Modulation Technique for Single-Phase Transformerless Photovoltaic Inverters With Reactive Power Capability

被引:70
作者
Freddy, Tan Kheng Suan [1 ]
Lee, June-Hee [2 ]
Moon, Hyun-Cheol [2 ]
Lee, Kyo-Beum [2 ]
Rahim, Nasrudin Abd [3 ,4 ]
机构
[1] Asia Pacific Univ Technol & Innovat, Fac Comp Engn & Technol, Sch Engn, Kuala Lumpur 57000, Malaysia
[2] Ajou Univ, Dept Elect & Comp Engn, Suwon 16499, South Korea
[3] Univ Malaya, UM Power Energy Dedicated Adv Ctr, Kuala Lumpur 59990, Malaysia
[4] King Abdulaziz Univ, Jeddah 23218, Saudi Arabia
基金
新加坡国家研究基金会;
关键词
Modulation technique; reactive power; transformerless; LEAKAGE CURRENT; SYSTEM;
D O I
10.1109/TIE.2017.2686366
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This paper underpins the principles for generating reactive power in single-phase transformerless photovoltaic (PV) inverters. Two mainstream and widely adopted PV inverters are explored, i.e., H5 and HERIC. With conventional modulation techniques, reactive power cannot be realized in H5 and HERIC due to the absence of freewheeling path in negative power region. Based on the study, modulation techniques are proposed to provide bidirectional current path during freewheeling period. With proposed modulation technique, reactive power control is achieved in H5 and HERIC inverters, without any modification on the converter structures. The performances of the proposed modulation techniques are studied via MATLAB simulation and further validated with experimental results.
引用
收藏
页码:6989 / 6999
页数:11
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