To provide further detail, the display section of deSide also contains a region-specific tab for each region (i.e. 5 in total) where this data is provided in further detail. Each of the 5 pages is identical in structure – just with data for a different region in focus. Different colours are used in the charts to help highlight the different region.
A sample for the Queensland region is shown here:
As we did with the “Whole of NEM” tab, we also disassemble this screen into its constituent parts to provide more explanation.
The main chart shown on this tab is essentially the same as the chart shown (for that region) on the “Whole of NEM” tab. Hence, the explanation provided here also applies to this chart – with some additional annotations provided for more detail.
In addition, please note these two tips about these charts within deSide:
|To customize the chart …||For any graph, if you hold down the left Shift key, and click on the title of the graph, you can directly change all the nitty-gritty details of the graph (including what is displayed, how it is displayed, and whether or not to show the legend).|
|To add a price threshold to the chart as a horizontal line …||This page has been provided to explain how you can do this.|
The panel of prices shown on the top-right of the display are a set of peak price forecasts under a range of sensitivity scenarios whereby AEMO says, in effect “now what would the price be, instead, if the QLD demand were higher (or lower) than what we have assumed by 100MW?” (or 200MW, and so on).
As shown in the image above, we’re using the QLD region tab as an example so the prices shown are all for the QLD region.
Note in this image that the colour-coded cells are mostly the same colour, because prices were flat at the time this image was taken. The +500MW and +1000MW sensitivity scenarios deliver higher peak QLD prices, which is understandable given the large change in demand this would entail.
Conversely, when times arise when the supply/demand balance is tighter (hence where rebidding, or unit trips, or other events are more likely to lead to price spikes):
- the colouring in the table makes this easy to see (in relation to peak price); and
- the spread of the grey lines in the chart also provides an indication of the sensitivity of the price forecast to relatively smaller (±200MW) changes in demand throughout the span of predispatch.
The map, at the bottom of this page, conveys the same information as the map on the “Whole of NEM” tab (it just looks a little different here). This is annotated below:
Next to the map is a similar chart showing 3 hours of history and 1 hour (P5) forecast of (5-minute) dispatch data:
The P5 forecast shown here is updated every 5 minutes, on a slightly different timing to the publication of actual dispatch prices (hence the overlap shown in the chart). We’ve also included this other tabular view to help you see how these successive forecasts converge on final prices.