Wind_Energy_Essentials_Lecture 4

Mohan 2010 vwf vgrid 21 i power transformers copyright

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Unformatted text preview: 0 23 Generator Basics: 161 kV V 0 Time Low-Voltage Ride-Through 0 690V 10 60 Hz Generator 690V 34.5 kV 60 Hz 24 Power Electronics Electronics Converters © Copyright N. Mohan 2010 Electro-Mechanical Energy Conversion: Electrical System Electrical Mechanical System Machine Motoring mode Pelec Pmech Pelec Generating mode Pmech © Copyright N. Mohan 2010 25 Types of Generators Permanent-Magnets AC (PMAC) Generators Induction (Asynchronous) Generators Squirrel-Cage Wound-rotor (doubly-fed) © Copyright N. Mohan 2010 26 Basic Principles Electromagnetic Force: external B field f em f em subtract add resultant f em i B [ Nm ] © Copyright N. Mohan 2010 [T ] [ A] [ m ] 27 Induced Voltage: B (into paper) fq u fq e l B [V ] u [T ] [ m ][ m / s ] © Copyright N. Mohan 2010 28 Basic Basic Structure: Stator Air gap Rotor © Copyright N. Mohan 2010 29 Three-Phase Stator Windings: Windings: © Copyright N. Mohan 2010 30 PMAC Generator: http://www.ece.umn.edu/users/riaz/animations/alternator.html © Copyright N. Mohan 2010 31 Induction Machines wit...
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This note was uploaded on 02/26/2011 for the course EE 523 taught by Professor Dr.hopkins during the Spring '11 term at SUNY Buffalo.

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