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Influence of Ferromagnetic material nonlinearity on asynchronous starting of generator-motor
Author(s): 
Pages: 38-44
Year: Issue:  10
Journal: Electric Machines and Control

Keyword:  pumped storagegenerator-motorasynchronous startingferromagnetic material nonlinearityfinite element methods;
Abstract: Aiming at the ferromagnetic material nonlinearity of generator-motor used for pumped storage in asynchronous starting, the 2-D field-circuit coupling time-stepping finite element model of generator—mo-tor was firstly established. Then, a 286MVA generator-motor was taken as an example, and many key physical quantities of that in asynchronous starting were analyzed, such as rotor speed, armature current and dynamic electromagnetic torque and so on. At last, the influence of ferromagnetic material of genera-tor-motor on asynchronous starting performance was quantitatively researched. Calculation results indicate that, in the no-load and asynchronous starting of generator-motor, the nonlinearity of ferromagnetic mate-rial reduces starting time, but increases the shock of armature current, field current and damping winding current as well as the pulsation of dynamic electromagnetic torque.
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