Australian Daily Electrical Power Generation Data – Sunday 21st April 2019 – Plus Weekly And Rolling Totals

Posted on Mon 04/22/2019 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 21st April 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 – 16710MW (4.45AM)

Daily Peak Power Consumption – 21970MW (6.10PM)

Daily Minimum Generated Power – 17200MW (4.45AM)

Daily Maximum Generated Power – 22300MW (6.10PM)

Average Total Power Generation – 19300MW

Total Power Generation In GWH – 463.2GWH

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 – 13130MW

Daily Peak Coal Fired – 17370MW

Average Coal Fired Generation – 14920MW

Total Generated Power – 358.08GWH

Average Percentage Of Total – 77.31%

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 – 840MW

Daily Peak – 1780MW

Average Natural Gas Fired Generation – 1180MW

Total Generated Power – 28.32GWH

Average Percentage Of Total – 6.11%

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 – 2100MW

Daily Peak – 4000MW

Average Renewable Generation – 3030MW

Total Generated Power – 72.72GWH

Average Percentage Of Total – 15.70%

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 – 170MW

Total Generated Power – 4.08GWH

Average Percentage Of Total – 0.88%

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 – 430MW

Daily Peak – 2060MW

Average Hydro Generation – 820MW

Total Generated Power – 19.68GWH

Average Percentage Of Total – 4.25%

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 – 770MW (3.25PM)

Daily Peak – 3590MW (12.20AM)

Average Wind Generation – 1840MW

Total Generated Power – 44.16GWH

Average Percentage Of Total – 9.53%

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 – 1320MW

Average Solar Plant Generation for hours of generation – 730MW (6.30AM till 6.30PM)

Average Solar Plant Generation across the whole 24 hour day – 370MW

Total Generated Power – 8.88GWH

Average Percentage Of Total across the whole 24 hour day – 1.92%

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 – 2980MW

Average For Hours of Generation – 1500MW (6.30AM till 6.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 750MW

Total Generated Power – 18GWH

Average Percentage Of Total across the whole 24 hour day – 3.89%

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 – 3600MW

Average Across the whole day – 2210MW

Total Generated Power – 53.04GWH

Average Percentage of Total across the whole 24 hour day – 11.45%

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 –  3600MW – 12.20AM – 18.46%

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 – 1200MW – 6.10PM – 5.38%

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 was a typical Sunday, the lowest power consumption of the week, and power generation dropped in line with that consumption, down to a daily total power generation of 463.2GWH, at an hourly average of 19300MW, a fall of 450MW over the day before.

The early AM Base Load was lower by 200MW to 17200MW, which is typical for these Autumn days, slightly lower than the year round average of 18000MW. The evening peak was 22300MW, and that was 800MW lower than it was for the day before, and again at the slightly earlier time of just after 6PM. The peaks in the five States were at differing times. In New South Wales, (NSW) the peak was 90MW lower. In Queensland, it was also 90MW lower. In Victoria, it was 70MW lower. In the two smallest power consuming States, the peak in South Australia, it was 140MW lower, and in Tasmania, it was actually higher, up by 40MW.

While that overall decreased, the average for coal fired power was higher on this day, up to 14920MW, a rise of 130MW. The range between the low on the day and the high was 4240MW coming from a lower low, and that maximum for coal fired power of 17370MW was also lower than usual, and the time spent above 17000MW was also less as well. There was no change in the number of coal fired Units off line, and that is still at eight of them, two in Victoria, and three each in NSW and Queensland.

The average for natural gas fired power was also slightly higher, up by 120MW. The average for those smaller Other sources was higher by 20MW, but as you can see from the graph for that source, there was little call for ‘top up’ power from this source, generating at a low average of only 170MW per hour across the day, again supplying less than one percent of the generated power. The average for hydro power was also higher, up by 150MW, and the average for solar plant power on a day with heavy overcast and rain was 140MW lower.

Even though wind power started out this 24 hour recording period at a high level, it fell across the day consistently, and then rose again from that low point. The average for wind power was lower by 730MW to an hourly average of 1840MW, which gave wind power a daily operational Capacity Factor of 30.13%, right on that year round average. Even so, you can see from the graph that when power was needed the most, in the lead up to, and then at, and after that evening peak, wind power was low, and hence top up power was required from the usual sources which can deliver on demand for when extra power is needed, natural gas fired power and hydro power.

On a day when the overall dropped, and coal fired power was higher, coal fired power delivered more than 77% of the required power.

*****

WEEKLY DATA For Week Twenty 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

29            3487.2     2599.44     237.36       38.64         611.76         171.12       366.48      74.16           149.52

Percent of total       74.54%       6.81%       1.11%          17.54%        4.91%       10.51%      2.12%          4.29%.

COMMENTS for this week.

This week took in the Easter holidays, and that meant an extra day of low power consumption, a week day (Good Friday)  when power consumption was lower than the normal, at a level seen on weekend days. So overall power generation for this week was 4.5% lower at a total weekly power generation of 3487.2GWH, and that’s at an hourly average of just under 20800MW.

The highest early AM Base Load for the week was on Wednesday at 18100MW and the highest peak for the week was 25800MW and that was on two days, Tuesday and Wednesday. The lowest average for the week was as usual on the Sunday at 19300MW and the highest average was 21800MW on Tuesday.

Power generation from coal fired power was slightly lower this week, but not as much in percentage terms as for the Overall from every source. The highest power generation for the week was 17830MW on the Thursday, and the average for coal fired power for the week was 15470MW, also on that same Thursday. The highest range between low and high for the week was 4390MW, on the Thursday as well. The number of coal fired units off line this week was a low of seven and a high of nine.

The big winner for this week was wind power, but there’s something well worth showing you here. Wind power had 6 days when it delivered its power at a higher Capacity Factor (CF) higher than the year round average of 30%, and even that day when it was lower, it was between 29% and 30%. The total power generated from wind power this week was 366.48GWH, the highest wind power generation in almost eight Months. That’s at an hourly average of 2180MW, and that’s from a Nameplate of 6106MW, and this gave wind power a weekly CF of 35.73%, well above that year round average of 30%. Having said that, with wind power high, then it’s percentage of the overall was also well up, at 10.51% of that overall, a rise of 4.07% above the week before. I mentioned above that the percentage of power generation from coal fired power rose, and that was by half of one percent, so again, you can see that even when wind power does well, it has no effect at all on what coal fired power delivers, and that goes against what we are being told, that more wind power means less coal fired power, or that wind can replace coal fired power, something that is just not happening at all. Wind power was higher by that percentage of 4.07%, and when you look at those two other sources which are used to compensate for the differences in wind power, natural gas fired power was lower in percentage terms of the overall by 1.77%, hydro power generation lower by 2.38%, for a total lowering from those two sources of 4.15%, and that’s all but the same for the rise in wind power’s percentage of the overall, again proving the point that the only sources affected by the rise and fall of wind power, are natural gas fired power and hydro power.

With wind power well up, hydro partially down, and solar power marginally higher, (even while only delivering 2% of that overall) then the percentage level of all those renewables was higher by just 1.6%, so even wind power being up has a lesser effect on all renewables, because hydro was down ….. BECAUSE wind was up.

On a week when the overall was lower, typical for Autumn, coal fired power delivered almost three quarters of all the generated power plant power.

*****

ROLLING TOTALS After Week Twenty 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

29          109142.4  80838.24   9298.08   2280.96    16725.12    6789.36    7860.24   2075.52      5668.68

Percent of total        74.07%      8.52%        2.09%        15.32%       6.22%        7.20%       1.90%         5.19%

ROLLING TOTALS After Week Twenty 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

29        114811.08   80838.24  9298.08    2280.96    22393.8     6789.36    7860.24   2075.52       5668.68

Percent of total        70.41%       8.10%       1.99%        19.50%         5.91%       6.84%       1.81%          4.94%

COMMENTS for this week.

With respect to that first set of Rolling Totals, that total power generation figure there comes in at an hourly average of 22400MW per hour, every hour for the last 29 weeks. The figures changed by the smallest amounts only, now that we are at week 29. so any changes will be only tiny in percentage amounts. The total for coal fired power rose this last week, and natural gas fired power and those smaller Other sources fell. The total for all renewables (just from power plants) rose by the slightest margin, helped upwards by a good week for wind power. Even so, with wind up, solar power plant power lower and hydro lower, then that renewables percentage barely moved.

When it comes to all generated power, that second set of Rolling Totals, with rooftop solar power generation included, the average for all four of those renewables rose by 0.04%, and coal fired power also rose by that same percentage as well. So, even though wind power had a really good week, the best total for seven Months in fact, it changed very little. The total percentage for renewables is still stuck below 20%, even as more wind plants and solar plants come on line, and rooftop solar installations increase in number.

Coal fired power is STILL delivering more than 70% of all the power required to run 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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