Abstract
The paper presents a hybrid time-frequency model, which is a combination of two types of models are typically used in a modern computer simulation of power systems: time domain models and frequency domain models. To simulate the nonlinear part of the system a Simulink time domain model of each nonlinear element is used, while the simulation of the linear part of the system is performed using a frequency domain model of the system applied in PCFLO. A well-designed programming interface allows seamless data exchange between the two environments and provides control over the simulation process. It is shown how the hybrid model compares to the time and frequency domain models using a 20 bus power supplying system with nonlinear loads (6-pulse rectifies). The comparison allows to examine the convergence and efficiency of the developed hybrid model and determine the directions for its further improvement.
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