UTILITIES: 4-year rate increase approved for Xcel Energy's N.D. customers Published: Friday, February 28, 2014 Xcel Energy has gotten state regulatory approval for a four-year rate hike on its North Dakota electricity customers. Please subscribe to EnergyWire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.