期刊
ENERGIES
卷 12, 期 13, 页码 -出版社
MDPI
DOI: 10.3390/en12132509
关键词
DC-AC converters; efficiency; neutral-point-clamped inverter; PV applications; PV inverters; PV systems; quasi-z-source; two-level inverter; three-level inverter; converter topologies
资金
- European Regional Development Fund
- programme Mobilitas Pluss - Estonian Research Council [MOBJD126]
- Estonian Research Council [PUT1443]
- Estonian Centre of Excellence in Zero Energy and Resource Efficient Smart Buildings and Districts (ZEBE) - European Regional Development Fund [2014-2020.4.01.15-0016]
The paper presents a comparative study of two solar string inverters based on the Quasi-Z-Source (QZS) network. The first solution comprises a full-SiC two-level QZS inverter, while the second design was built based on a three-level neutral-point-clamped QZS inverter with Silicon based Metal-Oxide-Semiconductor Field-Effect Transistors (Si MOSFETs). Several criteria were taken into consideration: the size of passive elements, thermal design and size of heatsinks, voltage stress across semiconductors, and efficiency investigation. The Photovoltaic (PV)-string rated at 1.8 kW power was selected as a case study system. The advantages and drawbacks of both solutions are presented along with conclusions.
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