Self excitation in dual stator winding induction generator for renewable energy generation

Abstract

In this paper modelling and analysis of self excited dual stator winding induction generator (DSWIG) with a new method 'fzero algorithm' has been done. We develop the steadystate model of a dual three self-excited induction generator for stand-alone renewable generation dispenses with the segregating real and imaginary components of the complex impedance of the induction generator. Steady state performances and characteristics of different configurations are clearly examined and compared. The analytical results are found to be in good agreement with experimental results.

Study of Induction Generators Performance of Two-Speed Used in Standalone Wind Turbines

“…# : the ratio between no load current and nominal current for generator . Notes from the equation 13 that the necessary capacity for excitation related to several factors, it is proportional to the power of generator P t , and inversely with both the frequency (speed ) and a square of voltage , [4], and proportional to tan z & tan y ( inversely with cos z & cos y ),this means that the power of capacitors that used with induction generators increases with increasing its power and fall down with falling down both voltage and frequency [2] [12].…”

“…The goal of these tests is to get the equivalent circuit parameters for two-speed induction machine [4][9] [13].…”

“…The goal of this practical tests is to determine the true of rotation speed when reach it , induction machine begins work as a generator, and determine capacity of capacitors that required to secure the nominal voltage at different rotation speeds Moreover, these tests are designed to get the external characteristics of the induction generator, in another meaning to get a curved relationship between change of terminal voltage of machine and the value of load that connected with it [4].…”