Computation of transient electromagnetic torque in a turbogenerator under the cases of different sudden short circuits

Author

Renyuan, Tang ; Hu Yan ; Lu Zhanhong ; Shiyou, Yang ; Lijie, Miao

Author_Institution

Shenyang Polytech. Univ., China

Volume

26

Issue

2

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

1042

Lastpage

1045

Abstract

A method for the computation of the transient electromagnetic torque in turbogenerators is given in which the iron saturation and the relative motion of the rotor and stator are taken into account. This method is based on the finite-element computation using a dynamic model coupled with the equations of external electric circuits. To avoid the airgap mesh distortion caused by the movement of the rotor, moving boundaries are introduced in the airgap. An example is given that involves the computation of the distribution of transient magnetic field and the electromagnetic torque of a 200-MW turbo-generator following different types of sudden short-circuits. The computed results agree with the measurements very well

Keywords

finite element analysis; magnetic fields; rotors; short-circuit currents; stators; torque; turbogenerators; 200 MW; Fe saturation; airgap mesh distortion; dynamic model; external electric circuits; finite-element computation; moving boundaries; relative motion; rotor; stator; sudden short circuits; transient electromagnetic torque; transient magnetic field; turbogenerator; Coupling circuits; Distributed computing; Electromagnetic transients; Equations; Finite element methods; Iron; Magnetic field measurement; Stators; Torque; Turbogenerators;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.106499

Filename

106499