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Transformer-Less Grid Feeding Current Source Inverter for Solar Photovoltaic System

DSpace at IIT Bombay

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Title Transformer-Less Grid Feeding Current Source Inverter for Solar Photovoltaic System
 
Creator ANAND, S
GUNDLAPALLI, SK
FERNANDES, BG
 
Subject Current source inverter (CSI)
grid feeding system
operation life
solar photovoltaic (PV)
CURRENT-SOURCE CONVERTER
POWER POINT TRACKING
CONNECTED INVERTER
LOSSES
 
Description High efficiency and operating life of grid feeding solar photovoltaic (PV) inverters are demanded. Due to reduced dc-link capacitor requirement, current source inverter (CSI) offers higher reliability than the voltage source based solar inverter. However, conventional three-phase pulse width modulated (PWM) current source based solar inverter injects high earth leakage current into the grid. In order to suppress this current, an isolation transformer can be used. Use of this transformer increases the cost and size, and decreases overall efficiency. In order to address the aforementioned limitations, a modified CSI is proposed in this paper. The proposed inverter suppresses the earth leakage current without using an isolation transformer, thereby increasing the efficiency and reducing cost as compared to conventional current source based solar inverters. A mathematical model of the system is derived based on which controller for the operation of the inverter is designed. The effectiveness of the scheme is verified through detailed simulation study. To confirm the viability of the scheme, experimental studies are carried out on a scaled-down laboratory prototype.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2014-12-28T14:18:18Z
2014-12-28T14:18:18Z
2014
 
Type Article
 
Identifier IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 61(10)5334-5344
0278-0046
1557-9948
http://dx.doi.org/10.1109/TIE.2014.2300038
http://dspace.library.iitb.ac.in/jspui/handle/100/16733
 
Language English