Australian Daily Electrical Power Generation Data – Sunday 24th March 2019 – Plus Weekly And Rolling Totals

Posted on Mon 03/25/2019 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 24th March 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 – 17300MW (3.55AM)

Daily Peak Power Consumption – 25600MW (5.15PM)

Daily Minimum Generated Power – 17400MW

Daily Maximum Generated Power – 26400MW

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 – 14810MW

Daily Peak Coal Fired – 18340MW

Average Coal Fired Generation – 16550MW

Total Generated Power – 397.2GWH

Average Percentage Of Total – 75.92%

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 – 760MW

Daily Peak – 3020MW

Average Natural Gas Fired Generation – 1630MW

Total Generated Power – 39.12GWH

Average Percentage Of Total – 7.48%

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 – 1100MW

Daily Peak – 5300MW

Average Renewable Generation – 3340MW

Total Generated Power – 80.16GWH

Average Percentage Of Total – 15.32%

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 – 280MW

Total Generated Power – 6.72GWH

Average Percentage Of Total – 1.28%

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 – 1970MW

Average Hydro Generation – 950MW

Total Generated Power – 22.8GWH

Average Percentage Of Total – 4.36%

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 – 460MW (6.25AM)

Daily Peak – 3880MW (10.55PM)

Average Wind Generation – 2110MW

Total Generated Power – 50.64GWH

Average Percentage Of Total – 9.68%

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 2532MW.

Daily Minimum – Zero

Daily Peak – 1150MW

Average Solar Plant Generation for hours of generation – 540MW (6.30AM till 7.00PM)

Average Solar Plant Generation across the whole 24 hour day – 280MW

Total Generated Power – 6.72GWH

Average Percentage Of Total across the whole 24 hour day – 1.28%

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 – 4220MW

Average For Hours of Generation – 1970MW (6.00AM till 7.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1070MW

Total Generated Power – 25.68GWH

Average Percentage Of Total across the whole 24 hour day – 4.91%

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 – 3900MW

Average Across the whole day – 2390MW

Total Generated Power – 57.36GWH

Average Percentage of Total across the whole 24 hour day – 10.96%

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 –  3900MW – 1.10PM – 17.18%

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 – 3300MW – 5.15PM – 12.5%

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 day, as is usual for weekend days, power consumption and generation was way lower than on week days, and this day, it was lower than for the Saturday, down to an hourly average of 21800MW, a small 50MW lower in fact.

The early AM Base load was 800MW lower, and the evening peak was 100MW higher. Most of the drop is as it always is on weekends, the time between the daily low and for the next five hours or so, when, on weekends, there is a much smaller morning peak, and later in time than on week days. In those individual five States, with their peaks at differing times, the peak in the largest consuming State, New South Wales (NSW) their peak was 600MW higher than for the day before. In Queensland, it was 500MW higher. In Victoria, it was 400MW lower. In the two smallest consuming States, the peak in South Australia was 200MW lower, and it was all but the same in Tasmania as it was on the day before.

Even though that overall was lower, the average for coal fired power was higher on the day, up to an hourly average of 16550MW, and that was 80MW higher than it was on the day before.The range between the low on the day, and the high at around that peak power time was 3530MW, virtually the same as it was on the day before, the Saturday. In NSW, Unit 2 at the Mt. Piper plant came back on line between 11AM and 5PM.  There are seven of those coal fired Units off line, three in NSW, and two each in Queensland and Victoria.

The average for natural gas fired power was a lot lower than for the day before, when it fell by a large amount, and on this day, it fell a further 420MW to an hourly average of 1630MW. The average for those smaller Other sources also was well down, lower on this day by 130MW. The average for hydro power was also down, lower by 140MW. With heavy overcast at some of those solar power plants, that source was lower by 50MW to an average of only 280MW, meaning it was only supplying 1.28% of all the power needed across the Country.

With the overall down on this day, it was a little ironic that wind power had its best day for the week. After a morning when it was quite low, wind power rose significantly across the afternoon and into the evening and at one stage it was delivering almost 3900MW of its 5661MW Nameplate, meaning that at that time of maximum power generation, it was operating at almost 70% of its total. Because it did have such a good time period of generation, that raised its overall average for the day to 2110MW, higher on this day by a pretty substantial 610MW, and that average of 2110MW gave wind power a daily operational Capacity Factor of 37.27%. However, note again, that even when wind power is high, it has no effect at all on coal fired power, and the only sources it did have an effect on were natural gas fired power, hydro power and to a lesser extent those smaller Other sources.

On a day when the overall was lower, and coal fired power slightly higher, coal fired power delivered almost 76% of all the required power across the whole day.

*****

WEEKLY DATA For Week Twenty Five.

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

25            3849.6     2863.92     407.04       87.84        490.8         197.52        230.88      62.4           174.96

Percent of total       74.40%       10.57%      2.28%       12.75%        5.13%         6.00%      1.62%          4.55%.

COMMENTS for this week.

This week saw a slight rise in overall power consumption, and from that, power generation, with the total power generation for the week from every source at that figure of almost 3.85TWH, a rise for the week of 1.81%.

The highest Base Load (the early AM minimum power consumption) was 19200MW on the Friday. The highest peak for the week was 26900MW ad that was on two days, the Thursday and the Friday. The highest average power generation for the week was 23800MW and that was on the Thursday.

The total power delivered from coal fired power was also slightly higher than for the week before. The highest total power at any one point in time for coal fired power for the week was on the Monday when it got to a high of 18780MW at around the time of the evening peak. The highest average for power generation from coal fired power was 17800MW on the Wednesday. This week, as we now move into Autumn, and away from the Months of highest power needs, more of those coal fired Units take the time to roll back their individual Units in rotation for maintenance, and this week there were between six and nine Units off line, which is a change from the Summer just passed when sometimes there were only two Units off line.

There were slight falls in totals for natural gas fired power, and those smaller other sources. Hydro power was slightly higher for the week, and with Summer now passed, those two sources of solar power, from power plants and rooftop solar power were both lower for this week.

Wind power had a great day on the Sunday, well, on the Sunday afternoon anyway, and even then the average Capacity Factor for the day was only a little higher than the year round average. That was the only day it was higher than that year round average, and wind power had two very low days where it only manged half its yearly average. That weekly total power delivered from wind power (230.88GWH) gave wind power a weekly operational Capacity Factor of 24.7%

With coal fired power higher on the week, that meant that that coal fired source delivered 74.4% of all power requirements for the week.

*****

ROLLING TOTALS After Week Twenty Five (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

25          94784.4    70193.04    8194.08    2029.2     14368.08     5936.64    6649.92    1781.52      5022.12

Percent of total        74.06%      8.64%        2.14%        15.16%       6.26%         7.02%       1.88%         5.30%

ROLLING TOTALS After Week Twenty Five (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

25         99806.52   70193.04    8194.08    2029.2     19390.2     5936.64    6649.92    1781.52      5022.12

Percent of total        70.33%       8.21%      2.03%       19.43%         5.95%       6.66%       1.79%         5.03%

COMMENTS for this week.

With the totals for this week just passed only slightly higher, most sources saw very little change to their Rolling Totals, and that’s to be expected after what is now almost half the year of data recording. On those first Rolling Total figures there, which just detail the power generated from power plants, coal fired power was slightly higher this week, as was natural gas fired power. All of the renewable sources were down slightly, and that took the overall percentage for renewable power (15.16%) lower on the week.

The same happened with the second set of Rolling Totals, with coal fired power and natural gas fired power both up, and all four renewables slightly lower, with the overall percentage of 19.43% for all renewables, including rooftop solar power dropping further from that 20% mark it was at barely 8 weeks back now.

That total power delivered from wind power of 6649.92GWH gives wind power an operational Capacity Factor for these 25 weeks of 28.47%, and it has fallen slightly with each of the past few weeks, now stubbornly under that 30% year round average.

That percentage total power delivered from coal fired power (70.33%) is sneaking up a few hundredths each week, now solidly above 70%, and staying there.

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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