Effect of Eddy Current Loss on the Performance of Wind Turbine Induction Generator

Abstract

Eddy current losses in wind power generation systems are dissipated as heat, which has a direct impact on the generator's efficiency. Due to the induction generator's poor heat dissipation from the rotor, eddy-current losses may generate substantial heating. A precise combination of the rotor architecture and the lamination dimensions should be employed when developing a wind power induction generator. In addition to material selection, lamination dimensions have a critical role in reducing core losses. The paper shows how to determine the generated power, losses, total energy efficiency, and capacity factor of a wind turbine generation system using a simple and accurate mathematical approach. The proposed work adds to the body of knowledge on eddy current losses by examining different steel lamination thicknesses and rotor heights for a wind power induction generator with a slip range of -0.05 to +0.25 and a B of 1.5 T and a frequency of 50 Hz. This work proposes an analytical tool for estimating the thickness and height of laminations (d and H). The optimal choice of d and H gives excellent efficiency and ensures that the thermal and slip are less than the maximum allowable limits, according to the results. The proposed method was used to examine a 2.2 MW, 50 Hz, 4-pole wind turbine induction generator. When d=0.1 mm and H=0.2 mm, the generator operates with a wide range of slip and is much below the thermal stress limit, resulting in a 96 percent efficiency.
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