超级电容器储能系统电压均衡技术研究

发布时间：2018-01-09 02:15

本文关键词：超级电容器储能系统电压均衡技术研究　出处：《辽宁工程技术大学》2014年硕士论文　论文类型：学位论文

【摘要】：超级电容作为一种绿色环保的的储能元器件,其具有充放电速度快、反复使用次数多等优点。由于超级电容器的额定电压相对较低,在使用时难免要串联起来以来满足外围电路对电压的要求。由于超级电容在制造过程中所引发的容量偏差、漏电流和日常应用中造成等效串联电阻的存在会造成超级电容组中的单体电压不均衡。超级电容器组中的单体电压不相等则会降低超级电容器的寿命以及降低超级电容器的能量利用率。介绍了现在常用的电压均衡的方法,分析了常用电压均衡方法存在的优缺点。研究了三种基于电压倍增器的超级电容器的电压均衡方法,分析电压倍增器将交变电压电流平均分配给超级电容器,从而实现超级电容储能系统的电压重新进行分配的原理,以及使用变换器获得交变电压电流的原理。针对三种均衡电路分析了三种电路中每个电路的工作模态,利用能量转移方法和电容器的充放电规律推导出均衡电路的直流等效电路,直流等效电路能清晰的反映出了电路均衡原理,仿真与实验结果很好的验证了理论推导的正确性,同时反映了电路拓扑结构简单、电压均衡精度高等优点。
[Abstract]:As a kind of green energy storage component, super capacitor has the advantages of fast charge and discharge speed, many times of repeated use, etc. Because the rated voltage of super capacitor is relatively low. In use, it is inevitable to meet the voltage requirements of peripheral circuits since they are connected in series. Because of the capacity deviation caused by super capacitors in the manufacturing process. Leakage current and the existence of equivalent series resistance in daily application will lead to the unbalance of the single voltage in the supercapacitor group. The difference of the single voltage in the supercapacitor bank will reduce the life of the supercapacitor and reduce the super capacitor. The energy utilization ratio of stage A capacitor. The current voltage equalization method is introduced. The advantages and disadvantages of common voltage equalization methods are analyzed. Three voltage equalization methods based on voltage multiplier are studied. The voltage multiplier distributes voltage and current equally to supercapacitors. The principle of voltage redistribution in super capacitor energy storage system and the principle of obtaining alternating voltage and current by converter are realized. The working modes of each of the three equalization circuits are analyzed. The DC equivalent circuit of the equalization circuit is deduced by using the energy transfer method and the charge and discharge law of the capacitor. The DC equivalent circuit can clearly reflect the principle of the circuit equalization. The simulation and experimental results verify the correctness of the theory and reflect the advantages of simple topology and high precision of voltage equalization.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM53

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