Australian Daily Electrical Power Generation Data – Sunday 31st March 2019 – Plus Weekly And Rolling Totals

Posted on Mon 04/01/2019 by

4


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 March 31st 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 – 16350MW (4.25AM)

Daily Peak Power Consumption – 22550MW (6.40PM)

Daily Minimum Generated Power – 17100MW

Daily Maximum Generated Power – 23100MW

Average Total Power Generation – 19700MW

Total Power Generation In GWH – 472.8GWH

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 – 12610MW

Daily Peak Coal Fired – 17090MW

Average Coal Fired Generation – 14600MW

Total Generated Power – 350.4GWH

Average Percentage Of Total – 74.11%

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 – 740MW

Daily Peak – 2430MW

Average Natural Gas Fired Generation – 1260MW

Total Generated Power – 30.24GWH

Average Percentage Of Total – 6.40%

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 – 1700MW

Daily Peak – 4700MW

Average Renewable Generation – 3470MW

Total Generated Power – 83.28GWH

Average Percentage Of Total – 17.61%

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 – 370MW

Total Generated Power – 8.88GWH

Average Percentage Of Total – 1.88%

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 – 460MW

Daily Peak – 2220MW

Average Hydro Generation – 1020MW

Total Generated Power – 24.48GWH

Average Percentage Of Total – 5.18%

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 – 690MW (11.20PM)

Daily Peak – 2950MW (1.00AM)

Average Wind Generation – 2020MW

Total Generated Power – 48.48GWH

Average Percentage Of Total – 10.25%

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 2562MW.

Daily Minimum – Zero

Daily Peak – 1440MW

Average Solar Plant Generation for hours of generation – 850MW (6.30AM till 6.30PM)

Average Solar Plant Generation across the whole 24 hour day – 430MW

Total Generated Power – 10.32GWH

Average Percentage Of Total across the whole 24 hour day – 2.18%

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 – 3900MW

Average For Hours of Generation – 2140MW (6.30AM till 7.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1110MW

Total Generated Power – 26.64GWH

Average Percentage Of Total across the whole 24 hour day – 5.63%

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 – 3800MW

Average Across the whole day – 3040MW

Total Generated Power – 58.8GWH

Average Percentage of Total across the whole 24 hour day – 12.43%

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 –  3800MW – 1.15PM – 21.11%

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 – 1600MW – 6.40PM – 6.93%

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 Sunday, power consumption was way down, even for a weekend day, and heralds the approach of the cooler weather of Autumn at last and the passing of those hot days when consumption is higher. The overall average for power generation was lower, following consumption down, and that figure for power generation from every source was down to 19700MW per hour, a fall of 1100MW, even after falling 1500MW the day before, also a weekend day, the Saturday. That drop on this day was a further 5.3%, and when compared to the high consumption/generation day for this week, the the Monday, that drop today comes in at 15%.

The minimum generation for this day was 17100MW, a fall of 800MW. The peak for the day, typical for a weekend coming more in the early evening that the typical late afternoon times of the warmer Months, and on this day, that peak was at 6.40PM, and it was only 100MW lower than for the day before, so the falls were all during the day, rather than in the evening. In the individual States with their peaks at differing times, in New South Wales (NSW) their peak was actually 200MW higher. In Queensland it was 200MW lower. In Victoria, it was the same as it was on the Saturday. In the two smallest consuming States, the peak in South Australia was 100MW higher, and in Tasmania, it was 50MW higher.

With that overall average so low, it was not a surprise to see coal fired power lower either, and that coal fired average was down to 14600MW, a drop of 860MW. The range between the low for the day and the high was 4480MW. In Victoria, Unit 2 at the Yallourn W plant went off line at 7AM, falling to zero output almost immediately. In Queensland, Unit 4 at the Callide plant came back on line at 12.30AM, and was back at full output by 4AM. Also in Queensland, Unit 3 at the Stanwell plant near Rockhampton went off line at 11.30AM, also dropping to zero almost immediately. There are now ten of those coal fired Units off line, four in NSW, and three each in Queensland and Victoria.

With the overall down, it was a change to see the average for natural gas fired power higher on this day by 320MW. The average for those smaller Other sources was also higher, up by 90MW. The average for hydro power was also higher on the day, up by 230MW, and the average for solar plant power was also higher by 70MW after a below average day the day before.

As you may (or may not) guess, with the averages up for natural gas fired power and hydro power, then the average for wind power was lower on the day, after a good day the day before. That average for wind power was down by a fairly large 950MW to an average of 2020MW, and even down, that average for wind power gave it a daily operational Capacity Factor of 33.03%, still slightly higher than the year round average.

Even with the averages for both the overall and also coal fired power both down by fairly large amounts, coal fired power still delivered 74.11% of all the required power.

*****

WEEKLY DATA For Week Twenty Six.

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

26            3661.2     2730.72     292.56       50.88        587.04         172.56        349.2       65.28           158.16

Percent of total       74.59%       7.99%       1.39%       16.03%         4.71%         9.54%      1.78%          4.32%.

COMMENTS for this week.

This week was one of those weeks when wind power had a good week, even though there were two days when wind power was only at half its year round average Capacity Factor There were two days when it was close to average and three very good days which raised the total output from wind power for the week. But, having said that, as is always the case with wind power, when it is high, then it is offset by the lowering of outputs from natural gas fired power and hydro power, and to a lesser extent, the smaller Other sources are also lower.

The total generated power for the week (3661.2GWH) was almost 5% lower than it was last week, and now we are in the benign low power consuming Months of Autumn, that total should be falling for the next few weeks. The highest minimum for the week, that early AM base Load was 19100MW and the highest peak for the week was 26100MW, and both of these were on the Monday, also the day of the highest hourly average for power generation, 23150MW, and the lowest average was as usual on a weekend day, the Sunday at 19700MW, a full 15% lower than for the highest average day.

When it came to coal fired power, that was also lower, but not by the same percentage as for the overall, as the percentage for coal fired power delivery was actually higher for the week. That total power delivery for coal fired power of 2730.72GWH means that the average for coal fired power for the week comes in at 16250MW per hour, every hour for the whole week. The highest range from low to high for this week was 4480MW on two days. This week the Units off line were between five and ten, and that high figure of ten should be around the average for upcoming weeks, with power consumption lower in the Autumn, and plants take this low consumption time to take Units off line for maintenance, so they can all be ready for the high power consuming Months in the approaching Winter Months.

I mentioned above that wind power was high for the week, and because of that, natural gas fired power, and hydro were lower on the week, so let me show you that. The overall percentage for wind power compared to the overall for this week was higher by 3.54%. The percentage for natural gas fired power was lower by 2.58% and the percentage for hydro power was lower by 0.42%, and the average for those smaller Other sources was lower by 0.89%. So adding together those falls for those three sources, that comes in at 3.89% and that covers the rise in the wind power percentage.

That total power delivered from wind power of 349.2GWH, was well up on last week, and that gave wind power an operational Capacity Factor of 34.04%, and that was higher than the year round average of 30%.

On a week when typically, power consumption and overall generation drops, that total power delivered from coal fired power meant that coal fired power was delivering 74.59% of all the required power for this week.

*****

ROLLING TOTALS After Week Twenty Six (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

26          98445.6    72923.76   8486.64    2080.08    14955.12     6109.2     6999.12    1846.8       5180.28

Percent of total        74.08%      8.62%        2.11%        15.19%       6.21%         7.11%       1.87%         5.26%

ROLLING TOTALS After Week Twenty Six (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

26        103625.88  72923.76   8486.64   2080.08    20135.4     6109.2      6999.12    1846.8       5180.28

Percent of total        70.37%       8.19%      2.01%        19.43%        5.90%       6.75%       1.78%         5.00%

COMMENTS for this week.

This week marks the end of week 26, so half a year has been covered. (this time around, as I had that break when we moved home, and I started all over)

With respect to that first Rolling Totals, that total generated power (98445.6GWH) means that the hourly average for all power generation from every source comes in at 22540MW.

The coal fired component of that total comes in at an average of 16700MW per hour, every hour of every day for the last 26 weeks, six Months, and as you can see, the percentage of power delivered from coal fired plants compared to all generated power from just the power plants is 74.08%, and that showed a slight rise this week.

There were falls in both solar totals and a fall in hydro power, and with wind rising due to a good week, those loses in the other three renewables offset the rise in wind power, and the total for renewables (just those power plants) was higher by only 0.02%.

For the second set of data for all power, with rooftop solar added in, the percentage for coal fired power was still slightly higher, and the total for all renewables still is under 20%, and falling ever so slightly each week, despite wind power having a good week.

Coal fired power is still higher than 70% of all power being generated.

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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