级联储能变换器直流链纹波电流的抑制策略

发布时间：2018-04-06 02:33

本文选题：微网　切入点：储能　出处：《电工技术学报》2014年02期

【摘要】：储能系统既能作为电源,又可以作为负荷,在微网中起着双向调节的重要作用。随着微网中储能技术的应用,级联多电平变换器作为一种新颖的储能功率调节系统(PCS)开始被广泛研究。级联储能变换器的H桥直流链电流包括直流分量与纹波电流分量,纹波电流分量会对电池储能系统性能产生不利影响。论文首先研究了H桥直流链电流中纹波电流形成的机理,建立了H桥纹波电流电路模型,研究了直流链纹波电流的传输特性与影响因素;在此基础上提出了基于直流有源滤波器(DC-APF)的级联储能变换器电路拓扑,研究了利用直流有源滤波器抑制H桥直流链纹波电流的控制策略,最后通过仿真显示了该方法的有效性。
[Abstract]:Energy storage system can be used as both power supply and load, which plays an important role in bidirectional regulation in microgrid.With the application of energy storage technology in microgrid, cascaded multilevel converters have been widely studied as a novel energy storage power regulation system (PCS).The H-bridge DC chain current of cascaded energy storage converter consists of DC component and ripple current component, and the ripple current component will adversely affect the performance of battery energy storage system.Firstly, the mechanism of ripple current formation in H bridge DC chain current is studied, the circuit model of H bridge ripple current is established, and the transmission characteristics and influencing factors of DC chain ripple current are studied.On this basis, the topology of cascaded energy storage converter based on DC active filter (DC / APF) is proposed, and the control strategy of suppressing the ripple current of H bridge DC chain by using DC active power filter is studied. Finally, the effectiveness of the method is demonstrated by simulation.
【作者单位】：安徽省新能源利用与节能重点实验室(合肥工业大学);
【基金】：国家高技术研究发展计划(863计划)(2011AA05A107) 国家自然科学基金重点项目(50837001) 高等学校博士学科点专项科研基金(20100111110017)资助项目
【分类号】：TM46

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