A “significant event” involving the Maritime Link system led to a series of power outages in Newfoundland on Monday morning, according to Newfoundland and Labrador Hydro.
In a statement to CBC News, the company said the outages occurred after it exported power to Nova Scotia.
About 57,000 customers lost power, most of them restored within 16 minutes, the company said.
“After the Maritime Link was curtailed following planned exports to Nova Scotia, it experienced significant power swings which resulted in system frequency oscillations,” the company said in an email. at CBC News. “This caused the island’s underfrequency load shedding system to activate, resulting in widely dispersed customer outages.”
The company tweeted about the issue just after 7 a.m., but provided few details about the issue.
By 9:30 a.m., the company said, power had been restored.
The Maritime Link carries hydroelectric power from Cape Ray to Point Aconi in Cape Breton over 180 kilometers of undersea cables. The $1.52 billion link is part of the Muskrat Falls project.
Electricity was transmitted for the first time on the link between NL. and Nova Scotia in 2017. This was the first time Newfoundland was connected to the North American energy grid.
NL Hydro says it is still investigating what happened.