TY - GEN
T1 - Hybrid pulsewidth modulated single-phase quasi-Z-source grid-tie Photovoltaic power system
AU - Liu, Yushan
AU - Abu-Rub, Haitham
AU - Ge, Baoming
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/5/8
Y1 - 2015/5/8
N2 - A hybrid pulsewidth modulated single-phase quasi-Z-source inverter (qZSI) based grid-tie Photovoltaic (PV) power system is proposed. The hybrid pulsewidth modulation (HPWM) conducts PWM when the required ac output voltage is lower than the dc source voltage, otherwise it performs pulse-amplitude modulation (PAM) for the single-phase qZSI. The low-frequency ripple voltage of dc link is utilized, resulting in reductions of quasi-Z-source inductance and capacitance, as well as power devices' switching actions. Control strategy of the proposed system is further presented to track the maximum power points of the PV panel and to inject the extracted PV power into grid. A grid-tie current controller, combining with the plug-in repetitive control and proportional-resonant regulator, is employed to achieve strong harmonic suppression, fast convergence, and zero tacking error. The system dynamic model is disclosed to design controllers. Simulation and experimental results demonstrate validity of the proposed system.
AB - A hybrid pulsewidth modulated single-phase quasi-Z-source inverter (qZSI) based grid-tie Photovoltaic (PV) power system is proposed. The hybrid pulsewidth modulation (HPWM) conducts PWM when the required ac output voltage is lower than the dc source voltage, otherwise it performs pulse-amplitude modulation (PAM) for the single-phase qZSI. The low-frequency ripple voltage of dc link is utilized, resulting in reductions of quasi-Z-source inductance and capacitance, as well as power devices' switching actions. Control strategy of the proposed system is further presented to track the maximum power points of the PV panel and to inject the extracted PV power into grid. A grid-tie current controller, combining with the plug-in repetitive control and proportional-resonant regulator, is employed to achieve strong harmonic suppression, fast convergence, and zero tacking error. The system dynamic model is disclosed to design controllers. Simulation and experimental results demonstrate validity of the proposed system.
KW - photovoltaic power conversion
KW - pulsewidth modulation
KW - quasi-Z-source inverter
KW - single-phase grid-tie control
UR - http://www.scopus.com/inward/record.url?scp=84937914726&partnerID=8YFLogxK
U2 - 10.1109/APEC.2015.7104585
DO - 10.1109/APEC.2015.7104585
M3 - Conference contribution
AN - SCOPUS:84937914726
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 1763
EP - 1767
BT - APEC 2015 - 30th Annual IEEE Applied Power Electronics Conference and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
Y2 - 15 March 2015 through 19 March 2015
ER -