Verfahren zum Schutz einer synchronen Maschine gegen Beschädigung durch Polschlüpfen

Details

Veröffentlichungs-Nr.

EP2453572

Aktenzeichen

EP10460041

Anmeldetag

15. November 2010

Veröffentlichung

13. Februar 2013

Erteilung

13. Februar 2013

Rechtsraum

EP

IPC

H02P9/10

Abstract

The subject of the invention is a method for protecting a synchronous machine (2) against damage caused by pole slipping, applicable during the operation of the synchronous machine in a power generating unit or a drive unit (1) in an electric power network. In the inventive method, measured signals of current and voltage of the synchronous machine (2) and assumed constant parameters are the basis for determining a binary logical indicator of the occurrence of a disturbance (Trig_start), for which the criterion of disturbance occurrence proves to be valid, which when fulfilled means that pole slipping can occur, then a binary logical indicator of pole slipping (PS_det) is determined, for which the criterion of occurrence of a pole slipping proves to be valid for the generator mode or the drive mode, which criterion when fulfilled, the time of rotor operation with the occurrence of pole slipping is totalized, a binary logical indicator of the decision about the trip action is determined (PS_trip), for which the criterion of exceeding a threshold value allowed for the rotor operation with slipping proves to be valid, which when fulfilled, automatically activates measures protecting the synchronous machine (2) against slipping. If, in the course of execution of the disturbance occurrence detection process, after a defined time, the disturbance occurrence criterion is not fulfilled, the process of sudden disturbance detection and/or the process of accrued disturbance detection is conducted, which processes are conducted until the criterion of pole slipping occurrence is fulfilled for the generator mode or for the motor mode, after which further actions are continued as previously.

Anmelder

Firma

ABB Research Ltd.

Land

🇨🇭 Schweiz

Fachgebiete