Quasi-Z source inverter with battery based PV power generation system

Author

Li, Fenglin ; Ge, Baoming ; Sun, Dongsen ; Bi, Daqiang ; Peng, Fang Zheng ; Haitham, Abu Rub

Author_Institution

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

fYear

2011

fDate

20-23 Aug. 2011

Firstpage

1

Lastpage

5

Abstract

A new PV power generation topology, based on the quasi-Z source inverter (QZSI) with battery, is proposed in this paper. With a battery paralleled with one of the capacitors, this system can smooth the grid-injected/load power when the PV panel outputs a variable power with fluctuations. The battery can be charged or discharged without any extra circuit, because of the unique impedance network of QZSI. The operating principle and power flow of this system are analyzed. The closed-loop control strategy is used to achieve Maximum Power Point Tracking (MPPT) and keep the output voltage stable. Three operating modes of the proposed PV power generation system are simulated in the MATLAB/Simulink to verify its principle and theoretical analysis. A prototype is built in the lab, and the experimental results validate the whole system.

Keywords

closed loop systems; invertors; load flow; photovoltaic power systems; power generation control; MATLAB-Simulink; PV panel; battery based photovoltaic power generation system; closed-loop control strategy; grid-injected-load power; maximum power point tracking; operating principle; power flow; power generation topology; quasi-Z source inverter; unique impedance network; Batteries; Educational institutions; Inductors; Inverters; Power generation; System-on-a-chip; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2011 International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4577-1044-5

Type

conf

DOI

10.1109/ICEMS.2011.6073594

Filename

6073594