hot Sunday, windy Sunday

I noted Sunday morning curtailment of potential generation was around record levels – a claim repeated Sunday afternoon at a rally against a facility in Prince Edward County. My friend Parker Gallant subsequently wrote on the wasted wind that day. I thought a post comparing the past Sunday to other days might be instructive.

I developed a single page daily report some time ago – something Parker felt useful. The report for Sunday October 15th estimates the cost to a Class B consumer of consuming one megawatt-hour of electricity at $145/MWh.

$145/MWh was up steeply from the $108/MWh I estimated as the average cost for Class B consumers on the previous day. That $37 difference is greater than the difference estimated for exporters: on Saturday their price averaged $27/MWh; on Sunday it was free. The difference in cost for exporters is due to the change in the Hourly Ontario Energy Price, which dropped from $135/MWh in hour 9 on Saturday, when wind was forecast to produce 149 megawatts, to negative prices overnight and back up to $0/MWh in hour 9 on Sunday when wind was forecast to produce 3,876 megawatts. The correlation is not difficult to spot:

chart (41).png

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