一种基于混合储能的独立光伏发电系统

Stand-alone photovoltaic power system based on hybrid energy storage

针对目前采用铅酸蓄电池储能的光伏发电系统最大功率跟踪(MPPT)与优化蓄电池充放电过程往往不能兼顾的问题,设计了一种基于超级电容与铅酸蓄电池混合储能的独立光伏发电系统。介绍了该系统的结构,分析了能量管理方案,结合恒压法与变步长电导增量法改进了MPPT算法,实验结果证明了该系统的可行性。

At present, maximum power point tracking（MPPT） and the charge/discharge process optimization of battery cannot be given overall consideration at the same time in the photovoltaic power system with lead acid storage battery. In this paper, a hybrid energy storage stand-alone photovoltaic power system composed of super-capacitors and lead acid storage batteries was presented. The construction of the system was given, the scheme of the energy management was analyzed and the MPPT was improved based on the constant voltage and variable step long conductivity incremental approaches. The experimental result shows the feasibility of the proposed system.