Two-Stage Transformerless Dual-Buck PV Grid-Connected Inverters with High Efficiency

作     者：Li Zhang Fengkai Jiang Dewei(David)Xu Kai Sun Yongqiang Hao Tao Zhang 

作者机构：College of Energy and Electrical EngineeringHohai UniversityNanjing 211100China Department of Electrical and Computer EngineeringRyerson UniversityToronto M5B 2K3Canada Department of Electrical and EngineeringTsinghua UniversityBeijing 10084China 

出 版 物：《Chinese Journal of Electrical Engineering》 (中国电气工程学报（英文）)

年 卷 期：2018年第4卷第2期

页      面：36-42页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：This work was supported in part by the National Natural Science Foundation of China under Grant 51677054 in part by the 13th Six Talent Peaks Project in Jiangsu Province under Grant XNY-008 

主　　题：Common mode current photovoltaic semi-two-stage inverter transformerless inverter common-ground-type inverter 

摘      要：A semi-two-stage common-ground-type transformerless dual-buck-based grid-connected inverter is proposed in this *** common-ground-type topology can eliminate common mode(CM)leakage current by connecting the negative terminal of the photovoltaic(PV)directly to the neutral point of the grid,which bypasses the PV array’s stray *** dual-buck-based topology guarantees increased robustness since the dc-link cannot be short-circuited by a shoot-through *** semi-two-stage topology features multi-level characteristic,which has a lower forward-voltage drop and smaller dv/*** with the conventional two-stage inverter,the proposed topology achieves higher efficiency and higher *** results of a 1.5kW prototype show that the proposed inverter is able to achieve high efficiency and low leakage currents.