A Three-Level Space Vector Modulation Scheme for Paralleled Converters to Reduce Circulating Current and Common-Mode Voltage
- 12 February 2016
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Electronics
- Vol. 32 (1), 703-714
- https://doi.org/10.1109/tpel.2016.2529959
Abstract
For high-power applications, paralleling converters is a popular approach to increase the power capacity of the system. Circulating current has been a major concern for the implementation of paralleled converters. This paper proposes a three-level space vector modulation (SVM) scheme for a system with two paralleled voltage-source converters (VSCs) with common-mode inductor (CMI) or single-phase inductors. The proposed scheme aims to reduce the zero-sequence circulating current (ZSCC) and the magnitude of common-mode voltage (CMV) of the system simultaneously. The ZSCC patterns with respect to modulation schemes are first analyzed to provide a clear understanding of the generation of ZSCC. Based on the analysis, the proposed three-level modulation scheme is introduced. Furthermore, performance regarding the ZSCC peak value, impact on the common-mode current (CMC), CMI scaling analysis, and switching losses are analyzed and compared with the existing methods. The proposed method has been verified in both simulation and experiment.Keywords
Funding Information
- Natural Sciences and Engineering Research Council of Canada (NSERC)
This publication has 36 references indexed in Scilit:
- Multiphase-Leg Coupling Current Balancer for Parallel Operation of Multiple MW Power ModulesIEEE Transactions on Industrial Electronics, 2013
- A Multicarrier PWM for Parallel Three-Phase Active Front-End ConvertersIEEE Transactions on Power Electronics, 2012
- Common-Mode Voltage Reduction Pulsewidth Modulation Techniques for Three-Phase Grid-Connected ConvertersIEEE Transactions on Power Electronics, 2012
- Scaling Issues for Common-Mode Chokes to Mitigate Ground Currents in Inverter-Based Drive SystemsIEEE Transactions on Industry Applications, 2009
- Performance Analysis of Reduced Common-Mode Voltage PWM Methods and Comparison With Standard PWM Methods for Three-Phase Voltage-Source InvertersIEEE Transactions on Power Electronics, 2009
- Application of Series Type BTB Converter for Minimizing Circulating Current and Balancing Power Transformers in Loop Distribution LinesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007
- Current Weighting Distribution Control Strategy for Multi-Inverter Systems to Achieve Current SharingIEEE Transactions on Power Electronics, 2007
- High‐Power Converters and ac DrivesPublished by Wiley ,2005
- Simple analytical and graphical methods for carrier-based PWM-VSI drivesIEEE Transactions on Power Electronics, 1999
- A novel control scheme of a parallel current-controlled PWM inverterIEEE Transactions on Industry Applications, 1992