Characterising the d-axis machine model of a turbogenerator using finite elements

An analysis of a long established fundamental assumption is presented. The assumption that superposition is valid in frequency response derived models is shown to be wrong, because eddy current losses in the solid rotor cannot be superimposed in the machine direct-axis. This implies that network the...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on energy conversion Vol. 14; no. 3; pp. 340 - 346
Main Authors Arjona L., M.A., MacDonald, D.C.
Format Journal Article
LanguageEnglish
Published IEEE 01.09.1999
Subjects
Computer simulation
Damper windings
Damping
Eddy current testing
Eddy currents
Finite element method
Finite element methods
Frequency dependence
Frequency response
Machine windings
Mathematical analysis
Mathematical models
Shock absorbers
Solid modeling
Turbines
Turbogenerators
Online AccessGet full text

Cover

More Information
Summary:An analysis of a long established fundamental assumption is presented. The assumption that superposition is valid in frequency response derived models is shown to be wrong, because eddy current losses in the solid rotor cannot be superimposed in the machine direct-axis. This implies that network theory is not valid in characterising the d-axis machine model. A machine model structure with one damper winding in the d-axis is derived from finite element analysis. Unequal mutual inductances in the machine d-axis are determined and hence the so-called differential leakage inductances are found and they are frequency dependent. The study is made on a 150 MVA turbine generator by simulating the standstill frequency response test with finite elements.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0885-8969
1558-0059
DOI:10.1109/60.790880