Transformerless DC/AC Converter for Grid-Connected PV Power Generation System

被引：5
|
作者：
Azri, Maaspaliza [1 ,2 ,3 ]
Abd Rahim, Nasrudin [2 ,4 ]
Elias, Mohamad Fathi Mohamad [2 ]
机构：
[1] Univ Teknikal Malaysia Melaka UTeM, Fac Engn, Durian Tunggal 76100, Melaka, Malaysia
[2] Univ Malaya, Power Energy Dedicated Adv Ctr UMPEDAC, Wisma R&D UM, Kuala Lumpur 59990, Malaysia
[3] Univ Malaya, Fac Engn, Kuala Lumpur 50603, Malaysia
[4] King Abdulaziz Univ, Dept Elect & Elect Engn, Jeddah 21511, Saudi Arabia
来源：
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING | 2014年 / 39卷 / 11期
关键词：
Transformerless; Grid-connected inverter; Low ground-leakage current; Constant common-mode voltage; High step-up dc-dc converter; INVERTER; MITIGATION;
D O I：
10.1007/s13369-014-1308-z
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Transformerless photovoltaic (PV) systems have two shortcomings: low voltage not fulfilling load requirement and ground-leakage current flowing through parasitic capacitance between the PV panel and ground. Therefore, a DC/AC converter-a single-phase bipolar sinusoidal pulse width modulation (SPWM) H-Bridge power inverter configuration with a DC/DC high-gain conversion-boosting (CD-Boost) stage-is proposed. Its conversion ratio was compared with a conventional converter's. It provides a high conversion ratio of the PV voltage before the DC is converted into AC for the load. The bipolar SPWM modulation technique is proposed for lower ground-leakage current, and the effectiveness of the proposed modulation technique was compared with the unipolar SPWM technique.The effect of unbalanced filter inductance and of parasitic capacitance on the combined CD-Boost bipolar SPWM H-Bridge converter system was investigated. Simulation and experiment results verified the proposed converter's feasibility in addressing issues of transformerless DC/AC converters in grid-connected PV systems.
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页码：7945 / 7956
页数：12
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