基于Cuk变换器的光伏脉冲充电系统

Cuk Converter Based on Photovoltaic Charging System

分析了Buck变换器和Boost变换器在离网型光伏发电系统最大功率点跟踪(MPPT)电路中的缺点,提出了一种基于Cuk变换器的蓄电池组脉冲充电电路,并分析了该电路的工作原理,整个系统采用PIC单片机进行控制。实验结果表明,该控制电路实现了对蓄电池的脉冲充电,与Buck变换器、Boost变换器相比,大大提高了整个系统的工作效率,为太阳能的高效利用提供了有效的解决方法。

This paper analyzes the shortcomings of the Buck and Boost converter applied in the MPPT circuit.It also presents a based Cuk converter battery charging circuit controlled by PIC microcontroller for stand-alone photovohaic power generation.Experimental result shows that it uses the pulse charging method to charge the battery,which can improve great system efficiency compared with Buck and Boost converter.