A METHOD AND A DEVICE FOR PURPOSES OF BRAKING AN UNDERWATER POWERPLANT

摘要

The invention relates to a method for operating an underwater power station comprising a water turbine for absorbing kinetic energy from a water current; an electrical generator comprising converter feeding, wherein the generator rotor thereof is connected to the water turbine in a rotationally fixed manner; the invention being characterized by the fact that upon normal operation a first frequency converter is used for converter feeding and that upon deceleration operation at least one second frequency converter or a partial component of a second frequency converters is switched on and is synchronized with the first frequency converter so as to perform a combined converter feeding of the electrical generator, thus creating a generator torque which decelerates the water turbine.