A lifetime improved single phase grid connected photovoltaic inverter

Author

Mirzahosseini, R. ; Tahami, F.

Author_Institution

Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran

fYear

2012

fDate

15-16 Feb. 2012

Firstpage

234

Lastpage

238

Abstract

In this paper, a reliable low power single phase grid-connected inverter for photovoltaic modules is proposed. The inverter has improved lifetime since large electrolytic capacitor is replaced with small film capacitor due to circuit topology, power processing and proper control scheme. Thus the main limiting component in single phase grid connected inverters is obviated. The proposed inverter consists of two power processing stages. First a dual active bridge (DAB) converter boosts the voltage of PV panel to approximately 440 V and eliminates impact of high dc bus voltage ripples. A proper feed forward control is proposed to regulate the dc bus voltage with high ripple. Simulation results prove that obviating large electrolytic capacitor has no effect on utilization factor of photovoltaic modules.

Keywords

electrolytic capacitors; feedforward; invertors; photovoltaic power systems; power grids; power system control; PV panel; circuit topology; dual active bridge converter; feed forward control; high dc bus voltage ripples; large electrolytic capacitor; lifetime improved single phase grid connected photovoltaic inverter; low power single phase grid-connected inverter; main limiting component; photovoltaic modules; power processing stages; proper control scheme; small film capacitor; utilization factor; Sensors; Phase-shift control; duty cycle control; photovoltaic (PV) module;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems Technology (PEDSTC), 2012 3rd

Conference_Location

Tehran

Print_ISBN

978-1-4673-0111-4

Type

conf

DOI

10.1109/PEDSTC.2012.6183332

Filename

6183332