generation for the week was on Tuesday at 20200MW, and keep in mind here that the yearly average is 18000MW. The lowest peak was on the Saturday when it was 26600MW, and the highest peak was on Monday when it reached 31900MW, the highest peak so far this Winter, and on the Tuesday, it was also above 30000MW as well, reaching a peak of 30500MW. The lowest average for the week was on Sunday when it was 22050MW, and the highest average for the week was 26300MW on Monday. That difference of between the low and the high average for the week was 19.3%, and that’s a substantial difference, highlighting the difference between working day power consumption and weekend power consumption, when it always lower.

Coal fired power delivered a little less power this week than for the week before, but while the overall power generation from every source fell by 3.5%, coal fired power was only 1.6% lower, and that total power delivered by coal fired power of 2869.92GWH was at an hourly average across the week of 17032MW, and that average was only 2% lower than last week. The highest range low to high on any given day was 5830MW on the Sunday, when power consumption was at its lowest, and the highest power generation from coal fired power for the week was 19580MW on the Wednesday and the Thursday. This week there were between six and seven of those coal fired Units off line, and the week ended with seven of them off line.

The big indicator for this week was wind power which was way up, and to highlight that variability of wind power that I have mentioned so often, after the previous week to this last one being the week of lowest power generation since I started recording this data, this last week was the highest week for wind power generation since I have stared recording this data. This most recent week, wind power almost tripled the output of the week before, and that total generation of 453.84GWH gave wind power a weekly operational Capacity Factor of 40.31%, more than 10% higher than the year round average for wind power. Note the irony here that on a week when the overall as lower than the earlier week, wind power was well higher, and in fact because that overall dropped, it gave wind power a better percentage of the total power delivered, and this week, wind power supplied almost 11.2% of all the generated power. However, note also another of those things I have been mentioning, that wind power has no effect at all on coal fired power. The percentage delivered from coal fired power was higher, even during a week when wind power is at its best for the year. The only effect wind being so high has, is that those other two sources which wind does have an effect on were both well down this week. Wind power delivered 292.2GWH more than the week before, and natural gas fired power and hydro delivered 324.7GWH less than the week before when wind was so low.

With wind power so high for the week, that of itself drove the total for all renewables higher, and this week that total was in fact almost 21% of all the generated power across the week.

Even so, the total power delivered from coal fired sources was 70.65% of all generated power for the week.

*****

ROLLING TOTALS After Week Thirty Nine (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

39         147739.2   108161.28 12699.84    3230.4    23647.68    9937.68    11040.72  2669.28      6846.48

Percent of total        73.21%      8.59%       2.19%        16.01%        6.73%        7.47%      1.81%          4.63%

ROLLING TOTALS After Week Thirty Nine (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

39       154585.68  108161.28  12699.84   3230.4     30494.16    9937.68   11040.72  2669.28      6846.48

Percent of total        69.97%     8.21%       2.09%        19.73%        6.43%       7.14%       1.73%          4.43%

COMMENTS for this week.

Again, there is very little change in thee Rolling Totals. As is usual for Winter when more power is required to cover the increase in power consumption normal for this Season, coal fired power drops marginally, and that second set of Rolling Totals sees coal fired power falling marginally below 70% of all generated power, even with the addition of rooftop solar power, because just from those power plants, coal fired power is still above 73%.

With wind power having such a large week for power generation, that percentage of power delivered by wind power showed the biggest change, and even that was only one tenth of one percent. The total for all renewables is still under that 20% mark, and that 50% promise for renewable power by 2030 is even further away.

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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