| 引用本文: | 伍文俊,魏选,王文轩,李晓艳.NPC三电平双PWM变换器直流母线电流的重构[J].电力自动化设备,2019,39(10): |
| WU Wenjun,WEI Xuan,WANG Wenxuan,LI Xiaoyan.Reconfiguration of DC bus current for three-level NPC dual-PWM converter[J].Electric Power Automation Equipment,2019,39(10): |
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| 摘要: |
| 基于空间矢量脉宽调制(SVPWM)策略，建立了二极管箝位(NPC)三电平逆变器直流母线电流的高频数学模型。根据有功功率平衡，提出一种直流母线电流的重构方法。从快速傅里叶变换(FFT)和交流侧有功功率2个方面对所提重构方法的误差进行了分析。最后，基于NPC三电平双PWM变换器的前馈控制完成了直流母线电流重构的实验。结果表明所提直流母线电流重构方法可行、有效，且实现简单、计算量较少。 |
| 关键词: NPC三电平变换器 直流母线电流 重构方法 前馈控制 |
| DOI：10.16081/j.epae.201909038 |
| 分类号:TM46;TM721.1 |
| 基金项目:陕西省重点学科专项基金资助项目(105-5X1201) |
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| Reconfiguration of DC bus current for three-level NPC dual-PWM converter |
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WU Wenjun, WEI Xuan, WANG Wenxuan, LI Xiaoyan
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School of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China
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| Abstract: |
| Based on SVPWM(Space Vector Pulse Width Modulation) strategy, a high-frequency mathematical model of DC bus current for three-level NPC(Neutral-Point-Clamped) converter is proposed. According to the balance of active power, a reconstructed method of DC bus current is proposed. The error of the proposed constructed method is analyzed in aspects of FFT(Fast Fourier Transform) and active power at AC side. Finally, the related experiments are completed based on three-level NPC dual-PWM feed-forward control. The results show that the proposed method is feasible and effective, meanwhile it is easy to realize and needs less calculation. |
| Key words: three-level NPC converter DC bus electric current reconstructed method feed-forward control |
