Modified Quasi-Z-Source Inverter with Model Predictive Control for Constant Common-Mode Voltage

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Abstrakt

The common-mode voltage (CMV) of transformerless inverters in photovoltaic system should be properly addressed. The conventional CMV reduction methods for voltage source inverters should be modified when applied to the quasi-Z-source inverters with shoot-through states. The shoot-through states in a quasi-Z-source inverter may lead to high-frequency harmonics in the CMV, thus inducing severe leakage currents. Hence, this paper analyzes the CMV in the quasi-Z-source inverter. More importantly, a modified quasi-Z-source inverter that can achieve a constant CMV through model predictive control is discussed. Furthermore, redundant switching vectors are added to reduce the computation burden when the model predictive control is adopted. Simulations are presented to validate the CMV reduction methods.
OriginalsprogEngelsk
TitelProceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
Antal sider6
ForlagIEEE Press
Publikationsdatoaug. 2019
Sider32-37
Artikelnummer8797055
ISBN (Trykt)978-1-7281-1612-9
ISBN (Elektronisk)978-89-5708-313-0
StatusUdgivet - aug. 2019
Begivenhed2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) - Busan, Sydkorea
Varighed: 27 maj 201930 maj 2019

Konference

Konference2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
LandSydkorea
ByBusan
Periode27/05/201930/05/2019
NavnInternational Conference on Power Electronics
ISSN2150-6078

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