一种非隔离型双Buck光伏并网逆变器研究  

Research on the Non-isolated Dual-Buck Photovoltaic Grid-connected Inverter

作　　者：代云中[1] 张荣飞 王一帆 顾述升 DAI Yun-zhong;ZHANG Rong-fei;WANG Yi-fan;GU Shu-sheng(Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学电气信息学院

出　　处：《电力电子技术》2019年第5期53-56,共4页Power Electronics

基　　金：国家重点研发计划(2016YFF0203400)~~

摘　　要：为了抑制非隔离型光伏并网逆变器(NPGCI)的共模漏电流,提出一种非隔离型双Buck光伏并网逆变器(NDPGI)拓扑。首先,使逆变器处于能使共模电压保持恒定的半周期运行模式。接着,对半周期运行模式下NDPGI的运行模态和共模漏电流进行分析。之后,设计了采用滞环电流控制(HCC)的双Buck光伏并网逆变器系统,通过控制逻辑设计使NDPGI实现半周期运行模式。最后,通过实验验证了NDPGI拓扑结构的合理性及其共模漏电流分析的正确性。To suppress the common-mode leakage current of non-isolated photovoltaic grid-connected inverter(NPGCI),a novel non-isolated dual-Buck photovoltaic grid-connected inverter(NDPGI)topology is proposed.Firstly,a half-cycle operation mode can make the common-mode voltage constant is carried out.Secondly,operating modes and common-mode leakage current of NDPGI in the half-cycle operation mode are analyzed.Thirdly,the dual-Buck photovoltaic grid-connected inverter system with hysteresis current controller(HCC)is designed.Meanwhile,the half-cycle operation mode is achieved by the design of control logic.Finally,the correctness of the novel circuit topology and the analysis of common-mode leakage current are verified by experimental results.

关 键 词：并网逆变器 共模电压 滞环电流控制 

分 类 号：TM464[电气工程—电器]