20/07/2011 9:23:23 AM
This article was first published in The Morning Bulletin under the heading Electricity dated 16 July 2011.
Electricity is the ultimate perishable good - It has to be used as it is produced. Coal fired power stations are at their most efficient when producing constant amounts for long periods of time. This is at odds with demand patterns, which fluctuate throughout the day, and in particular, with the weather. Industry says that power stations have to be built to meet peak demand, but coal fired power stations frequently lose money selling electricity in the off-peak, when demand is low. When demand is very high, wafer thin links between the states mean generators can’t even buy in from elsewhere, and in any event the wastage from transmission is high. Further, much distribution infrastructure is not set up to handle the two-way electricity flows necessary for a smart grid.
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