| 基于交错断续空间矢量调制的并联PWM变流器控制策略 |
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| 引用本文： | 温春雪,李建林,朱晓光,许洪华.基于交错断续空间矢量调制的并联PWM变流器控制策略[J].电工技术学报,2009,24(10). |
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| 作者姓名： | 温春雪 李建林 朱晓光 许洪华 |
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| 作者单位： | 1. 北方工业大学机电工程学院,北京,100144
2. 中国科学院电工研究所,北京,100190 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 并联PWM变流器可以显著增大变流器的容量并提高交流侧的电能质量,但是变流器的直接并联容易在其内部产生环流,从而导致变流器损耗增加甚至开关器件损坏.本文以三相PWM整流器并联系统为例给出了环流的数学模型,该环流是一个存在于零轴的带直流偏移量的环流.针对环流问题,本文通过建立并联系统的小信号模型分析确定了零序电流环的设计,并采用了交错断续空间矢量调制方法来消除和抑制其对整个系统的影响.通过该方法,环流可以用dq轴分量表示,并通过功率因数校正(PFC)电路的电流环加以抑制.最后的仿真和实验验证了本文控制策略的有效性.
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| 关 键 词： | 环流 交错断续空间矢量调制 并联PWM变流器 零序电流 |
Control Strategy for Parallel PWM Converters With Interleaved Discontinuous Space-Vector Modulation |
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| Wen Chunxue,Li Jianlin,Zhu Xiaoguang,Xu Honghua.Control Strategy for Parallel PWM Converters With Interleaved Discontinuous Space-Vector Modulation[J].Transactions of China Electrotechnical Society,2009,24(10). |
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| Authors: | Wen Chunxue Li Jianlin Zhu Xiaoguang Xu Honghua |
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| Affiliation: | Wen Chunxue1,2 Li Jianlin1 Zhu Xiaoguang1 Xu Honghua1 (1.Institute of Electrical Engineering Chinese Academic Sciences Beijing 100190 China 2.Graduate University of Chinese Academy of Sciences Beijing 100049 China) |
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| Abstract: | Parallel PWM converter can significantly increase the capacity of the converter and improve the power quality of AC side, but the circulation which can lead to high switching loss and even damage the devices will easily exist in the direct parallel converters. In this paper, the circulation mathematical model of three-phase PWM rectifier parallel system is shown, and the circulation is a zero-axis circulating current with the DC offset. To address the circulation problem, a small signal model is established... |
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| Keywords: | Circulation interleaved discontinuous space-vector modulation (IDSVM) parallel PWM converters zero-sequence current |
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