Looking at the change in average Demand over the day on 1st March
Then looking at the generation in terms of capacity factor of installed capacity by type
We get a clearer picture of the need for better planning for high demand days. I think the issue is there is now insufficient despatchable generation response available in SA & VIC because the focus has only been on RET. On the 1st when the demand increased the wind and solar decreased, the coal was flat out and therefore couldn't assist other than not fail.
I think the current generation mix is not sustainable unless managed better and any problem with the ageing but reliable coal fleet will cause predictable problems.
The issue will not go away and unless addressed quickly we may have some issues in Winter if the wind & solar are not managed in the interest of consumers.