A follow up comment on power generation in the 21st century.
The above table I have produced is representative of the 20th century 'bricks and mortar' generation system. These days we have 'virtual power plants'. With a 'virtual power plant', rival generators can have under contract access to a rival's power station in a different island in times of unusual river flows (for example). Next there is the NZ power 'hedge market' operated out of the ASX I believe. Then of course there is the 'regular market' where gentailers can buy power off each other by signing up to the lowest quoted marginal cost net supplier of power. The whole thing has got very complex. Nevertheless I think there is still real value in looking at the 'hard asset' to 'customer sales' power balance. If nothing else it provides a 'base case' of what is happening, and is the ultimate measure of reversion should all of these fancy 'on paper' power trading systems be suspended.
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