单相光伏并网发电系统的NPC三电平逆变器研究  

Research on NPC three-level converter in single phase grid-connected photovoltaic generation system

作　　者：郑晓东 庄肖波[2] 

机构地区：[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

出　　处：《电源技术》2017年第3期432-434,459,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金资助项目(51377074);江苏高校优势学科建设工程资助项目(苏政办发[2011]6号);江苏省研究生创新计划项目(CXZZ13_0683)

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。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.

关 键 词：单相光伏 并网 NPC三电平 逆变器 

分 类 号：TM615[电气工程—电力系统及自动化]