Australian Daily Electrical Power Generation Data – Sunday 2nd December 2018 – Plus Weekly And Rolling Totals

Posted on Mon 12/03/2018 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 some of the images. That scale (the total power shown on the left hand axis) has been changed to show the graph at a larger size.

Sunday 2nd December 2018

Total Power Generation All Sources

Here, the black line across the top of the graph shows the total power generation from every source. 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. 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 – 17200MW

Daily Peak Power Consumption – 24400MW

Daily Minimum Generated Power – 17900MW

Daily Maximum Generated Power – 25200MW

Average Total Power Generation – 21300MW

Total Power Generation In GWH – 511.2GWH

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 the blue line in the image directly above.

The black line just under that top black line is the Sub Total just for coal fired power. 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 – 13060MW

Daily Peak Coal Fired – 17940MW

Average Coal Fired Generation – 15380MW

Total Generated Power – 369.12GWH

Average Percentage Of Total – 72.21%

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 – 470MW

Daily Peak – 2070MW

Average Natural Gas Fired Generation – 960MW

Total Generated Power – 23.04GWH

Average Percentage Of Total – 4.51%

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 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) 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 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 – 3500MW

Daily Peak – 6000MW

Average Renewable Generation – 4620MW

Total Generated Power – 110.88GWH

Average Percentage Of Total – 21.68%

Generation From Other Sources

This image shows the power being generated from the seven 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 – 340MW

Total Generated Power – 8.16GWH

Average Percentage Of Total – 1.60%

Hydro Power Generation

This image shows all Hydro power generation. It is the same as the orange line 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 man 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 – 440MW

Daily Peak – 2010MW

Average Hydro Generation – 970MW

Total Generated Power – 23.28GWH

Average Percentage Of Total – 4.55%

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 purple coloured line in the image at the top showing generation from all sources.

The total Nameplate for all these wind plants is 5452MW.

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)

Daily Minimum – 2200MW (11.15PM)

Daily Peak – 3830MW (4.25PM)

Average Wind Generation – 3130MW

Total Generated Power – 75.12GWH

Average Percentage Of Total – 14.69%

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 line you can just see in that top image.

The total Nameplate for all these 29 solar plants is 2021MW.

Daily Minimum – Zero

Daily Peak – 1350MW

Average Solar Plant Generation for hours of generation – 920MW (5.30AM till 7.00PM)

Average Solar Plant Generation across the whole 24 hour day – 520MW

Total Generated Power – 12.48GWH

Average Percentage Of Total across the whole 24 hour day – 2.44%

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 7800MW, and that is a large total. However, that total equates to 1.8 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, while seemingly still high is spread across that huge number of installations across the whole of this coverage area.

Daily Minimum – Zero

Daily Peak – 4330MW

Average For Hours of Generation – 2240MW (5.30AM till 7.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1310MW

Total Generated Power – 31.44GWH

Average Percentage Of Total across the whole 24 hour day – 6.15%

Notes

  1. Finding Averages – On each 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. For coal fired power, I do this on a State by State basis (for the 3 States with coal fired power) and then add the total for each State together.
  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.
  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 day, similar to weekend days had the same power consumption and power generation as for the day before the Saturday, and even though the overall average was the same, the mix of power generation from the different sources varied.

The average for coal fired power was lower by 220MW per hour to an average of 15380MW. The Number 3 Unit at the Eraring plant in New South Wales came back on line at 11AM, and was back delivering its full power by 5PM, in time for the evening Peak. There are now only six of those coal fired Units off line.

The averages for all other sources were down, mainly because wind power was a lot higher on this day than usual. The average for natural gas fired power was lower by 80MW, the average for those smaller Other sources was lower by 30MW, the average for solar plant power was lower by 10MW, and the average for hydro power was lower by 400MW.

Wind power had a good day, and its average was up by a whopping 740MW to an hourly average of 3130MW, which gave wind power a daily operational Capacity Factor of 57.4%

Even on weekends, there is no resting for those coal fired plants as they delivered more than 72% of all the required power.

*****

WEEKLY DATA For Week 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

Nine        3698.4      2736.48     280.56       83.76         597.6        259.68       256.56      81.36          214.08

Percent of total        73.99%       7.59%       2.26%       16.16%        7.02%        6.94%      2.20%          5.79%

COMMENTS for this week.

As Summer approaches, overall power consumption starts to rise, as does power generation, and this week, the total power generation of almost 3.7TWH was higher than last week’s total by 4.7%.

The total power generated by all those coal fired Units was higher by 8.6%, probably because more of those Units are coming back on line in readiness for when they will be needed across this Summer. The rotational closure of those Units is easing back now, and it won’t be too long before most of them will be fully operational.

The total power generated from the three renewable sources of power plant power was lower by 16%, mainly due to the low wind power total for this week, when compared to last weeks good total, but again, that just highlights the variability of wind power, not only on the day to day basis, but also on a weekly basis. While wind power had two good days this week, there were three days when it was really low. That weekly power generation from wind power of 256.56GWH gave wind power a weekly operational Capacity Factor of 28%, and see here how, while that is not much lower than the year round average Capacity Factor, it was so variable on that day to day basis.

Both versions of solar power are slowly rising as Summer approaches and the Sun moves further South, increasing the hours of insolation, and also increasing the hours of power generation. Even so, note that at the high point for both of them, around Midday, power generation at its absolute best time of the day, it still only manages to make 50% of its total nameplate, and still only delivers 8% of all the power required.

The total power delivery from coal fired power is still at that mark over 70%, and this week, it was 74%.

*****

ROLLING TOTALS After Week 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

Nine       32162.4   24029.52    2187.84     638.16     5306.88       2278.8       2460.48    567.6          1695.6

Percent of total         74.71%      6.80%       1.99%        16.50%        7.09%        7.65%       1.76%           5.27%

ROLLING TOTALS After Week 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

Nine       33858      24029.52   2187.84     638.16       7002.48     2278.8      2460.48     567.6         1695.6

Percent of total        70.97%       6.46%       1.88%        20.69%      6.73%        7.27%         1.68%         5.01%

COMMENTS for this week.

Note here that when taking into account just the power generated by registered power plants, coal fired power is still steady at just under three quarters of all generated power.

Because renewable power was lower on the week, that percentage showed the biggest change, down by half a percent, when all other sources except wind changed by only tenths of a percent.

After nine weeks now of taking the data wind power has an operational Capacity Factor of 29.85%, which is right on that year round average.

When f the increasing total for rooftop power is added to the renewable total, you can still see that renewables still only manage just that 20% of all generated power.

Coal fired power has just fallen below 71%, and while expressed as a percentage, you don’t get the full idea, of how much that really is, regularly delivering greater than 15000MW, nine times more than wind power, twenty five times more than solar plant power and ten times more than rooftop solar 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.

OzPowerGenerationTFO

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