Electric machine operational modeling utilizing coupled electromagnetic and electric drives simulations
Purpose - The purpose of this research is to develop new techniques for component physical modeling for the dynamic simulation of integrated power systems. Design/methodology/approach - A FE-based phase variable model is proposed so as to achieve fast and accurate simulation. Such a model is established based on the nonlinear transient FE analysis, in order to take into consideration the harmonic effects due to the nonlinear magnetization property, magnetic circuit geometry as well as other design variations. Findings - In the FE-based phase variable model, the inductances are described as functions of the phase angle and the magnitude of winding currents, the rotor position and other operational parameters. They are obtained from the transient FE solutions, stored in tables, and retrieved during the simulation. The FE-based phase variable model is implemented in Simulink in two ways. The first is the equation-based block and the second is the circuit component-based block. The FE-based phase variable models of various electrical components in the power system were studied. This includes various types of rotating machines and transformers. Examination and application examples show the correctness and effectiveness of the proposed operational modeling procedures. Originality/value - The developed FE-based physical phase variable model is as accurate as the full FE model with much faster simulation speed. It will benefit the dynamic simulation of integrated power system. This combination of physical modeling and integrated dynamic simulation is original and represents an added value to the state-of-the-art in this field.
electric machines modelling simulation transformers finite element analysis