The paper is dedicated to the realization of the structural model of the pulse-phase control system (PPCS) of the thyristor voltage regulator (TVR) with an active-inductive (RL) load in the medium of "MATLAB 6.0" ® Describing the possibilities of "MATLAB 6.0" ® in the dynamic systems simulation, some problems connected with the use of special instrument means, included in structure of Toolbox Simulink Library, are examined.