Three-Level Neutral-Point-Clamped Inverters in Transformerless PV Systems - State of the Art

被引：0
作者：
Sebaaly, Fadia [1 ,2 ]
Kanaan, Hadi Y. [1 ]
Moubayed, Nazih [2 ]
机构：
[1] St Joseph Univ, Fac Engn ESIB, Mar Roukoz, Mkalles, Lebanon
[2] Lebanese Univ, Fac Engn Branch, Tripoli, Lebanon
来源：
2014 17TH IEEE MEDITERRANEAN ELECTROTECHNICAL CONFERENCE (MELECON) | 2014年
关键词：
Multilevel inverter; neutral point clamped inverter; carrier-based modulation; space vector modulation; PV systems; ACTIVE NPC CONVERTER; MULTILEVEL INVERTER; PWM STRATEGY; MODULATION; TOPOLOGIES; BRIDGE;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Nowadays, the three-level neutral point clamped (3L-NPC) inverter has become more attractive among multilevel inverters topologies, especially in transformerless grid connected photovoltaic systems. Due to the unbalance between the two DC load-side capacitor voltages, the development and improvement of such topology were important topics in recent studies. New structures were derived focusing on better distribution of losses, increasing efficiency, decreasing the switching devices losses and the conduction losses. For this reason, seven derived topologies are discussed in this paper and compared among the conventional inverter. In addition, a part of this study focuses on modifying modulation techniques in order to comply with the neutral point fluctuation problem. Several carrier-based PWM and space vector modulation techniques are considered, discussed and compared.
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页码：1 / 7
页数：7
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