Australian Daily Electrical Power Generation Data – Monday 16th September 2019

Posted on Tue 09/17/2019 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.

Monday 16th September 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 – 17070MW (4.00AM)

Daily Peak Power Consumption – 26190MW (6.40PM)

Daily Minimum Generated Power – MW ()

Daily Maximum Generated Power – MW ()

Average Total Power Generation – 22000MW

Total Power Generation In GWH – 528GWH

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 dark 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 – 12660MW

Daily Peak Coal Fired – 15520MW

Average Coal Fired Generation – 14180MW

Total Generated Power – 340.32GWH

Average Percentage Of Total – 64.46%

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 – 6060MW

Average Natural Gas Fired Generation – 2530MW

Total Generated Power – 60.72GWH

Average Percentage Of Total – 11.50%

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 – MW

Daily Peak – MW

Average Renewable Generation – 4770MW

Total Generated Power – 114.48GWH

Average Percentage Of Total – 21.68%

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 – 520MW

Total Generated Power – 12.48GWH

Average Percentage Of Total – 2.36%

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 – 840MW

Daily Peak – 3550MW

Average Hydro Generation – 1670MW

Total Generated Power – 40.08GWH

Average Percentage Of Total – 7.59%

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 6702MW, from a total of 55 wind plants.

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 – 1670MW (4.55PM)

Daily Peak – 3050MW (1.30PM)

Average Wind Generation – 2600MW

Total Generated Power – 62.4GWH

Average Percentage Of Total – 11.82%

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 41 solar plants is 3075MW.

Daily Minimum – Zero

Daily Peak – 1810MW

Average Solar Plant Generation for hours of generation – 990MW (6.00AM till 6.00PM)

Average Solar Plant Generation across the whole 24 hour day – 500MW

Total Generated Power – 12GWH

Average Percentage Of Total across the whole 24 hour day – 2.27%

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 – 4260MW

Average For Hours of Generation – 2120MW (6.00AM till 6.00PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1060MW

Total Generated Power – 25.44GWH

Average Percentage Of Total across the whole 24 hour day – 4.82%

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 – MW

Average Across the whole day – 3100MW

Total Generated Power – 74.4GWH

Average Percentage of Total across the whole 24 hour day – 14.09%

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 –  MW –   %

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 – MW –  %

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

UPDATE – Again, there was a minor glitch at the site I take the data from, and as was the case that last time, those images with the colours in them were not available. As happened that last time, it only has an effect on one of the data collection sets I use, that of those smaller Other sources, and this source is far and away the smallest contributor by percentage to the overall data, so it only has minimal effect. Again, as with the last time, for the purpose of this data collection, I have used the year round average I have for this source, so any change in the actual for this day is of less than minimal impact on the overall, and that effect would most probable by in the tenths of a percentage point at most, when compared to that overall total…..TonyfromOz.

As is usual for a back to work and school Monday, power consumption rose considerably, up by a substantial 17.6%, and on this day, the total power generation from those power plants came in at 528GWH, at an hourly average of 22000MW, and that was 2300MW per hour higher than it was when compared to the day before, the Sunday.

The early AM Base Load power generation figure was not available as it is one of those points on the Load Curve I use as a reference, and the same also applies for the evening peak. However, when it does come to both of these indicators, you can safely refer to the actual power consumption data for those same points in time, as those two totals are the similar to the generated power totals, the only difference being the losses in the overall grid system so those power generation figures would be around 500MW to 800MW higher. So, keeping that in mind that early AM Base Load figure for consumption was around 200MW higher than it was on the day before. The evening peak was substantially higher, and at the same time of 6.40PM, it was 26190MW and that was 3100MW higher than it was on the evening before. Across the five States with their individual peaks at differing times, the peak in New South Wales (NSW) was 1150MW higher. In Queensland, it was 500MW higher. In Victoria, it was 1030MW higher. In the two States with the lowest power consumption, the peak in South Australia was 310MW higher, and in Tasmania, it was 160MW higher.

On a day when the overall was considerably higher, every source contributed by going higher, except for solar plant power and that was 50MW lower, again highlighting the fact that even though at this time of year with the days becoming longer and the Sun a little higher in the sky, there are still days when solar plant power will be low, and again note her that the total power delivered from these solar plants on this day still only amounted to 2.27% of all the generated power.

The average for coal fired power was higher on the day, up to an hourly average of 14180MW, higher than the day before by 350MW. The range between the low for the day and the high was 2860MW and on this day, those coal fired Units generated a maximum of 15520MW. In Victoria, Unit 3 at the Loy Yang A plant went off line starting at 6.30AM, and by 8PM, it was back at zero output. This means that this Loy Yang plant, (A and B) now has three of its six Units off line. In NSW, Unit 2 at the Mt. Piper plant came back on line at 3PM, and in a slow staged rise, it was back at one third of its maximum power by Midnight. In Queensland, Unit 1 at the Callide power plant reduced its output at 6AM, across the day, and in two steps, one step down to half output, and the second step down to one third output, and at Midnight it was still at one third output. There are ten of those col fired Units off line, two in Queensland, and four each in NSW and Victoria.

The average for natural gas fired power was higher on the day by a substantial 1230MW, almost doubling its hourly average when compared to the day before. The average for those smaller other sources, was higher by 140MW, and here, keep in mind as I mentioned above, and for those reasons, I have used the year round average for this source. The average for hydro power was 510MW higher.

The average for wind power marked time when compared to the day before, virtually the same, just 120MW higher, and note how it barely moved when there was such a large increase in the overall, again proving that you cannot depend on wind power to be there when it is needed. That average for wind power of 2600MW gave wind power a daily operational Capacity Factor of 38.79, still higher than that year round average for this source of power generation.

On a day when that overall was so much higher, coal fired power delivered 64.45% 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.

OzPowerGenerationTFO

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