Modelling and Analysis of Self Excited Induction Generator in Wind Power Generating System

Generation of pollution free power has become the main aim of the researchers in the field of electrical power generation. Self-Excited Induction Generators (SEIG) used for wind energy conversion in remote and rural areas due to many advantages as standalone induction generator over Grid Connected Induction Generators. However, poor voltage and frequency regulation under varying load and speed is the prime drawbacks of standalone SEIG. Nowadays, modelling is the basic tool for analysis, such as optimization, project, design and control. Steady state analysis for such machines is important to understand their behavior under varying operating conditions. This paper presents a d-q model of SEIG using Matlab/Simulink which put in to the development of SEIG modeling with a limited difficulty. From the sweeping d-q model, the effect of different constraints such as, variation of prime mover speed, and excitation capacitor bank size, on the SEIG output built up process have been addressed and analyzed. The variation of the magnetizing inductance and the non-linearity is also considered in this paper.