标题:Dual Half-Cycle-Bridges Single-Phase Photovoltaic Inverter
作者:Zhou, Liwei ;Gao, Feng ;Xu, Tao ;Duan, Wen
作者机构:[Zhou, Liwei ;Gao, Feng ;Xu, Tao ;Duan, Wen ] School of Electrical Engineering, Shandong University, Jinan, China
会议名称:7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015
会议日期:20 September 2015 through 24 September 2015
来源:2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015
出版年:2015
页码:2490-2497
DOI:10.1109/ECCE.2015.7310010
关键词:common mode voltage; grid connected inverter; unipolar switching strategy
摘要:In a transformer-less photovoltaic (PV) grid-connected system, there exists a galvanic connection between the grid and the PV array. Without any transformer in the inverter, common-mode leakage currents can flow through the stray capacitance between the PV array and the ground. This paper first analyzes the equivalent common-mode circuit of single-phase inverter, and compares several single-phase inverters with constant common-mode voltage. This paper then proposes a novel dual half-cycle-bridges (DHCB) single-phase PV inverter with low conduction losses. A novel hybrid SPWM modulation method is introduced to achieve the minimum switching losses under any power factor operation. Next, adding a neutral point clamped circuit to the DHCB inverter, the common-mode voltage can be clamped to half of DC voltage firmly. Finally, simulation and experimental results have validated the theoretical findings. © 2015 IEEE.
收录类别:EI;SCOPUS
Scopus被引频次:1
资源类型:会议论文;期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963520605&doi=10.1109%2fECCE.2015.7310010&partnerID=40&md5=08490903dff76902f32a506e609d2851
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