新型模块化多电平DC-DC变换器拓扑及其工作机理分析
发布时间：2019-04-28 20:45
【摘要】：针对目前模块化多电平DC-DC变换器拓扑结构及其主要采用的交流平衡控制方法所带来的问题,基于直流控制思想,提出了一种新型模块化多电平DC-DC变换器拓扑。通过重构一种全桥子模块结构,每个子模块电容同时包含两条充放电路径,相邻子模块间通过形成局部的并联支路实现电容间电能传递和电容电压自平衡,避免了子模块电容在单向直流电能变换导致的电压失衡。通过对变换器的平衡机理及其基本工作原理分析、仿真实验验证,结果表明所提出的变换器在直流控制方式下能够稳定运行,子模块电容电压具有自平衡能力,变换器电压变比范围大,具有适用于不同应用场合直流输配电的应用潜力。
[Abstract]:Aiming at the problems caused by the topology structure of modular multilevel DC-DC converter and its main AC balance control methods, a novel modular multilevel DC-DC converter topology is proposed based on DC control idea. By reconstructing a full-bridge sub-module structure, each sub-module capacitor contains two charge-discharge paths at the same time, and the adjacent sub-modules realize the power transfer and capacitance voltage self-balance between capacitors by forming a local parallel branch. The voltage imbalance caused by unidirectional DC power conversion of sub-module capacitors is avoided. Through the analysis of the balance mechanism and the basic working principle of the converter, the simulation results show that the proposed converter can operate stably under the DC control mode, and the capacitor voltage of the sub-module has the ability of self-balancing. The converter has the potential for DC transmission and distribution in different applications because of its wide range of voltage variation.
【作者单位】： 舰船综合电力技术国防科技重点实验室(海军工程大学);
【基金】：国家自然科学基金资助项目(51490681) 国家重点基础研究发展计划(973计划)资助项目(2015CB251004)~~
【分类号】：TM46
[Abstract]:Aiming at the problems caused by the topology structure of modular multilevel DC-DC converter and its main AC balance control methods, a novel modular multilevel DC-DC converter topology is proposed based on DC control idea. By reconstructing a full-bridge sub-module structure, each sub-module capacitor contains two charge-discharge paths at the same time, and the adjacent sub-modules realize the power transfer and capacitance voltage self-balance between capacitors by forming a local parallel branch. The voltage imbalance caused by unidirectional DC power conversion of sub-module capacitors is avoided. Through the analysis of the balance mechanism and the basic working principle of the converter, the simulation results show that the proposed converter can operate stably under the DC control mode, and the capacitor voltage of the sub-module has the ability of self-balancing. The converter has the potential for DC transmission and distribution in different applications because of its wide range of voltage variation.
【作者单位】： 舰船综合电力技术国防科技重点实验室(海军工程大学);
【基金】：国家自然科学基金资助项目(51490681) 国家重点基础研究发展计划(973计划)资助项目(2015CB251004)~~
【分类号】：TM46
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