Dynamic Modeling of Six Pulse Rectifier Using MATLAB

A dynamic modeling of thyristor rectifier which is useful for the study of power electronics controlled rectifiers with the help of using MATLAB and SIMULINK is presented in this paper. This dynamic model is very simple, fast and effective simulation method for the output variables of thyristor rectifiers. The rectifier output voltage static and dynamic variables behavior are represented by an accurate non linear function of the pulse number (p), trigger angle control voltage () and displacement angle (). And also it allows the study in open and closed loop thyristor rectifier simulation of loads which are fed by high power thyristor rectifiers with any pulse number greater than one (pgreater than1) or their association by solving only the differential equation (s) of the load (s). The simulation time is always small and independent of the pulse number. This paper gives an approach to establish a general pulse (pgreater than1) thyristor rectifier dynamic model which is based on the steady state rectifier behavior and corrected to accurately represent its dynamic transients. In this paper we considered only null commutating reactances having instantaneous switching, no conduction loss and zero overlap angle.