Just before 9 p.m. on Wednesday, the grid alert that had been previously issued by the Alberta Electric System Operator (AESO), was ended.

"We have returned to normal market conditions. Thank you for your conservation efforts tonight," AESO stated.

Earlier in the evening, AESO triggered a Grid Alert, 'due to unexpected generation loss.'

"The AESO issues a Grid Alert when the power system is under stress and we’re preparing to use emergency reserves to meet demand and maintain system reliability," AESO states on its website.

Consumers are asked to reduce their electricity use during Grid Alerts to help mitigate the possibility of undertaking more serious emergency measures to balance the system, including rotating power outages.

In January, the province faced several consecutive grid alerts. 

AESO added that grid alerts can happen for a variety of reasons, including, extremely cold or hot weather, which drives increased use of heating or air conditioning systems, time of day and wind conditions, which impact the availability of solar and wind-generated energy, as well as unplanned generation facility outages.

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