An Eight-Switch Five-Level Current Source Inverter

This paper proposes an eight-switch, three-phase, five-level current source inverter (CSI), which employs only one traditional H6 inverter and two shunt branches at the dc side to realize the five-level switching. The corresponding space-vector-modulation (SVM) strategy for the proposed CSI topology is also presented, which uses the two shunt-connected power switches to add certain special modulation-state segments to ensure the switching instants completed under lower current stresses and lower power dissipation. Compared with the state-of-the-art CSI solutions, the proposed topology has a comparable hardware cost as the three-level H6 CSI, while outputs five-level currents. The low-output total harmonic distortion (THD) may help to reduce the sizes of the passive components in the system, and the modulation scheme reduces the switching and conduction losses of the semiconductor switching devices in the H6 CSI module, which can make it possible to increase the output current rating of the system in a certain degree. Simulation and experimental results verified the performance of the proposed CSI.

[1]  I. Barbi,et al.  A new technique for parallel connection of commutation cells: analysis, design and experimentation , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[2]  ZhiHong Bai,et al.  Conformation of Multilevel Current Source Converter Topologies Using the Duality Principle , 2008, IEEE Transactions on Power Electronics.

[3]  Bin Wu,et al.  High-Power Converters and AC Drives , 2006 .

[4]  V.T. Ranganathan,et al.  Load-Commutated SCR Current-Source-Inverter-Fed Induction Motor Drive With Sinusoidal Motor Voltage and Current , 2009, IEEE Transactions on Power Electronics.

[5]  Bin Wu,et al.  Control Strategy With a Generalized DC Current Balancing Method for Multimodule Current-Source Converter , 2014, IEEE Transactions on Power Electronics.

[6]  Bin Wu,et al.  Space Vector Modulation for High Power Five Level Current Source Inverters , 2006 .

[7]  Alireza Nami,et al.  Modular Multilevel Converters for HVDC Applications: Review on Converter Cells and Functionalities , 2015, IEEE Transactions on Power Electronics.

[8]  Vishal Vekhande,et al.  Switching State Vector Selection Strategies for Paralleled Multilevel Current-Fed Inverter Under Unequal DC-Link Currents Condition , 2015, IEEE Transactions on Power Electronics.

[9]  F. Gao,et al.  Operation and modulation of H7 current source inverter with hybrid SiC and Si semiconductor switches , 2018, 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia).

[10]  H.A. Toliyat,et al.  Multilevel current source inverter topology based on dual structure associations , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[11]  Xiongfei Wang,et al.  A Coordinate Control Strategy for Circulating Current Suppression in Multiparalleled Three-Phase Inverters , 2017, IEEE Transactions on Industrial Electronics.

[12]  Bin Wu,et al.  Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives , 2007, IEEE Transactions on Industrial Electronics.

[13]  Brendan McGrath,et al.  Natural Current Balancing of Multicell Current Source Converters , 2007, PESC 2007.

[14]  Bin Wu,et al.  Megawatt wind energy conversion system with diode rectifier and multilevel current source inverter , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[15]  Frede Blaabjerg,et al.  Five-Level Current-Source Inverters With Buck–Boost and Inductive-Current Balancing Capabilities , 2010, IEEE Transactions on Industrial Electronics.

[16]  V. T. Ranganathan,et al.  A novel CSI-fed induction motor drive , 2006, IEEE Transactions on Power Electronics.

[17]  M. L. Heldwein,et al.  Space Vector Modulation Strategy Applied to Interphase Transformers-Based Five-Level Current Source Inverters , 2012, IEEE Transactions on Power Electronics.

[18]  K.W.E. Cheng,et al.  A multimodule hybrid converter for high-temperature superconducting magnetic energy storage systems (HT-SMES) , 2005, IEEE Transactions on Power Delivery.

[19]  B. Wu,et al.  Multilevel Current Source Inverters with Phase Shifted Trapezoidal PWM , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[20]  S. Daher,et al.  Multilevel current source inverter-the switching control strategy for high power application , 1996, Proceedings of the 1996 IEEE IECON. 22nd International Conference on Industrial Electronics, Control, and Instrumentation.

[21]  Bin Wu,et al.  Recent Advances and Industrial Applications of Multilevel Converters , 2010, IEEE Transactions on Industrial Electronics.

[22]  Bin Wu,et al.  Current-Source Converter and Cycloconverter Topologies for Industrial Medium-Voltage Drives , 2008, IEEE Transactions on Industrial Electronics.

[23]  Alireza Nami,et al.  Current source modular multilevel converter for HVDC and FACTS , 2013, 2013 15th European Conference on Power Electronics and Applications (EPE).

[24]  Mario Marchesoni,et al.  Diode-clamped multilevel converters: a practicable way to balance DC-link voltages , 2002, IEEE Trans. Ind. Electron..

[25]  K. T. Chau,et al.  Power Compensation and Power Quality Improvement Based on Multiple-Channel Current Source Converter Fed HT SMES , 2012, IEEE Transactions on Applied Superconductivity.