Straume I. Simulation of electrical machine system with permanent magnet sinchronous generator

Abstract. The research paper discusses dynamic process simulation of electrical machine system with frequency controlled induction motor and permanent magnet exciting synchronous generator under changeable electrical power as a load varying from no-load mode to rated value. Experimental and analytical investigations show that given machine system is a non-stationary inertial object with changeable electromechanical time constant as a function of the rotation speed. A self tuning up model is developed to simulate the transient process of output voltage and frequency change under fluent electrical load. Matlab – Simulink technology enables to simulate non-stationary dynamic process of electrical machine system with high accuracy. Research testifies that using two loop control system the fluctuations of output voltage and frequency can be decreased under required ± 5 % limit