| 引用本文: | 张亚玉,苏建徽,王其兵.大功率电流源型变频器共模电压研究[J].电力自动化设备,2011,31(10): |
| ZHANG Yayu,SU Jianhui,WANG Qibing.Study of common-mode voltage in high-power current source converter[J].Electric Power Automation Equipment,2011,31(10): |
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| 摘要: |
| 为了解决电流源型变频器中存在共模电压的问题，提出了一种采用一体化直流电抗器的方法。该方法在传统电流型变频器的直流环节加入共模电感，以减小系统的共模电流和共模电压。对采用一体化电抗器的3种电流源型变频器的共模电压进行了系统分析，并对一体化直流电抗器的共模电感值进行选择。其中将整流器侧电容中性点与逆变器侧电容中性点连接在一起时，共模电压和共模电流都得到了明显抑制，降低了共模噪声对电机的影响。由于省去了用于抑制共模电压的隔离变压器，这种结构使得变频调速系统结构简单，运输方便，成本降低。仿真结果说明了分析的正确性。 |
| 关键词: 变频器 电流源型变频器 共模电压 电抗器 一体化直流电抗器 电路拓扑 |
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| Study of common-mode voltage in high-power current source converter |
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ZHANG Yayu, SU Jianhui, WANG Qibing
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Energy Institute，Research Center for Photovoltaic System Engineering Ministry of Education，Hefei University of Technology，Hefei 230009，China
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| Abstract: |
| It is proposed to add an integrated DC link reactor into the DC sect of traditional current source converter to reduce its common-mode voltage. The common-mode voltage of current source converter with integrated DC link reactor is analyzed for three topologies and the appropriate value of common-mode inductance is chosen. When the neutral point of capacitor at rectifier side and that at inverter side are connected together，the common-mode voltage and current are well restrained. As the isolation transformer is cancelled，the proposed current source converter is simple and cheap. Simulative results verify the correctness of the theoretical analysis. |
| Key words: electric converters current source converter common-mode voltage electric reactors integrated DC link reactor electric network topology |
