Cart (Loading....) | Create Account
Close category search window
 

Minimisation of DC current component in transformerless Grid-connected PV inverter application

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Berba, F. ; Sch. of Electr., Newcastle Univ., Newcastle upon Tyne, UK ; Atkinson, David ; Armstrong, M.

Single-phase current controlled, voltage source inverters are commonly used to feed unity power factor sinusoidal current into the distribution network from PV sources. A large 50 Hz transformer is often used at the inverter output for galvanic isolation and to prevent dc current injection into the distribution network. This transformer increases cost, size and overall power losses of the system. For this reason, transformerless inverters are of increasing interest. When an output transformer is not present it is important that the output current is controlled accurately in order to minimise the DC component. The accuracy of the DC current sensor then becomes important to achieving this. A scheme is proposed in which DC link current sensing and current control are used to minimise the output DC current component. Current controllers are affected by errors associated with nonlinearity and offset in the current sensors. This paper applies an auto-calibrating DC link current sensing technique to minimise the errors produced by current sensors in the single-phase, 3-level half-bridge inverter. Characteristics of the proposed method are illustrated using simulation and experimental results with a resistive load.

Published in:

Environment and Electrical Engineering (EEEIC), 2011 10th International Conference on

Date of Conference:

8-11 May 2011

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.