Australian daily electrical power generation data – monday 21st may 2018 pa pundits – international k electric jobs 2015


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.

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

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 blue line) removed from the graph, As in that top image, it shows Hydro Power, (orange line) wind power, (purple line) and solar power. (red line) What I have then done is added the black line just above those coloured lines and this indicates the Sub Total of power from those three renewable sources only. This is to highlight the gap between the total power generation and the total from renewable sources alone.

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 orange line is for hydro, the purple line is for wind, and the red line is for solar, and the black line is the Sub total for all renewable power. The other colour just showing 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.

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.

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.

• Finding Averages – On each graph there are 9 time points. Add the total at each time point together, and divide by 9. 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.

One of the unexpected things I have found, even after just the first week, is that coal fired power is relatively stable in the amount of power it generates, staying at close to the same average each day, and I was waiting for a day like this to show you something.

This Monday showed a large output from wind power and I wanted to see if it had any major effect on coal fired power. The average for Wind power across the day was 2410MW, and that’s a good day for wind power, and that output is at a Capacity factor of 48%, well above the yearly average of 30%.

So, what I wanted to do was to compare a day of good wind power to a day of low wind power, and see what effect it had on coal fired power. The correct manner to do this is to compare a work day with a work day, so here I have the totals from today and the totals for last Friday, when, realistically, being a working day, the total overall power generation should be relatively similar.

The difference was made up solely from natural gas fired power and hydro power, with natural gas 910MW lower and hydro at 760MW lower, so, with the overall lower by 200MW, that covers the increase in wind power, and the remaining 10MW is because solar power was 10MW higher on the Monday than on the Friday, neatly making up to equal totals for those averages all round.

Now, one of the (perhaps unintended) consequences of this is that even though wind power was considerably higher, the fact that they are using Hydro as the ‘adjustment factor’ here, then even though there is a slight increase for the average for ALL renewables, it is not as high as that increase in wind power might make it, so the average from all renewables only increased slightly, by around 3%.

So, even on a (supposedly) good day for renewables, the average delieverd from all AEMO recorded renewables, and then adding on the average from rooftop solar power (for the whole 24 hour day) that average from those renewables is still only 23% of the total required power. Consider now that coal fired power alone delivers 74% of that required power, well more than three times the total from every renewable source in the Country.

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.