An Integrated Inductor for Parallel Interleaved Three-Phase Voltage Source Converters

Three-phase voltage source converters (VSCs) are often connected in parallel to realize the high current output converter system. The harmonic quality of the resultant switched output voltage can be improved by interleaving the carrier signals of these parallel-connected VSCs. As a result, the line current filtering requirement can be reduced. However, an additional inductive filter is required to suppress the circulating current. The integrated inductive component, which combines the functionality of the line filter inductor and the circulating current inductor is presented in this paper. An analysis of the flux density distribution in the integrated inductor is presented and design procedure is described. The analysis has been also verified by performing finite-element analysis. The advantage offered by the use of the integrated inductor is demonstrated by comparing its volume with the volume of the state-of-the-art filtering solution. The performance of the integrated inductor is also verified by the experimental measurements.

[1]  Dianguo Xu,et al.  Control of Parallel Multiple Converters for Direct-Drive Permanent-Magnet Wind Power Generation Systems , 2012, IEEE Transactions on Power Electronics.

[2]  F. Forest,et al.  Design and Comparison of Inductors and Intercell Transformers for Filtering of PWM Inverter Output , 2009, IEEE Transactions on Power Electronics.

[3]  Leon M. Tolbert,et al.  Efficiency Impact of Silicon Carbide Power Electronics for Modern Wind Turbine Full Scale Frequency Converter , 2011, IEEE Transactions on Industrial Electronics.

[4]  Jian Sun,et al.  A Comprehensive Study of Harmonic Cancellation Effects in Interleaved Three-Phase VSCs , 2007, 2007 IEEE Power Electronics Specialists Conference.

[5]  Johann W. Kolar,et al.  Parallel Connection of Two Three-Phase Three-Switch Buck-Type Unity-Power-Factor Rectifier Systems With DC-Link Current Balancing , 2007, IEEE Transactions on Industrial Electronics.

[6]  Andrew M. Knight,et al.  PWM Inverters Using Split-Wound Coupled Inductors , 2009 .

[7]  Hirofumi Akagi,et al.  Control Strategy of Active Power Filters Using Multiple Voltage-Source PWM Converters , 1986, IEEE Transactions on Industry Applications.

[8]  B. Andresen,et al.  A high power density converter system for the Gamesa G10x 4,5 MW wind turbine , 2007, 2007 European Conference on Power Electronics and Applications.

[9]  Keiju Matsui,et al.  Parallel-connections of pulsewidth modulated inverters using current sharing reactors , 1995 .

[10]  Frede Blaabjerg,et al.  Design of the trap filter for the high power converters with parallel interleaved VSCs , 2014, IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society.

[11]  I. Park,et al.  Modeling and analysis of multi-interphase transformers for connecting power converters in parallel , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[12]  Dushan Boroyevich,et al.  Impact of Interleaving on AC Passive Components of Paralleled Three-Phase Voltage-Source Converters , 2010, IEEE Transactions on Industry Applications.

[13]  Ghanshyamsinh Vijaysinh.  Line filter design of parallel interleaved VSCs for high power wind energy conversion systems , 2016 .

[14]  D. Boroyevich,et al.  Total Flux Minimization Control for Integrated Inter-Phase Inductors in Paralleled, Interleaved Three-Phase Two-Level Voltage-Source Converters With Discontinuous Space-Vector Modulation , 2012, IEEE Transactions on Power Electronics.

[15]  F. Blaabjerg,et al.  Modified Discontinuous PWM for Size Reduction of the Circulating Current Filter in Parallel Interleaved Converters , 2015, IEEE Transactions on Power Electronics.

[16]  G. Narayanan,et al.  Minimization of Grid Current Distortion in Parallel-Connected Converters Through Carrier Interleaving , 2014, IEEE Transactions on Industrial Electronics.

[17]  Marco Liserre,et al.  Overview of Multi-MW Wind Turbines and Wind Parks , 2011, IEEE Transactions on Industrial Electronics.

[18]  T. Martire,et al.  Optimization of the Supply Voltage System in Interleaved Converters Using Intercell Transformers , 2007, IEEE Transactions on Power Electronics.

[19]  Frede Blaabjerg,et al.  Shunt Active-Power-Filter Topology Based on Parallel Interleaved Inverters , 2008, IEEE Transactions on Industrial Electronics.

[20]  R. Ayyanar,et al.  Hybrid Interleaved Space Vector PWM for Ripple Reduction in Modular Converters , 2011, IEEE Transactions on Power Electronics.

[21]  I. Barbi,et al.  Three-Phase DC–AC Converter Using Four-State Switching Cell , 2011, IEEE Transactions on Power Electronics.

[22]  Johann W. Kolar,et al.  Optimal design of LCL harmonic filters for three-phase PFC rectifiers , 2011 .

[23]  Fred C. Lee,et al.  Interleaved PWM with discontinuous space-vector modulation , 1999 .

[24]  Frede Blaabjerg,et al.  Parallel interleaved VSCs: Influence of the PWM scheme on the design of the coupled inductor , 2014, IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society.