US 9,960,659 B2 · Protection of a permanent magnet generator

Abstract

The present invention relates to a protection system with a protection relay and at least one measurement sensor to protect a permanent magnet generator having a plurality of stator windings, each of said stator windings having a first end and a second end. If the stator windings are connected in a wye coupling, they are, in a set of three stator windings, commonly coupled in a star point at the first end of the windings, or if the stator windings are connected in a delta coupling, they are, in a set of three stator windings, commonly connected in a ring to each other. In addition, the at least one measurement sensor is arranged for measuring current through at least one of the stator windings at the star point side or within the ring connection and for communicating with the protection relay. The invention also relates to a method of protecting a permanent magnet generator.

Claims14

Dependent claims

A protection system for protecting a permanent magnet generator with a plurality of sets of stator windings, the protection system comprising:

a protection relay;
and
at least one measurement sensor corresponding to each set of the plurality of sets of stator windings,
wherein each of the plurality of sets of stator windings is connected in at least one of a wye coupling and a delta coupling,
wherein each of the plurality of sets of stator windings is electrically phase shifted in relation to each other, and wherein the protection relay is configured to compensate for the phase shift between the plurality of sets of stator windings,
wherein the protection relay is configured to selectively activate first circuit breakers based on parameters values measured by the at least one measurement sensors.

3 more elements

Dependencies are inferred from the claim text.

Protection of a permanent magnet generator

Life of this patent

Protection of a permanent magnet generator

Life of this patent

Abstract

Claims14