Measurements of the currents flowing in the stator frame of a 500 MW turbogenerator
作者:
R.A.Hilliar,
R.J.Jackson,
D.A.Ward,
R.B.Bennett,
期刊:
IEE Proceedings C (Generation, Transmission and Distribution)
(IET Available online 1986)
卷期:
Volume 133,
issue 1
页码: 16-25
年代: 1986
DOI:10.1049/ip-c.1986.0003
出版商: IEE
数据来源: IET
摘要:
The magnetic leakage fields in large turbogenerators produce currents in the steel frame supporting the stator core. This paper describes measurements undertaken to determine the magnitude and distribution of the currents in the stator frame of a particular generator. Currents are produced mainly by the axial magnetic fields impinging on the core end, and vary linearly with the current in the stator winding. The radial current from the stator core end screen (15 kA per pole) flows mainly through flexible links to the stator frame. A simplified theoretical model is described to demonstrate the effect of different link systems. The results highlight the importance of considering in detail the electrical paths provided to accommodate large currents in the core frame, so that overheating at junctions of components of the frame may be avoided.
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