双向DC/DC控制器研究 日照区时，光伏发电系统提供负载能量，同时多余的能量通过DC 给蓄电池充电；日影区时，蓄电池通过DC给负载提供能量。-Bidirectional DC/DC controller of photovoltaic power generation system Rizhao area, providing load energy, the excess energy through the DC to charge the battery the shadow area