电工技术学报  2016, Vol. 31 Issue (19): 66-73    DOI:
电力电子与电力传动 |
非隔离型三相四桥臂光伏逆变器漏电流抑制研究
郭小强,贺冉,菅佳敏,卢志刚,孙孝峰
河北省电力电子节能与传动控制重点实验室燕山大学 秦皇岛 066004
Leakage Current Reduction for Three-Phase Four-Leg Photovoltaic Inverter
Guo Xiaoqiang, He Ran ,Jian Jiamin, Lu Zhigang, Sun Xiaofeng
Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province Yanshan University Qinhuangdao 066004 China
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摘要 针对非隔离型三相三桥臂光伏逆变器无法有效抑制漏电流的问题,提出基于三相四桥臂拓扑的漏电流解决方案。建立非隔离型三相四桥臂光伏逆变器系统共模模型,分析了影响系统漏电流的主要因素和变量,提出一种基于布尔函数逻辑运算的新型载波调制策略。该调制可以实现共模电压恒定,从而有效抑制漏电流。最后搭建了 TMS320F28335DSP+XC3S400FPGA 数字控制硬件实验平台,对提出的新型载波调制进行了实验研究,并与传统调制方案进行了对比分析,实验结果验证了提出方案的有效性。
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郭小强
贺冉
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卢志刚
孙孝峰
关键词 非隔离型光伏系统三相四桥臂逆变器脉冲宽度调制漏电流    
Abstract:In order to solve the problem of the leakage current in three-phase photovoltaic(PV) inverter systems,a new solution of the leakage current reduction is proposed with the three-phase four-leg PV inverter.The common mode loop model of the transformerless four-leg PV inverter is presented.The effect of different factors and variables on the leakage current is discussed.A new modulation strategy based on Boolean logic function is then proposed to ensure the constant common-mode voltage.And thus the leakage current can be significantly suppressed.Finally the proposed modulation is implemented on the TMS320F28335DSP+XC3S400FPGA digital control hardware platform.And the performance is also presented by comparison with the conventional modulation methods.The experiment results verify the effectiveness of the proposed modulation strategy.
Key wordsTransformerless photovoltaic system    three-phase four-leg inverter    pulse width modulation    leakage current   
收稿日期: 2015-05-31      出版日期: 2016-11-02
PACS: TM315  
基金资助:国家自然科学基金(51307149)、河北省杰出青年基金(2016203133)和中国博士后基金(2015T80230)资助项目。
作者简介: 郭小强 男,1979年生,博士,副教授,IEEE Senior Member,研究方向为多电平变换器、光伏发电和微电网技术。E-mail:gxq@ysu.edu.cn(通信作者)贺 冉 男,1991年生,硕士研究生,研究方向为多电平变换器和光伏发电。E-mail:1015612928@qq.com
引用本文:   
郭小强,贺冉,菅佳敏,卢志刚,孙孝峰. 非隔离型三相四桥臂光伏逆变器漏电流抑制研究[J]. 电工技术学报, 2016, 31(19): 66-73. Guo Xiaoqiang, He Ran ,Jian Jiamin, Lu Zhigang, Sun Xiaofeng. Leakage Current Reduction for Three-Phase Four-Leg Photovoltaic Inverter. Transactions of China Electrotechnical Society, 2016, 31(19): 66-73.
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