Power cuts have reportedly hit the capital Amsterdam as well.
Schiphol, the country's main international airport, is running on emergency generators, incoming flights are being redirected to Germany, an airport official told Sputnik.
He stressed that "the worst part is behind, the electricity is coming bit by bit."
Railway service in the north of the state has been reportedly disrupted as well.
Reasons for the blackout are currently unknown. TenneT, the company operating Diemen's power station, is currently investigating the causes of the incident, according to a statement on its website.