Characteristics of a doubly-fed asynchronous machine and its application in the use of wind energy

Abstract

This paper presents the characteristics of an asynchronous machine with winded rotor, fed both from stator and from rotor side. Mathematical model and the equivalent circuit of this mode of asynchronous machine’s work are defined and expressions for characteristic values are derived. On the basis of the obtained characteristics it is pointed out that this kind of electrical machines, while working in generating mode, may be used in systems where electric power is generated from wind energy. Main characteristics of wind turbine – doubly-fed asynchronous machine system are processed.

U radu su date karakteristike asinhrone mašine sa namotanim rotorom koja se napaja i sa strane statora i sa strane rotora. Definisani su matematički model i ekvivalentna šema ovog režima rada asinhrone mašine i izvedeni su izrazi za karakteristične veličine. Na osnovu dobijenih karakteristika ukazano je na mogućnost korišćenja ove vrste električnih mašina, kada rade u generatorskom režimu rada, u sistemima za generisanje električne energije iz energije vetra i obrađene su osnovne karakteristike sistema vetroturbina – asinhrona mašina sa dvostranim napajanjem.