Australian Daily Electrical Power Generation Data – Monday 25th February 2019

Posted on Tue 02/26/2019 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 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.

Monday 25th February 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 – 17740MW (3.15AM)

Daily Peak Power Consumption – 27980MW (5.40PM)

Daily Minimum Generated Power – 18300MW

Daily Maximum Generated Power – 28300MW

Average Total Power Generation – 23900MW

Total Power Generation In GWH – 573.6GWH

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 – 14090MW

Daily Peak Coal Fired – 18880MW

Average Coal Fired Generation – 16700MW

Total Generated Power – 400.8GWH

Average Percentage Of Total – 69.88%

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 – 1060MW

Daily Peak – 4610MW

Average Natural Gas Fired Generation – 2570MW

Total Generated Power – 61.68GWH

Average Percentage Of Total – 10.75%

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 – 3000MW

Daily Peak – 5500MW

Average Renewable Generation – 3920MW

Total Generated Power – 94.08GWH

Average Percentage Of Total – 16.40%

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 – 710MW

Total Generated Power – 17.04GWH

Average Percentage Of Total – 2.97%

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 – 460MW

Daily Peak – 3850MW

Average Hydro Generation – 1530MW

Total Generated Power – 36.72GWH

Average Percentage Of Total – 6.40%

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 5661MW.

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 – 820MW (3.00PM)

Daily Peak – 2920MW (6.20AM)

Average Wind Generation – 1830MW

Total Generated Power – 43.92GWH

Average Percentage Of Total – 7.66%

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 29 solar plants is 2241MW.

Daily Minimum – Zero

Daily Peak – 1510MW

Average Solar Plant Generation for hours of generation – 1000MW (6.00AM till 7.30PM)

Average Solar Plant Generation across the whole 24 hour day – 560MW

Total Generated Power – 13.44GWH

Average Percentage Of Total across the whole 24 hour day – 2.34%

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 – 4080MW

Average For Hours of Generation – 2200MW (6.00AM till 7.30PM)

Average Rooftop Solar Generation across the whole 24 hour day – 1240MW

Total Generated Power – 29.76GWH

Average Percentage Of Total across the whole 24 hour day – 5.19%

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 – 3700MW

Average Across the whole day – MW

Total Generated Power – 57.36GWH

Average Percentage of Total across the whole 24 hour day – 10.00%

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 –  3700MW – 9.00AM – 15.81%

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 – 1600MW – 5.40PM – 5.65%

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

As is usual, power consumption rose substantially on this back to work Monday, and power generation followed that, with the average power generation coming in at 23900MW per hour across the day, a rise of 2650MW, and that’s a large rise of 12.5%.

The minimum power generation on this day (the early AM Base Load) was the same as it was for the day before, but what did rise dramatically was the evening peak, which was higher by 3200MW. It was again spread out across a longer than usual time where that peak hovered around that absolute high, within 200MW for almost 2 hours or so. The peaks for the individual States were, as always at differing times, and the rise in those individual State peaks were varied. In New South Wales, (NSW) their peak was 950MW higher. In Queensland, it was only marginally higher, a rise of barely 200MW. In the Southern States however, those rises were substantial. Victoria was 1500MW higher, and even the two smallest consuming States were also higher, South Australia by 350MW and even Tasmania higher by 200MW and in a State with such small consumption, that 200MW rise comes in at almost 17% higher than it usually is.

Coal fired power also showed a marked increase, but with the overall rising by so much the rise in coal fired power was not even half of that total rise. That average for coal fired power was 16700MW, a rise of 1200MW. The range from the low on the day to the high was also way up, and on this day, that range was 4790MW.  As to those Units off line, well in Victoria, both Units came back on line on this day. Unit 3 at the Loy Yang A plant came back on line at 1PM, and by 8PM, it was back delivering its full output, after resting at 80% for a little more than half that time. Unit 2 at the Yallourn W plant also came back on line at 8.30PM. In Queensland, Unit 1 at the Gladstone plant went off line at 11.30, and an hour or so later, Unit 5 at the same plant came back on line and slowly raised its output back to maximum by 9PM. There are now only two coal fired Units off line, one each in NSW and Queensland.

The second largest rise on the day was in natural gas fired power, mostly in Victoria, where more power was required, and that average for natural gas fired power was 2570MW up by 870MW on the average for the day before. Victoria also accounted for most of the rise in the average for those smaller Other sources, and that was up by 200MW to 710MW per hour average. The average for solar plant power was higher by the smallest margin 10MW. The average for hydro power was also well higher on this day, up to 1530MW, a rise of 700MW, and as you can see from the hydro graph, that green line indicates the output from the huge Murray One and Two plant, and that was delivering its maximum output of 1500MW for almost five hours, delivering its power also into Victoria, where it was needed the most.

The average for wind power fell by 330MW on this day to an hourly average of 1830MW, giving wind power a daily operational Capacity Factor of 32.335, a little above the year round average. Again, that average for wind power does not tell the whole story, as you can see from the graph for wind power, it was at its lowest starting around Midday, and stayed low, right as that much larger evening peak was beginning to kick in. That can be further highlighted when you look at that second last graph there showing the total for wind and solar plant power combined, both low right at that evening peak, and in the data at the left of the image, it shows that at that evening peak, wind and solar combined were only delivering 5.65% of all the required power.

On a day when coal fired power rose , and the overall rise from every source was much higher, then coal fired power delivered just a little lower than 70% of all the required 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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