Modeling and Simulation Analysis of Switched Inductor Boost Converter

Aiming at the boost ability of the traditional boost converter in photovoltaic power generation system, the switched inductor structure is embedded in the traditional boost converter. The working mechanism of the converter is analyzed through the state of ON and OFF about power switch device and the relationship between the ratio of boost gain and the periodic duty of switch device is established. The mathematical model of switched inductor Boost converter is established by state space average method. Based on this model, simulation and analysis for different operating frequency of the power switching device is executed. The simulation results show that switched inductor Boost converter not only can have higher boost ability than the traditional Boost converter, but also can make the ripple of the output decreased effectively in high switching frequency to improve the conversion efficiency of converter. Meanwhile, it also proves the rationality and correctness of the model, and provides theoretical support for engineering design.