Abstract
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.
| Original language | English |
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| Title of host publication | APEC 2015 - 30th Annual IEEE Applied Power Electronics Conference and Exposition |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 1763-1767 |
| Number of pages | 5 |
| Volume | 2015-May |
| Edition | May |
| DOIs | |
| Publication status | Published - 8 May 2015 |
| Event | 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte, United States Duration: 15 Mar 2015 → 19 Mar 2015 |
Other
| Other | 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 |
|---|---|
| Country | United States |
| City | Charlotte |
| Period | 15/3/15 → 19/3/15 |
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Keywords
- photovoltaic power conversion
- pulsewidth modulation
- quasi-Z-source inverter
- single-phase grid-tie control
ASJC Scopus subject areas
- Electrical and Electronic Engineering