Evaluation of PWM Methods for Suppressing Circulating Current Among Parallel-Connected Four-Pole Inverters

This paper investigates the effects of pulse width modulation (PWM) on the circulating current of parallel-connected four-pole inverters (FPIs). Detailed mathematical modeling shows that the common-mode voltage (CMV) outputs of PWMs are closely related to the circulating current, so this research presents the reduced CMV PWM techniques for FPIs to reduce the circulating current, and compares their performances with the conventional PWM schemes. This study also shows how the controller structure of FPI affects the use of PWM schemes and the resulting circulating current. Laboratory test results are provided to validate their effectiveness.

[1]  Po-Tai Cheng,et al.  Circulating current reduction of parallel connected four-pole inverters , 2015, 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia).

[2]  Seung-Ki Sul,et al.  A carrier-based PWM method for three-phase four-leg voltage source converters , 2004, IEEE Transactions on Power Electronics.

[3]  E. Un,et al.  A Near State PWM Method With Reduced Switching Frequency And Reduced Common Mode Voltage For Three-Phase Voltage Source Inverters , 2007, 2007 IEEE International Electric Machines & Drives Conference.

[4]  Dushan Boroyevich,et al.  Control of circulating current in two parallel three-phase boost rectifiers , 2002 .

[5]  D. Boroyevich,et al.  Common-Mode Circulating Current Control of Paralleled Interleaved Three-Phase Two-Level Voltage-Source Converters With Discontinuous Space-Vector Modulation , 2011, IEEE Transactions on Power Electronics.

[6]  Hirofumi Akagi,et al.  A novel control scheme of a parallel current-controlled PWM inverter , 1992 .

[7]  A.M. Hava,et al.  A Scalar Resonant-Filter-Bank-Based Output-Voltage Control Method and a Scalar Minimum-Switching-Loss Discontinuous PWM Method for the Four-Leg-Inverter-Based Three-Phase Four-Wire Power Supply , 2009, IEEE Transactions on Industry Applications.

[8]  A.M. Hava,et al.  A Near-State PWM Method With Reduced Switching Losses and Reduced Common-Mode Voltage for Three-Phase Voltage Source Inverters , 2009, IEEE Transactions on Industry Applications.

[9]  Chung-Chuan Hou.  A Multicarrier PWM for Parallel Three-Phase Active Front-End Converters , 2013, IEEE Transactions on Power Electronics.

[10]  Francisco A. S. Neves,et al.  Modulation Techniques to Eliminate Leakage Currents in Transformerless Three-Phase Photovoltaic Systems , 2010, IEEE Transactions on Industrial Electronics.

[11]  Dushan Boroyevich,et al.  Three-dimensional space vector modulation for four-leg voltage-source converters , 2002 .

[12]  A.M. Hava,et al.  Performance Analysis of Reduced Common-Mode Voltage PWM Methods and Comparison With Standard PWM Methods for Three-Phase Voltage-Source Inverters , 2009, IEEE Transactions on Power Electronics.

[13]  Jin Li,et al.  Modeling, Analysis, and Mitigation of Load Neutral Point Voltage for Three-Phase Four-Leg Inverter , 2013, IEEE Transactions on Industrial Electronics.

[14]  Min Zhang,et al.  A Near-State Three-Dimensional Space Vector Modulation for a Three-Phase Four-Leg Voltage Source Inverter , 2014, IEEE Transactions on Power Electronics.

[15]  S. Munk‐Nielsen,et al.  Analysis and modelling of circulating current in two parallel-connected inverters , 2015 .

[16]  Xu Dianguo,et al.  Bandwidth Expansion Method for Circulating Current Control in Parallel Three-phase PWM Converter Connection System , 2014, IEEE Transactions on Power Electronics.

[17]  Ahmet M. Hava,et al.  Simple Analytical and Graphical Methods for Carrier-Based PWM-VSI Drives , 1999 .

[18]  Ching-Tsai Pan,et al.  Modeling and Control of Circulating Currents for Parallel Three-Phase Boost Rectifiers With Different Load Sharing , 2008, IEEE Transactions on Industrial Electronics.

[19]  Min Zhang,et al.  A zero-sequence component injected PWM method with reduced switching losses and suppressed common-mode voltage for a three-phase four-leg voltage source inverter , 2012, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society.

[20]  Yen-Shin Lai,et al.  Optimal common-mode voltage reduction PWM technique for induction motor drives with considering the dead-time effects for inverter control , 2003, 38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003..

[21]  A. M. Hava,et al.  A High-Performance PWM Algorithm for Common-Mode Voltage Reduction in Three-Phase Voltage Source Inverters , 2008, IEEE Transactions on Power Electronics.

[22]  Po-Tai Cheng,et al.  A multi-carrier pulse width modulator for the auxiliary converter and the diode rectifier , 2009, 2009 International Conference on Power Electronics and Drive Systems (PEDS).

[23]  Alfio Consoli,et al.  Reduction of common mode currents in PWM inverter motor drives , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.