Centralized PV system based on interleaved boost converters

WANG Xiao-kun，LI Yu-ling
（College of Electrical Engineering， Zhejiang University， Hangzhou 310027， China）

Abstract： Aiming at reducing the power losses caused by power fluctuation for photovoltaic power generation system and improving the power quality and efficiency of the PV system，the interleaved boost converters were adopted in centralized photovoltaic system. On the basis of analysis of PV power generation system with interleaved boost operating characteristics，the mathematical model of interleaved boost based on state-space equation was established to design reasonable compensation block and improve the system steady-state and dynamic performance. Simulation and experimental results indicate that an overall reduction of current ripple amplitude and inductor size as well as high frequency of current ripple can be achieved in centralized system with interleaved boost. Low current device can be used in high power application. The high power density and high stability of the system can be obtained.
Key words： interleaved； boost circuit； centralized PV power generation system； state-space equation