Australian Daily Electrical Power Generation Data – Sunday 12th May 2019 – Plus Weekly And Rolling Totals

Posted on Mon 05/13/2019 by

3


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 12th 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 – 17250MW (4.05AM)

Daily Peak Power Consumption – 24500MW (6.30PM)

Daily Minimum Generated Power – 17600MW (4.05AM)

Daily Maximum Generated Power – 24700MW (6.30PM)

Average Total Power Generation – 20850MW

Total Power Generation In GWH – 500.4GWH

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 – 14470MW

Daily Peak Coal Fired – 18110MW

Average Coal Fired Generation – 16210MW

Total Generated Power – 389.04GWH

Average Percentage Of Total – 77.75%

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 – 1000MW

Daily Peak – 3430MW

Average Natural Gas Fired Generation – 1660MW

Total Generated Power – 39.84GWH

Average Percentage Of Total – 7.96%

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 – 1800MW

Daily Peak – 3200MW

Average Renewable Generation – 2530MW

Total Generated Power – 60.72GWH

Average Percentage Of Total – 12.13%

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 – 450MW

Total Generated Power – 10.8GWH

Average Percentage Of Total – 2.16%

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 – 670MW

Daily Peak – 2700MW

Average Hydro Generation – 1140MW

Total Generated Power – 27.36GWH

Average Percentage Of Total – 5.47%

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 – 440MW (3.25PM)

Daily Peak – 1620MW (3.25AM)

Average Wind Generation – 960MW

Total Generated Power – 23.04GWH

Average Percentage Of Total – 4.60%

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 – 1450MW

Average Solar Plant Generation for hours of generation – 950MW (7.00AM till 6.00PM)

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 – 2.06%

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 – 2950MW

Average For Hours of Generation – 1570MW (6.30AM till 6.00PM)

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 – 3.60%

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 – 2200MW

Average Across the whole day – 1390MW

Total Generated Power – 33.36GWH

Average Percentage of Total across the whole 24 hour day – 6.66%

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 –  2200MW – 10.45AM – 11.11%

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 – 600MW – 6.30PM – 2.43%

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, pretty much normal for a Sunday, overall power consumption fell, as did power generation, and that was down to a total of 500.4GWH for the day, at an hourly average of 20850MW, and that was 600MW lower than for the day before.

The early AM Base Load was 500MW lower to 17600MW, and the evening peak, a little later in the evening at 6.30PM was 300MW lower at 24700MW. In the five States with their peaks at differing times, the peak in New South Wales (NSW) was 30MW lower. In Queensland, it was 50MW higher. In Victoria, the peak there was 50MW lower. In the two States with the lowest power consumption, the peak in South Australia was the same as for the day before, and in Tasmania, it was 110MW higher.

While that overall power generation fell, the average for coal fired power actually rose, by almost the same amount as the fall in that overall, with coal fired power’s average up by 610MW. The range between the low for the day and the high was 3640MW and coal fired power reached a maximum power generation of 18110MW. In Victoria, Unit 3 at the Yallourn W plant started to come back on line at around Midnight, and was back close to its maximum power generation at 4.30AM There are now eight of those coal fired Units off line, four in Queensland, three in NSW, and one in Victoria.

The average for natural gas fired power was lower by 130MW. The average for those smaller Other sources was higher by the smallest amount, just 10MW higher. The average for hydro power was lower by 50MW and the average for solar plant power was the same as it was for the day before.

Wind power was way down on what it was the day before, in fact less than half that day before’s total, at an average of just 960M, and that was a drop of 1040MW. The low of 440MW is at a Capacity Factor (CF) of just 7.6%, and you can’t run a Country if all your wind towers can only deliver 2.5% of the required power. That average of 960MW is at a daily operational CF of 15.72, barely half of that year round average, and again it shows that wind power can have good days and bad days in close succession, and note here that even a good day is only 40% of its total Nameplate.

With the overall down, and coal fired power up, you can see that coal fired power delivered 77.75% of all the power required across the whole day.

*****

WEEKLY DATA For Week Thirty Two.

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

32             3750        2643.6       373.68       88.56         644.16       246.48       329.04      68.64           140.88

Percent of total       70.50%       9.96%        2.36%        17.18%        6.57%        8.78%       1.83%          3.76%.

COMMENTS for this week.

As Winter approaches, power consumption rises and this week, it started to rise by a larger percentage than last week. That overall total for generated power was up to 3750GWH for the week, arise of 2.9%, and that total gives an hourly average across the whole week of 22320MW per hour.

The lowest early AM Base Load was 17300MW on Monday, and the highest was 18400MW on Thursday. The lowest peak was 24700MW on Sunday and the highest peak was 27400MW on Friday.

The lowest daily average for the week was on Sunday, as usual, and that was an hourly average of 20850MW, and the highest daily average was 23750MW on Thursday, and the difference between that low and the high was 2900MW, and that’s 12.2%.

With the overall power generation higher, all sources were higher this week for their power generation, but in roughly the same percentages across the board, so those percentages of the total were relatively close to what they were the week before.

That total power generated from coal fired sources of 2643.6GWH is at an hourly average of 15735MW. The highest range between the low on the day and the high was 4360MW on Wednesday and the highest power generation from coal fired power was 18110MW on Sunday. This week, there were between eight and ten Units off line at any one time.

With the days becoming shorter with the approach of Winter, both versions of solar power dropped marginally, so that toal for the week from those three renewables was a little lower.

The total power generated from wind power was a little higher than last week, but with the overall up by a higher amount, that percentage of the total from wind power was actually a little less by a tenth of a percent. That total power from wind, 329.04GWH gave wind power an operational Capacity Factor for the week of 32.1%, just a little higher than the year round average. That’s even with wind power having three good days, two average days and two poor days, so, from that you can see that even though wind is good at times, just a day or two when there is no wind can drag that average right back down, and keep in mind here that a good day for wind power is still only between 40 and 45% of Nameplate, and it seems a little incongruous to say that wind power is good even though it dos not even make half its Nameplate.

That power delivered from coal fired sources, 2643.6% meant that this week, coal fired power delivered 70.5% of all the power needed across the week, and that was one percent lower than last week.

*****

ROLLING TOTALS After Week Thirty Two (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

32         119986.8  88722.48   10247.28   2490.48    18526.56    7455.12    8803.68    2267.76      6074.76

Percent of total        73.94%      8.54%        2.08%        15.44%       6.21%        7.34%       1.89%         5.06%

ROLLING TOTALS After Week Thirty Two (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

32       126061.56  88722.48  10247.28    2490.48   24601.32    7455.12    8803.68    2267.76       6074.76

Percent of total        70.38%      8.13%       1.98%        19.51%         5.91%       6.98%       1.80%          4.82%

COMMENTS for this week.

Again, as expected, there was little change in the delivery of power from all sources on a percentage basis. Coal fired power fell a little (one tenth of one percent) and renewable power rose a little, (just less than one tenth of one percent) but is still below that 20% mark.

With all sources added into the overall, coal fired power still is over 70% of all power required.

That total from wind power, 8803.68GWH gives wind power an operational Capacity Factor of 26.82%, a slight rise this week, with wind power above average on the week.

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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