23rd January 2006 – new record for peak NEM-Wide demand

(click on the chart for a closer look)

You can also note the following:

(a) A coincident reduction in output at Tarong power station (units 1, 2 and 4 reduced output
from 350MW to 280MW) would have had the impact of sustaining the price spike;

(b) CS Energy and Stanwell Corporation units can be seen to increase output to
supply the additional demand.

(click on the chart for a closer look)

You can also note the following:

(a) There was a substantial drop in production at the two Hunter Valley coal plants
(Bayswater and Liddell) as 7 units collectively reduced output by 840MW.

(b) There was also a drop in production of about 180MW at Delta’s Mt Piper station.

(c) No significant change in production was noted for Eraring station.

(click on the chart for a closer look)

In addition, it can be seen that the price spikes experienced early in the morning coincided
with reductions in output at both Loy Yang A and Loy Yang B stations:

(a) All 4 units at Loy Yang B reduced output from 383-425MW to 300MW in the period to 2am.
This low level of production was mostly maintained through until 7am (NEM time).

(b) Both Loy Yang B units had their output reduced from 500MW to about 392MW for the
period 1:30am to 7am.

As can be seen, 2 significant price spikes eventuated during this period. It should be noted
that this spike did not transfer through to NSW and QLD (as seen in the charts above).

(click on the chart for a closer look)

This chart is very similar to that for Victoria, with the spikes experienced in the morning
coupled with the solid prices experienced NEM-wide (i.e. mainland) in the afternoon. In
particular, please note that:

(a) TRU Energy (in its Torrens A & B stations) was called on to make up for the loss in
production at the Loy Yang stations during the morning.

(b) All the highlighted stations show solid contributions during the afternoon peak
in demand.