Improved Three-Phase Critical-Mode-Based Soft- Switching Modulation Technique with Low Leakage Current for PV Inverter Application

被引：0

作者：

Huang, Zhengrong ^{[1
]}

Li, Qiang ^{[1
]}

Lee, Fred C. ^{[1
]}

机构：

[1] Virginia Polytech Inst & State Univ, Bradley Dept Elect & Comp Engn, Ctr Power Elect Syst, Blacksburg, VA 24061 USA

来源：

2019 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) | 2019年

关键词：

critical conduction mode (CRM); digital control; high frequency; leakage current; silicon carbide MOSFET; soft switching; three-phase inverter; PWM; LOSSES;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In this paper, an improved three-phase criticalconduction-mode (CRM)-based soft-switching modulation technique is proposed in order to reduce the leakage current for photovoltaic (PV) inverter applications. Soft-switching turn-on is achievable, which is especially beneficial for silicon carbide (SiC)based systems at high switching frequency operation to achieve both high power density and high efficiency. The proposed modulation technique is digitally implemented with one low-cost microcontroller (MCU). The modulation concept is verified in simulations and also experimentally implemented on a SiC-based three-phase bidirectional ac-dc converter prototype. Soft-switching turn-on during CRM and DCM operations is verified. In addition, the experiment results show that at least 89% reduction in the leakage current is achieved with the improved modulation technique.

引用

页码：622 / 628

页数：7

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