Report finds widespread problems such as inaccurate supply forecasts, significant power exports to other jurisdictions and multiple gas-fired power plants all being offline at the same time
Power transmission lines near Pincher Creek, Alta., on June 6. In January, Alberta ns received an emergency alert warning them to curtail power use to avoid catastrophic grid failure and in April they experienced rolling blackouts. Alberta ’s electricity grid needs better supply forecasting and more transparency to prevent the problems that led to an emergency alert in January and lights going out in April, according to the province’s power market watchdog.
That includes how the temperature swings affect ice forming on wind turbines, which played a role in the April blackouts: “What we’ve come to learn in talking to our service providers since then is that a one-degree change in temperature could mean icing,” Ms. Samaroden said in an interview. The province’s power market is unique in Canada in that it has no central or Crown power provider. Instead, private companies run the power plants that feed electricity into the grid. The AESO works with industry and the government to manage and plan that market.
The day before, a 300-MW gas-fired plant in Grande Cache, owned by Maxim Power Corp., had tripped offline. Maxim initially thought the outage would be short-lived, but two days later, it was still stuck generating only around 70 MW. Had the report signalled potential scarcity well before, it would have provided a better signal to the market and been less susceptible to sudden shifts based on forecast error and outages, the MSA said.Unlike the January threat to Alberta’s power grid, high demand did not play into April’s rolling blackouts. Instead, the province’s first forced outages since 2013 boiled down to a rapid loss of supply.
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