Australian Daily Electrical Power Generation Data – Sunday 5th May 2019 – Plus Weekly And Rolling Totals

Posted on Mon 05/06/2019 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 5th May 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 (4.10AM)

Daily Peak Power Consumption – 23890MW (6.40PM)

Daily Minimum Generated Power – 16900MW (4.10AM)

Daily Maximum Generated Power – 24200MW (6.40PM)

Average Total Power Generation – 20300MW

Total Power Generation In GWH – 487.2GWH

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 – 12790MW

Daily Peak Coal Fired – 16830MW

Average Coal Fired Generation – 14540MW

Total Generated Power – 348.96GWH

Average Percentage Of Total – 71.62%

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 – 1760MW

Daily Peak – 4070MW

Average Natural Gas Fired Generation – 2350MW

Total Generated Power – 56.4GWH

Average Percentage Of Total – 11.58%

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 – 3500MW

Average Renewable Generation – 2740MW

Total Generated Power – 65.76GWH

Average Percentage Of Total – 13.50%

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 – 670MW

Total Generated Power – 16.08GWH

Average Percentage Of Total – 3.30%

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 – 1030MW

Daily Peak – 2760MW

Average Hydro Generation – 1550MW

Total Generated Power – 37.2GWH

Average Percentage Of Total – 7.64%

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 – 400MW (9.20AM)

Daily Peak – 1280MW (10.55PM)

Average Wind Generation – 710MW

Total Generated Power – 17.04GWH

Average Percentage Of Total – 3.50%

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 – 1550MW

Average Solar Plant Generation for hours of generation – 1040MW (7.00AM till 6.00PM)

Average Solar Plant Generation across the whole 24 hour day – 480MW

Total Generated Power – 11.52GWH

Average Percentage Of Total across the whole 24 hour day – 2.36%

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 – 3410MW

Average For Hours of Generation – 1877MW (6.30AM till 6.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 900MW

Total Generated Power – 21.6GWH

Average Percentage Of Total across the whole 24 hour day – 4.43%

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 – 2100MW

Average Across the whole day – 1190MW

Total Generated Power – 28.56GWH

Average Percentage of Total across the whole 24 hour day – 5.86%

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 –  2100MW – 12.55PM – 11.60%

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 – 800MW – 6.40PM – 3.30%

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

Again we have a weekend day with lower power consumption, and power generation following that down as well. The total power generation on this day was 487.2GWH, at an hourly average of 20300MW, and that’s 550MW lower than the day before, also a weekend day with lower generation.

The early AM Base Load was 500MW lower at 16900MW, and that’s 1100MW lower than the year round average. The evening peak at the later time of 6.40PM was 400MW higher at 24200MW. In the five States, with their peaks at slightly differing times, the peak in the largest power consuming State, New South Wales, (NSW) was 310MW higher. In the next highest power consuming State, Queensland, the peak was 70MW lower. In Victoria the third highest power consumer, that peak was 250MW higher. In the two lowest power consuming States, the peak in South Australia was 30MW lower and in Tasmania, it was 100MW higher.

The average for coal fired power was 14540MW, and that was 550MW lower, the same fall as for the overall power generation from every source. The range between the low for this day and the high was 4040MW and coal fired power had a maximum power generation of 16830MW. In Victoria, Unit 3 at the old Yallourn W plant came back on line at 4PM, and in a slow rise, was back near its maximum power generation by Midnight. In Queensland, Unit 2 at the Millmerran plant came back on line at 10.30AM, and also slowly rose back to its maximum power generation by 10.30PM.There are ten of those coal fired Units off line, five in Queensland, three in Victoria, and two in NSW.

While the overall was lower, the average for natural gas fired power was 270MW higher on the day. The average for those smaller Other sources was also higher on the day, by 180MW, and when this is from a smaller source, that 180MW is a large percentage increase. The average for hydro power was also higher on the day, up by 160MW. The average for solar plant power was higher on the day as skies cleared for bright sunny conditions, so insolation was higher on the day, and solar plant power was higher by 190MW, ironically higher on a day when overall generation is at its lowest for the week. Rooftop solar power was also well up on that day as well.

Now, with natural gas, other sources and hydro all higher, it is pretty obvious, (using earlier data as a guide) that wind power was lower, and that was indeed the case, as wind power, after some good days, was about as low as it could actually get, down to an average of only 710MW, a fall of 800MW on the day before. That average of just 710MW gave wind power a daily operational Capacity Factor of only 11.63% barely one third of the year round average. Note also that wind power is below 10% of capacity for 14 consecutive hours across the day (from 3AM till 5PM) during the day when the most power is actually being consumed, and at that evening peak time at 6.40PM, wind power is only contributing 3.3% of the power required at that time.For the sake of comparison here, coal fired power has four times the Nameplate of wind power, and at this same time of peak power delivery, coal fired power was delivering 24 TIMES the power of wind power.

Even on the lowest power generation day for any week, with the overall and coal fired power both well down, coal fired power still delivered 71.63% of all the required power.

*****

WEEKLY DATA For Week Thirty One.

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

31            3645.6     2596.32     346.56        72.96         629.76       243.36       328.08      58.32           121.2

Percent of total       71.22%       9.51%        2.00%        17.27%        6.67%        9.00%      1.60%          3.32%.

COMMENTS for this week.

This was a full working week, after last week with two Public Holidays, and overall power consumption was higher, with power generation rising to cover that. The total power generation for the week was 3645.6GWH, and that was a rise of 5.7% over the week before, so it’s easy to see that power consumption is higher on working days. That overall power generation is at an hourly average of 21700MW.

The highest early AM Base Load for the week was on Thursday at 18000MW, and the lowest was on the Sunday at 16900MW. The highest of the evening Peaks was 26000MW on the Wednesday and the Thursday, and the lowest peak was 23800MW on Saturday. The highest daily average for the week was 22550MW on Thursday, and the lowest was 20300MW on Sunday, so the difference between the high and low for the week was 2250MW and that’s a significant 10% variation.

The delivery of power from the coal fired sector was slightly lower this week, mainly due to the fact that more Units were off line. That total power generation of 2596.32GWH is at an hourly average of 15450MW. The highest range between the low and the high for the week was on Monday, when it was 4440MW, ad the highest generation for the week from coal fired power was also on the Monday at 18020MW. This week, the number of Units off line ranged between eight and twelve as maintenance is carried out in the lead up to Winter when more of those coal fired Units will be required to be on line.

The average for all renewable sources of power generation was slightly higher this week. Both of the solar power sources were lower on the week, with overcast conditions and the natural lowering as the Sun moves further to the North with the approach of the Winter Months. Both Hydro and wind power were slightly higher, taking that overall for renewables higher.

That total power delivered from wind power was higher this week with some good days up over 40% Capacity Factor power delivery, and that total generation of 328.08GW gave wind power a weekly operational Capacity Factor of 31.98%, almost 2% higher than the year round average.

On a week with the overall higher and coal fired power a little lower, coal fired power still delivered 71.22% of all power for the week.

*****

ROLLING TOTALS After Week Thirty One (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

31          116236.8   86078.88   9873.6     2401.92     17882.4     7208.64    8474.64     2199.12      5933.88

Percent of total        74.06%      8.49%        2.07%        15.38%       6.20%        7.29%       1.89%         5.10%

ROLLING TOTALS After Week Thirty One (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

31        122170.68   86078.88   9873.6     2401.92    23816.28    7208.64    8474.64    2199.12       5933.88

Percent of total        70.46%      8.08%       1.97%        19.49%         5.90%       6.93%       1.80%          4.86%

COMMENTS for this week.

After 31 weeks now, percentages change very little, quite naturally, and even any huge weekly changes would not change those percentages by very much at all.

That overall total power generation for the first Rolling Total, now more than 116TWH means that the overall hourly power generation for these 31 weeks is 22320MW, and that’s only 20MW lower than it was for last week.

The totals for all renewables rose fractionally this week, after a week of higher power generation from both hydro and wind power, but as you can see from that second set of Rolling Totals, the percentage for all renewables with rooftop solar included is still below 20%. Both versions of solar power are getting lower, as expected, with Winter coming, the time of year for the lowest generation from solar power.

That total generation from wind power, 8474.64GWH for these last 31 weeks gives wind power an operating Capacity Factor for that time of 26.65%.

The power delivery from coal fired power is still at almost the same levels as for the last few weeks now, both over 70% of all the generated power.

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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