Abstract
Transient Simulations with the detailed model of PWM converters are computationally expensive because there are a considerable number of switching events to be dealt with. As an alternative, average-value modeling is an effective technique for transient studies of power systems containing power electronic converters when the detail of switching is not a major concern. This paper develops an average-value model (AVM) of the photovoltaic (PV) generation system, which contains a DC-AC inverter and a boost converter. The average-value modeling of boost converter is challenging since the analytical AVM of boost converter under the continuous conduction mode (CCM) and discontinuous conduction mode (DCM) are different. A parametric approach is introduced, which enables the AVM of boost converter to accurately simulate both the CCM and DCM. A PV generation system is simulated in MATLAB/Simulink to evaluate the effectiveness of the proposed model. The simulation results indicate that compared with the detailed model, the AVM improves the efficiency of simulation while still accurately predicts the transient behavior of the PV generation system.
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