Impedance design of 21-kW quasi-Z-source H-bridge module for MW-scale medium-voltage cascaded multilevel photovoltaic inverter

Author

Yushan Liu ; Abu-Rub, Haitham ; Baoming Ge ; Fang Zheng Peng

Author_Institution

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

fYear

2014

fDate

1-4 June 2014

Firstpage

2490

Lastpage

2495

Abstract

An impedance parameter design of quasi-Z-source (qZS) H-bridge inverter module applied to megawatt (MW)-scale medium-voltage Photovoltaic (PV) power system is proposed. A double-line-frequency (2ω) voltage and current ripple model of qZS network with PV panel is established. The effects of qZS inductance and capacitance as well as PV panel terminal capacitance on 2ω voltage and current ripples are investigated by using the built model. Elaborate designed prototype parameters are to buffer those low-frequency ripples. Simulations are carried out on a 21-kW single-phase qZS PV inverter to verify the proposed 2ω-ripple model and impedance design method.

Keywords

invertors; photovoltaic power systems; 2ω-ripple; MW-scale medium-voltage inverter; PV panel terminal capacitance; cascaded multilevel photovoltaic inverter; current ripple; double-line-frequency voltage; impedance parameter design; low-frequency ripples; photovoltaic power system; power 21 kW; qZS capacitance; qZS inductance; quasiZ-source H-bridge inverter module; voltage ripples; Capacitance; Capacitors; Impedance; Inductance; Inductors; Inverters; Photovoltaic systems; Low-frequency ripple; photovoltaic power system; quasi-Z-source inverter; single-phase system;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics (ISIE), 2014 IEEE 23rd International Symposium on

Conference_Location

Istanbul

Type

conf

DOI

10.1109/ISIE.2014.6865011

Filename

6865011