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Fast calculation of field currents and reactances for doubly fed generators with rotor duct pieces
- Source :
- IEEE Transactions on Magnetics. Nov, 2006, Vol. 42 Issue 11, p3730, 7 p.
- Publication Year :
- 2006
-
Abstract
- Doubly fed generators have been used as adjustable-speed pumped-storage generator motors and wind turbine generators. Accurate determination of field currents and reactances is important for the design of these machines. We propose a calculation method to obtain the field currents and reactances of machines with rotor duct pieces under any steady-state balanced load condition. The method links two-dimensional static finite-element analysis (FEA) with an approximate calculation to consider three-dimensional (3-D) skin effect in the duct pieces. Its advantage is that the computational time is much smaller than 3-D transient FEA when the slip frequency is not zero. The method will contribute to improvement of the design of doubly fed generators with rotor duct pieces. It was applied to a 395 MVA machine, and the calculated field currents agreed well with the measurements. Variation in the reactances due to saturation is also discussed. Index Terms--Adjustable-speed pumped storage system, cross magnetization, finite-element method, inductance, skin effect, slip.
Details
- Language :
- English
- ISSN :
- 00189464
- Volume :
- 42
- Issue :
- 11
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.154004776