摘要
以非隔离型单相光伏系统为研究对象,在单相全桥拓扑基础上提出一种单相四开关多电平光伏逆变器。首先分析系统工作原理,然后建立系统高频共模模型,分析16种开关状态下对应的系统输出电压和共模电压,并针对不同应用场合提出两种调制策略,可以分别实现系统输出电压五电平和共模电压恒定,利用Matlab软件对提出的方案进行仿真研究,最后在TMS320F28335DSP+XC3S400 FPGA数字控制硬件实验平台上对提出方案进行实验验证,结果验证了所提方案的有效性。
The single-phase transformerless photovoltaic(PV)system is investigated in this paper.A new single-phase four-switch multilevel inverter is proposed based on the full-bridge topology.Firstly,the operating principle is analyzed.Secondly,the high-frequency common mode model is established.The corresponding output voltage and common mode voltage corresponding to sixteen switching states are derived.Thirdly,two modulation strategies are presented to achieve the five-level output voltage and constant common mode voltage,depending on the different applications.The proposed solution is tested with Matlab.Finally,the experiments are carried out on the digital control platform with TMS320F28335 DSP and XC3S400 FPGA.The experimental results verify the effectiveness of the proposed solution.
作者
沈虹
郭忠南
关红磊
王宝诚
郭小强
Shen Hong;Guo Zhongnan;Guan Honglei;Wang Baocheng;Guo Xiaoqiang(School of Electrical Engineering Yanshan University,Qinhuangdao 066004 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2018年第8期1775-1782,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51777181)
安徽省工业节电与电能质量控制协同创新中心开放课题基金(KFKT201803)
河北省引进留学人员项目(CL201622)资助
关键词
非隔离型光伏系统
单相多电平逆变器
共模电压
共模漏电流
Transformerless PV system
single-phase multilevel inverter
common mode voltage
common mode leakage current
