一种共地型高增益无变压器光伏逆变器  

Common-ground-type High-gain Transformerless Photovoltaic Inverter

作　　者：殷伟斌 丁一岷 范明 傅进 YIN Weibin;DING Yimin;FAN Ming;FU Jin(State Grid Zhejiang Electric Power Co.,Ltd,Jiaxing 314033,China)

机构地区：[1]国网浙江省电力有限公司,嘉兴314033

出　　处：《电源学报》2024年第2期132-138,共7页Journal of Power Supply

摘　　要：提出一种用于光伏发电的单相无变压器逆变器,其输入端和输出端之间共地,从而消除了光伏系统中的共模电流。同时,该逆变器的电压增益高于传统单相准Z源逆变器。此外,利用薄膜电容使逆变器更可靠,并延长其使用寿命。详细分析了该逆变器的工作原理,最后,搭建了一台140 W的实验样机,在孤岛和并网2种运行模式下验证了所提逆变器拓扑的正确性和控制策略的有效性。A single-phase transformerless inverter for photovoltaic power generation is proposed,which has a com-mon ground between its input and output and thus eliminates the common-mode current in the photovoltaic system.Meanwhile,its voltage gain is higher than that of the traditional single-phase quasi-Z-source inverter.In addition,the use of thin film capacitor makes the inverter more reliable and prolongs its service life.The working principle of this inverter is also analyzed in detail.Finally,a 140 W prototype was built,and results verified the correctness of the proposed in-verter topology and the effectiveness of the control strategy in islanding and grid-connected operation modes.

关 键 词：单相 共模电流 无变压器 Z源逆变器 

分 类 号：TM464[电气工程—电器]