MATHEMATICAL MODEL OF AN INDUCTION GENERATOR TAKING INTO ACCOUNT HIGH SATURATION OF THE MAGNETIC SYSTEM

Abstract

Purpose. Development of a mathematical model of transition processes for a detailed study of the harmonic components of the voltage and current of the IG as part of autonomous generator sets at high saturation of the magnetic system. Result. The article presents an analysis of the steady-state mode of a self-excited induction generator based on a mathematical model in a three-phase coordinate system, which makes it possible to take into account the influence on the dynamic characteristics of an asynchronous generator of such physical phenomena as the nonlinearity of the magnetization curve, the phenomenon of hysteresis and eddy currents. The article simulates and evaluates the influence of the value of the connected load on the quality of the generator output voltage. The Fast Fourier transform algorithm is used to analyze the harmonic components of the voltage and current of an induction generator in a steady state. The change in the harmonic coefficient and its compliance with the boundary permissible values are analyzed. The results of experimental studies of an asynchronous generator in an autonomous mode of operation were obtained, and the adequacy of the proposed mathematical model was assessed. Practical value. The carried out theoretical studies of the capacitive self-excitation of IM machines have created a good basis for solving issues related to the practical use of autonomous sources based on an asynchronous generator.