| 一种新型的无变压器级联型多电平变换器拓扑 |
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| 引用本文： | 王奎,郑泽东,李永东. 一种新型的无变压器级联型多电平变换器拓扑[J]. 电工技术学报, 2011, 0(8): 1-6 |
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| 作者姓名： | 王奎 郑泽东 李永东 |
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| 作者单位： | 清华大学电机系电力系统及发电设备控制和仿真国家重点实验室; |
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| 基金项目： | 国家863高新技术基金资助项目(2007AA05Z264) |
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| 摘 要： | H桥级联多电平逆变器在高压大容量变频调速领域得到了广泛的应用,其最大的不足之处是必须使用庞大、复杂而昂贵的多绕组移相隔离变压器。为了省去传统H桥级联多电平变换器中的多绕组移相变压器,提出了一种新型的无变压器级联型多电平变换器拓扑结构。该拓扑由通用拓扑结构派生而来,全部由基本单元级联而成,不需要大量独立直流电源,省去了多绕组移相隔离变压器,具有模块性强、结构简单、易于扩展等优点。和现有的主要多电平拓扑结构相比,随着电平数的增多,使用元件较少,更适合于五电平及以上多电平使用。以五电平拓扑为例进行了研究,分析了其工作原理和悬浮电容电压平衡控制方法,仿真和实验结果验证了其可行性。
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| 关 键 词： | 多电平变换器 无变压器拓扑 基本单元 级联 悬浮电容 |
A Novel Transformerless Cascaded Multilevel Converter Topology |
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| Wang Kui Zheng Zedong Li Yongdong. A Novel Transformerless Cascaded Multilevel Converter Topology[J]. Transactions of China Electrotechnical Society, 2011, 0(8): 1-6 |
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| Authors: | Wang Kui Zheng Zedong Li Yongdong |
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| Affiliation: | Wang Kui Zheng Zedong Li Yongdong(State Key Lab of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing 100084 China) |
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| Abstract: | Cascaded H-bridge multilevel inverter is widely used in high-voltage high-power motor drivers.The biggest shortage is the use of multi-winding transformer which is bulk,complex and expensive.In order to eliminate the multi-winding transformer of the traditional cascaded H-bridge inverter,a novel transformerless cascaded multilevel converter is proposed in this paper.It's derived from the generalized multilevel inverter topology and consists of a number of cascaded basic cells.All the dc capacitors are float... |
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| Keywords: | Multilevel converter transformerless topology basic cell cascaded floating capacitor |
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