中文摘要：

蓄电池和超级电容器混合使用，可以充分发挥蓄电池比能量大和超级电容器比功率大、循环寿命长的优点，大大提升了复合电源的性能。建立了蓄电池超级电容器并联的数学模型，定量地分析了复合电源性能的改善及其影响因素。针对独立光伏发电系统的特点，将复合电源储能应用于独立光伏系统中，建立了该系统的仿真模型并设计了相应的控制环节。仿真结果表明：在独立光伏发电系统的发电功率和负载功率脉动的情况下，蓄电池工作在优化的充放电状态，其充放电电流比较平滑，有效地减少了充放电小循环次数。

英文摘要：

Abstract： The ultracapacitor/battery hybrid system integrates the best characteristics of the high energy density of the battery and the long cycle life of the uhracapacitor. The mathematical model of the ultracapacitor/battery hybrid system was set up, and the main characters of it such as the peak power enhancement and the correlative factors were studied and analyzed in this paper. The uhracapacitor/battery hybrid system was put forward and utilized in a standalone Photovohaic （PV） system. The model and control algorithm of the system were developed. The results show that the battery could work in the optimized charge and discharge condition when the PV power and load pow er are pulsating, so that the current of the battery is quite smooth. The small charge and recharge cycles due to irra diation variation can be reduced effectively.