We have received a number of messages from across Grantham regarding power cuts.
People say they have been hit by up to a dozen cuts which last about a second.
Some say it is only a flicker in the lights while others have seen their computers shut down.
The extensive area includes High Street, London Road, Rycroft Street. Harlaxton Road, Springfield Road and streets between.
Western Power Distribution says normal service should be normal by 4.30pm.