| 单相光伏并网发电系统的NPC三电平逆变器研究 |
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| 引用本文： | 郑晓东,庄肖波.单相光伏并网发电系统的NPC三电平逆变器研究[J].电源技术,2017,41(3). |
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| 作者姓名： | 郑晓东 庄肖波 |
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| 作者单位： | 1. 镇江比太系统工程有限公司,江苏镇江,212003;2. 江苏大学农业工程研究院,江苏镇江,212013 |
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| 基金项目： | 国家自然科学基金资助项目，江苏高校优势学科建设工程资助项目，江苏省研究生创新计划项目 |
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| 摘 要： | 为提高单相光伏并网发电系统的功率因素和输出电压电能质量,降低逆变器单位功率的成本和谐波含量,提高系统的灵活性,提出了一种NPC三电平单相光伏并网逆变器。分析了NPC型三电平的工作原理,研究了NPC型三电平直流侧中点电位不平衡问题,采用空间矢量控制的SVPWM方法对逆变器进行控制。基于MATLAB/SIMULINK仿真环境,建立了NPC三电平SVPWM控制的单相光伏并网发电系统,仿真结果验证了逆变器及控制策略的有效性。
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| 关 键 词： | 单相光伏 并网 NPC三电平 逆变器 |
Research on NPC three-level converter in single phase grid-connected photovoltaic generation system |
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| ZHENG Xiao-dong,ZHUANG Xiao-bo.Research on NPC three-level converter in single phase grid-connected photovoltaic generation system[J].Chinese Journal of Power Sources,2017,41(3). |
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| Authors: | ZHENG Xiao-dong ZHUANG Xiao-bo |
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| Abstract: | In order to enhance the power factor and output voltage quality of electric energy,reduce the cost of unit power and harmonic content,a NPC three-level converter was introduced to improve the flexibility of in single phase grid-connected photovoltaic generation system.The working principle of NPC three-level converter was analyzed and the neutral point unbalance problem of DC side was researched.About the control method of converter,the SVPWM control strategy was selected.The single phase grid-connected photovoltaic generation system with NPC three-level converter controlled by SVPWM was established under MATLAB/SIMULINK.The simulation results verify the effectiveness of NPC three-level converter and control strategy. |
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| Keywords: | single phase photovoltaic grid-connected NPC three-level converter |
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