一种带飞跨电容的单相光伏逆变器  

Asingle phase PV inverter with flying capacitor

作　　者：杨晗露 马海啸[1] 蒋天健 郭晨阳 YANG Hanlu;MAHaixiao;JIANG Tianjian;GUO Chenyang(College of Artificial Intelligence,College of Automation,Nanjing University of Posts and Telecommunications,Nanjing Jiangsu 210023,China)

机构地区：[1]南京邮电大学自动化学院人工智能学院,江苏南京210023

出　　处：《电源技术》2024年第1期156-160,共5页Chinese Journal of Power Sources

基　　金：2022年国家级大学生创新训练项目(202210293031Z)。

摘　　要：非隔离型逆变器存在的漏电流会增大系统损耗、产生安全隐患。研究了一种带飞跨电容的新型单相光伏逆变器,由5个开关管、一个飞跨电容和一个滤波器构成,结构简单,易于实现。逆变器交流侧与直流侧共地,可完全消除漏电流。针对该新型单相光伏逆变器,采用一种改进的单极性SPWM技术进行控制,优化了各开关管的控制逻辑,所有开关管只在半周期内高频调制,有利于减少开关管损耗。搭建了逆变器的仿真模型和实验样机,仿真和实验结果验证了理论分析的正确性。The leakage current of non-isolated inverter may increase the system loss and cause potential safety hazards.In this paper,a new single phase photovoltaic inverter with flying capacitor is studied,which is composed of five switches,a flying capacitor and a filter.The structure is simple and easy to implement.The AC side and DC side of the inverter were grounded together,which can completely eliminate the leakage current.An improved unipolar SPWM technology is used to control the new single-phase photovoltaic inverter,and the control logic of each switch is optimized.All switches were modulated at high frequency only in half a cycle,which is conducive to reducing switch loss.The simulation model and experimental prototypes of the inverter were built.The simulation and experimental results verify the correctness of the theoretical analysis.

关 键 词：光伏发电 单相逆变器 飞跨电容 漏电流 SPWM调制法 

分 类 号：TM464[电气工程—电器]