Comprehensive modeling of single-phase quasi-Z-source photovoltaic inverter to investigate low-frequency voltage and current ripples

Author

Yushan Liu ; Abu-Rub, Haitham ; Baoming Ge ; Dongsen Sun ; Hao Zhang ; Daqiang Bi ; Peng, Fang Zheng

Author_Institution

Sch. of Electr. Eng., Beijing Jiaotong Univ., Beijing, China

fYear

2014

fDate

14-18 Sept. 2014

Firstpage

4226

Lastpage

4231

Abstract

The double-line-frequency (2ω) power ripple of single-phase quasi-Z-source (qZS) Photovoltaic (PV) inverter highly affects the whole system´s design and performance. In this paper, a comprehensive modeling for single-phase qZS PV inverter is proposed, where the 2ω-ripple models of qZS inverter system served by real PV source are established and discussed on cases of with and without PV terminal capacitor. The influences from qZS inductance and capacitance, as well as PV panel terminal capacitance to the 2ω ripples are investigated by using the built models. Simulation and experimental results validate the proposed comprehensive 2ω-ripple models for the qZS-PV inverter.

Keywords

invertors; photovoltaic power systems; 2ω-ripple model; PV panel terminal capacitance; PV terminal capacitor; comprehensive modeling; double-line-frequency power ripple; low-frequency current ripples; low-frequency voltage ripples; qZS capacitance; qZS inductance; qZS inverter system; real PV source; single-phase qZS PV inverter; single-phase quasiZ-source PV inverter; single-phase quasiZ-source photovoltaic inverter; Capacitance; Capacitors; Inductors; Integrated circuit modeling; Inverters; Load modeling; Power system dynamics; ac small-signal model; low-frequency ripple; photovoltaic power system; quasi-Z-source inverter;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2014 IEEE

Conference_Location

Pittsburgh, PA

Type

conf

DOI

10.1109/ECCE.2014.6953976

Filename

6953976