By Topic

DSP-based implementation of capacitor voltage balancing strategy for a three-phase three-level bidirectional rectifier

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
$33 $33
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

2 Author(s)
A. H. Bhat ; Department of Electrical Engineering, Indian Institute of Technology Roorkee ; P. Agarwal

Digital signal processing (DSP)-based implementation of a modified space-vector modulation strategy for balancing the DC-bus capacitor voltages of a three-phase neutral-point clamped bidirectional converter is presented. The proposed modulation strategy is simple in nature. It first identifies the switching states responsible for the unbalancing of capacitor voltages and then, based on the knowledge of polarity of capacitor voltage difference and direction of power flow, uses the appropriate redundant switching vectors to achieve the balancing of capacitor voltages. The analysis and control of the converter is described. The proposed control algorithm is validated through experimental results obtained on a laboratory prototype of the converter. The performance of the converter is found excellent in terms of the line-side and load-side power quality. A perfect balancing of the DC-bus capacitor voltages is achieved under balanced as well as unbalanced load conditions. The performance of converter is also investigated with distorted mains voltages and found satisfactory. DSP of dSPACE has been used for real-time simulation and implementation of the proposed control algorithm.

Published in:

IET Power Electronics  (Volume:2 ,  Issue: 4 )