An Improved Virtual Space Vector Modulation Scheme for Three-Level Active Neutral-Point-Clamped Inverter

This paper presents an improved virtual space vector modulation (IVSVM) scheme for a three-level active neutral-point-clamped (3L-ANPC) inverter to balance neutral-point potential (NP), reduce switching loss, and suppress common mode voltage (CMV). In the IVSVM scheme, an improved virtual medium vector (VMV) is synthesized by the original medium vector and the adjacent two pairs of the small vectors since there are always two pairs of the small vectors in any regions of the new space vector diagram. The improved VMV provides the flexibility to control the NP balancing under any modulation indexes and power factors in one switching cycle while achieving SL reduction and CMV suppression. This is achieved by the proper selection of two pairs of small vectors in terms of NP charge and the pulse sequence. The experimental platform based on a 3L-ANPC inverter is established and results obtained to verify the effectiveness of the IVSVM control strategy.

[1]  Joan Rocabert,et al.  Closed-Loop Control of a Three-Phase Neutral-Point-Clamped Inverter Using an Optimized Virtual-Vector-Based Pulsewidth Modulation , 2008, IEEE Transactions on Industrial Electronics.

[2]  F. Lee,et al.  Space Vector Modulation for Three-Level NPC Converter With Neutral Point Voltage Balance and Switching Loss Reduction , 2014, IEEE Transactions on Power Electronics.

[3]  Yongdong Li,et al.  A direct torque control of induction motor based on three-level NPC inverter , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[4]  M. R. Baiju,et al.  A New Space Vector Modulation Scheme for Multilevel Inverters Which Directly Vector Quantize the Reference Space Vector , 2015, IEEE Transactions on Industrial Electronics.

[5]  Yun Wei Li,et al.  A Space-Vector Modulation Method for Common-Mode Voltage Reduction in Current-Source Converters , 2014, IEEE Transactions on Power Electronics.

[6]  D. Boroyevich,et al.  Capacitor Voltage Balance for the Neutral-Point- Clamped Converter using the Virtual Space Vector Concept With Optimized Spectral Performance , 2007, IEEE Transactions on Power Electronics.

[7]  Pragasen Pillay,et al.  DC-Bus Voltage Balancing Algorithm for Three-Level Neutral-Point-Clamped (NPC) Traction Inverter Drive With Modified Virtual Space Vector , 2016, IEEE Transactions on Industry Applications.

[8]  Jin Liu,et al.  A Space Virtual-Vector Modulation With Voltage Balance Control for Nested Neutral-Point Clamped Converter Under Low Output Frequency Conditions , 2017, IEEE Transactions on Power Electronics.

[9]  Bin Wu,et al.  A Virtual Space Vector Modulation Technique for the Reduction of Common-Mode Voltages in Both Magnitude and Third-Order Component , 2016, IEEE Transactions on Power Electronics.

[10]  Han Ju Cha,et al.  An approach to reduce common mode voltage in matrix converter , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[11]  Hirofumi Akagi,et al.  A New Neutral-Point-Clamped PWM Inverter , 1981, IEEE Transactions on Industry Applications.

[12]  Donald Grahame Holmes,et al.  A Generalized Natural Balance Model and Balance Booster Filter Design for Three-Level Neutral-Point-Clamped Converters , 2015, IEEE Transactions on Industry Applications.

[13]  Cungang Hu,et al.  A theoretical study of neutral point voltage balancing problem in three-level neutral- point-clamped PWM VSI , 2007, 2007 International Conference on Electrical Machines and Systems (ICEMS).

[14]  Bai Baodong,et al.  Inverter IGBT loss analysis and calculation , 2013, 2013 IEEE International Conference on Industrial Technology (ICIT).

[15]  Hendrik du T. Mouton,et al.  Natural balancing of three-level neutral-point-clamped PWM inverters , 2002, IEEE Trans. Ind. Electron..

[16]  R. Iravani,et al.  A generalized state-space averaged model of the three-level NPC converter for systematic DC-voltage-balancer and current-controller design , 2005, IEEE Transactions on Power Delivery.

[17]  Steffen Bernet,et al.  The active NPC converter and its loss-balancing control , 2005, IEEE Transactions on Industrial Electronics.

[18]  Yukihiko Sato,et al.  Analysis of conduction losses in inverters , 1995 .

[19]  Zhan Liu,et al.  An Optimized SVPWM Strategy for Five-Level Active NPC (5L-ANPC) Converter , 2014, IEEE Transactions on Power Electronics.

[20]  Kui Wang,et al.  Capacitor Voltage Balancing of a Five-Level ANPC Converter Using Phase-Shifted PWM , 2015, IEEE Transactions on Power Electronics.

[21]  Qin Zhao,et al.  Hybrid PWM Strategy of SVPWM and VSVPWM for NPC Three-Level Voltage-Source Inverter , 2010, IEEE Transactions on Power Electronics.

[22]  D. Boroyevich,et al.  The nearest three virtual space vector PWM - a modulation for the comprehensive neutral-point balancing in the three-level NPC inverter , 2004, IEEE Power Electronics Letters.

[23]  S R Pulikanti,et al.  Voltage Balancing Control of Three-Level Active NPC Converter Using SHE-PWM , 2011, IEEE Transactions on Power Delivery.

[24]  P.K. Steimer,et al.  Feedforward Loss Control of Three-Level Active NPC Converters , 2007, IEEE Transactions on Industry Applications.

[25]  Stig Munk-Nielsen,et al.  Design of Neutral-Point Voltage Controller of a Three-Level NPC Inverter With Small DC-Link Capacitors , 2013, IEEE Transactions on Industrial Electronics.

[26]  A. von Jouanne,et al.  Multilevel inverter modulation schemes to eliminate common-mode voltages , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[27]  Philippe Baudesson,et al.  A New Carrier-Based PWM Providing Common-Mode-Current Reduction and DC-Bus Balancing for Three-Level Inverters , 2007, IEEE Transactions on Industrial Electronics.