Australian Daily Electrical Power Generation Data – Sunday 17th February 2019 – Plus Weekly And Rolling Totals

Posted on Mon 02/18/2019 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 some of the images. That scale (the total power shown on the left hand axis) has been changed to show the graph at a larger size.

Sunday 17th February 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 – 18040MW (4.00AM)

Daily Peak Power Consumption – 26200MW (5.25PM)

Daily Minimum Generated Power – 18200MW

Daily Maximum Generated Power – 26500MW

Average Total Power Generation – 21800MW

Total Power Generation In GWH – 523.2GWH

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 – 15660MW

Daily Peak Coal Fired – 19430MW

Average Coal Fired Generation – 17240MW

Total Generated Power – 413.76GWH

Average Percentage Of Total – 79.08%

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 – 3980MW

Average Natural Gas Fired Generation – 1810MW

Total Generated Power – 43.44GWH

Average Percentage Of Total – 8.30%

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 – 1600MW

Daily Peak – 3500MW

Average Renewable Generation – 2370MW

Total Generated Power – 56.88GWH

Average Percentage Of Total – 10.88%

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 – 380MW

Total Generated Power – 9.12GWH

Average Percentage Of Total – 1.74%

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 – 740MW

Daily Peak – 2220MW

Average Hydro Generation – 1130MW

Total Generated Power – 27.12GWH

Average Percentage Of Total – 5.19%

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 5661MW.

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 – 230MW (10.45AM)

Daily Peak – 1230MW (11.20PM)

Average Wind Generation – 690MW

Total Generated Power – 16.56GWH

Average Percentage Of Total – 3.17%

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 29 solar plants is 2241MW.

Daily Minimum – Zero

Daily Peak – 1490MW

Average Solar Plant Generation for hours of generation – 980MW (6.00AM till 7.30PM)

Average Solar Plant Generation across the whole 24 hour day – 550MW

Total Generated Power – 13.2GWH

Average Percentage Of Total across the whole 24 hour day – 2.52%

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 – 4130MW

Average For Hours of Generation – 2310MW (6.00AM till 7.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1300MW

Total Generated Power – 31.2GWH

Average Percentage Of Total across the whole 24 hour day – 5.96%

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 – 2000MW

Average Across the whole day – 1240MW

Total Generated Power – 29.76GWH

Average Percentage of Total across the whole 24 hour day – 5.69%

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 –  2000MW – 2.40PM – 8.77%

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 – 1000MW – 5.25PM – 3.77%

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 weekend day, usually the day of lowest power consumption for the week, actual power consumption rose slightly, as did power generation. The minimum power consumption and generation for the day was at the one point in time, at 4AM, where it dipped just slightly for ten minutes to a level 100MW lower than for the day before. The peak power consumption (and power generation) was a little later in the evening and higher than the day before by a fairly large amount (for a weekend anyway) of 2400MW, and that could have been due to an all round hotter day, as the individual peaks in each State at their respective times for their peaks were basically all higher. In New South Wales that peak was 1400MW higher. In both Queensland and Victoria, they were both 400MW higher, and it was even higher in South Australia, albeit the second smallest consumer by State in the Country. The average power generation from every source was 550MW higher to an hourly average of 21800MW.

The average for coal fired power was higher by 380MW to an average of 17240, and the range from low to high was 3770MW. There was no change in any of those coal fired Units and there are still four of them off line.

The average for natural gas fired power was 300MW higher, and as you can see from the graph, all of that was at the peak time for the day. The average for those smaller Other sources was 60MW higher, and the average for hydro power was a small 20MW higher.

Both of the renewables (power plant) were lower on the day, with solar plant power down  by the smallest margin, 10MW. Wind power, after being so low yesterday was even lower today. down by 200MW to an average of only 690MW, and that’s from a total Nameplate of 5661MW, so that gave wind power a daily operational Capacity Factor of only 12.19%, which is pitiful really. Wind power delivered only 3.17% of the power required in Australia across this whole day. Again, note the low point at 10.45AM, where wind was only delivering 230MW (at a CF of 4%, so only four out of every hundred wind towers was actually rotating at that time) and that 230MW came in at just 1.15% of the total generated power at that same time.

On a day when power generation rose, coal fired power delivered (again, as it did the day before) just slightly less than 80% of all the generated power across the whole day.

*****

WEEKLY DATA For Week Twenty.

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

20           3838.8      2865.6       364.08      65.04        544.08        175.44       276.72      91.92           219.36

Percent of total       74.65%       9.49%       1.69%        14.17%         4.57%        7.21%      2.39%          5.71%.

COMMENTS for this week.

Overall power generation for this week was slightly lower than it was for the week before, down by 1.8%, and because of that, all sources were slightly lower, except for both versions of solar power, which were slightly up at their best time of the year for power generation.

The highest minimum power generation at that low point for the day around 3 to 4AM each morning (the Base Load) was 19400MW and that was on Wednesday morning. The highest peak for the week was on the Tuesday, and that was 29700MW. The highest average for the week was 24600MW, also on the Tuesday, and the lowest average was on Saturday when it was 21250MW, a full 13.6% lower.

The average for coal fired power was only lower by just under 1%, so in fact its percentage of the overall went up by half a percent. There were between three and five Units off line during this week. The highest power generation from coal fired power for the week was 17420MW on Wednesday.

Note something here about percentages, and how sometimes they can be misleading when it comes to small overall percentages. See that average there for solar plant power of 2.39%. That’s the highest it has been since I began taking records, and that’s understandable because this is mid Summer, when the Sun is in the sky for longer during the day, and also higher in the sky as well, almost directly overhead in fact, so solar insolation is at its highest. Now, while that solar plant percentage came in at 2.39%, that total power generated of 91.92GWH was 39% higher than last week.

Hydro power was slightly higher on the week as well raising its percentage by 0.2%.

The big loser on the week was wind power, and despite a monster day on Tuesday when it ran at a Capacity Factor on the day of almost 60%, double the year round average, there were three average and slightly above average days, but three really poor days to end the week, so wind power was well down on the week, losing a full percent and more on last weeks average for the week. That total power delivered by wind power for this week gave wind power a weekly operational Capacity Factor of 29.1%, so you can see how bad days and good days even out to close on that yearly average.

For a week when the overall total power generation was lower, coal fired power delivered almost three quarters of all the power for the week, for 24 hours of every day.

*****

ROLLING TOTALS After Week Twenty (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

20            75402       55896       6125.76     1599.12     11781.12     5022.24    5364.48    1394.4       4062.84

Percent of total        74.13%      8.13%        2.12%        15.62%        6.66%         7.11%       1.85%           5.39%

ROLLING TOTALS After Week Twenty (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

20           79464.84   55896       6125.76    1599.12    15843.96    5022.24    5364.48    1394.4       4062.84

Percent of total        70.34%       7.71%       2.01%      19.94%        6.32%        6.75%       1.76%         5.11%

COMMENTS for this week.

That total generated power in that first rolling total for just the power plant totals equates to an hourly average for these 20 weeks of 23650MW.

Now at week 20, those percentages do not change all that much, and while some did not change at all, others changed by the smallest amount, barely a hundredth or two of a percent with the biggest change coming from the natural gas fired sector. While natural gas fired power was lower this week, it’s weekly average for this week was still well higher than the rolling average, so the percentage of the total delivered from natural gas fired power rose by almost half of one percent, far and away the largest change, and that has been steadily rising for each of the last 6 or 7 weeks.

The total for all of those renewables on that second rolling total has fallen lower than 20%, and that’s up and down, despite solar power being good, mainly tempered by the fact that if wind power is up, then hydro power is lower, evening out the total for all renewables.

That total power generated across 20 weeks for wind power gives wind power an operational Capacity Factor for the 20 weeks of 28.2%, just a tick under that year round average of 30%.

The percentage of the total delivered from coal fired power is again slowly rising, and steady above 70% with every source of power generation, including rooftop solar power added to the overall total.

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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