| 引用本文: | 高志刚,冬 雷,廖晓钟,庄亚平,周德佳.一种新型四象限多电平变流器[J].电力自动化设备,2013,33(6): |
| GAO Zhigang,DONG Lei,LIAO Xiaozhong,ZHUANG Yaping,ZHOU Dejia.Four-quad multilevel converter[J].Electric Power Automation Equipment,2013,33(6): |
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| 摘要: |
| 提出了一种新型四象限多电平变流器拓扑结构，由级联H桥型整流器、中频变压器和级联H桥型逆变器三部分构成。建立了变流器的能量传输模型，提出了相应的控制方法和调制策略；分析了输入侧变换器的输出电压模型，给出了相应的调制算法流程。阐述了各中频H桥的工作相位的作用，即达到了控制各电容电压平衡的目的，实现了变流器的四象限运行。实验结果验证了拓扑结构和控制方法的正确性。所提变流器拓扑结构省去了传统的工频变压器，降低了变换器体积和重量，可以应用于高压大容量场合。 |
| 关键词: 变流器 中频变压器 H桥 载波相移 电压控制 |
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| Four-quad multilevel converter |
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GAO Zhigang1, DONG Lei1, LIAO Xiaozhong1, ZHUANG Yaping2, ZHOU Dejia2
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1.Beijing Institute of Technology，Beijing 100081，China;2.Naval Academy of Armament，Beijing 100073，China
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| Abstract: |
| A four-quad multilevel converter topology is proposed，which is composed of H-bridge rectifier，middle-frequency transformer and cascaded H-bridge inverter. The power flow model of converter is established，and its control algorithm and modulation strategy are presented. The output voltage model of input-side converter is analyzed and the corresponding modulation strategy is proposed. The working phase of each middle-frequency H-bridge is described，which functions to keep the voltage balance for each capacitor and realize the four-quad operation of converter. The experimental result validates the correctness of the proposed topology and algorithm. Without the power frequency transformer，the proposed converter has small size and weight，and is applicable in high-voltage large-capacity condition. |
| Key words: electric converters middle-frequency transformer H-bridge carrier phase shifting voltage control |
