Advanced Single-Phase Nine-Level Converter for the Integration of Multiterminal DC Supplies

This paper presents a new symmetrical single-phase nine-level dc–ac converter for the applications of distributed generation systems. The proposed multilevel inverter (MLI) utilizes four independent dc sources to generate the nine output voltage levels considering a reduced number of switching devices. The proposed inverter consists of main and auxiliary circuits. The main circuit is a single H-bridge circuit, which is responsible for output voltage polarity. The auxiliary circuit consists of a special combination of switching devices, which are used to synthesize the multilevel output voltage. The merits of the proposed MLI are: increased output voltage levels at reduced number of switching devices, low switching loss, low total harmonic distortion, low dv/dt stress on the switches, and hence, low ratings of the switching devices, and low cost. The effectiveness of the proposed MLI and its pulsewidth modulation switching pattern has been verified experimentally by using a laboratory prototype controlled by DSPACE-1103.

[1]  A Ghosh,et al.  A Hybrid Cascade Converter Topology With Series-Connected Symmetrical and Asymmetrical Diode-Clamped H-Bridge Cells , 2009, IEEE Transactions on Power Electronics.

[2]  J. Fernando A. da Silva,et al.  Fast-Predictive Optimal Control of NPC Multilevel Converters , 2013, IEEE Transactions on Industrial Electronics.

[3]  Seyed Hossein Hosseini,et al.  Reduction of Power Electronic Elements in Multilevel Converters Using a New Cascade Structure , 2015, IEEE Transactions on Industrial Electronics.

[4]  Ebrahim Babaei,et al.  A New Multilevel Converter Topology With Reduced Number of Power Electronic Components , 2012, IEEE Transactions on Industrial Electronics.

[5]  Ebrahim Babaei,et al.  Cross-switched multilevel inverter: an innovative topology , 2013 .

[6]  A. Meghana,et al.  Seventeen-Level Inverter Formed by Cascading Flying Capacitor and Floating Capacitor H-Bridges , 2016 .

[7]  Jin-Soo Park,et al.  Photovoltaic inverter employing auxiliary circuit to synthesize multilevel output voltage , 2014, 2014 IEEE 3rd Global Conference on Consumer Electronics (GCCE).

[8]  Shailendra Jain,et al.  Multilevel inverter for interfacing renewable energy sources with low/medium- and high-voltage grids , 2017 .

[9]  N. Sandeep,et al.  Novel asymmetrical multilevel inverter topology with reduced number of switches for photovoltaic applications , 2015, 2015 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC).

[10]  Mohamed Orabi,et al.  New Three-Phase Symmetrical Multilevel Voltage Source Inverter , 2015, IEEE Journal on Emerging and Selected Topics in Circuits and Systems.

[11]  T.A. Meynard,et al.  Multi-level conversion: high voltage choppers and voltage-source inverters , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[12]  M. Kaliamoorthy,et al.  A novel single phase cascaded multilevel inverter for hybrid renewable energy sources , 2015, 2015 International Conference on Advanced Computing and Communication Systems.

[13]  Haitham Abu-Rub,et al.  A Nine-Level Inverter Topology for Medium-Voltage Induction Motor Drive With Open-End Stator Winding , 2013, IEEE Transactions on Industrial Electronics.

[14]  Jin-Sung Choi,et al.  Seven-Level PWM Inverter Employing Series-Connected Capacitors Paralleled to a Single DC Voltage Source , 2015, IEEE Transactions on Industrial Electronics.

[15]  Ebrahim Babaei,et al.  An Improved Symmetric H-Bridge Multilevel Converter Topology; An Attempt to Reduce Power Losses , 2018, J. Circuits Syst. Comput..

[16]  S. Kouro,et al.  Flyback-based sub-module PV microinverter , 2016, 2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe).

[17]  M. Marchesoni,et al.  A non conventional power converter for plasma stabilization , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

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

[19]  Shailendra Jain,et al.  Multilevel inverter topology based on series connected switched sources , 2013 .

[20]  Hirotaka Koizumi,et al.  A single phase multilevel inverter using switched series/parallel DC voltage sources , 2009 .

[21]  E. Babaei,et al.  A Cascade Multilevel Converter Topology With Reduced Number of Switches , 2008, IEEE Transactions on Power Electronics.

[22]  D.G. Holmes,et al.  Analytical Determination of the Capacitor Voltage Balancing Dynamics for Three Phase Flying Capacitor Converters , 2007, 2007 IEEE Industry Applications Annual Meeting.

[23]  G. B. Gharehpetian,et al.  A New Topology of Cascaded Multilevel Converters With Reduced Number of Components for High-Voltage Applications , 2011, IEEE Transactions on Power Electronics.

[24]  E. Babaei,et al.  A Generalized Cascaded Multilevel Inverter Using Series Connection of Submultilevel Inverters , 2013, IEEE Transactions on Power Electronics.

[25]  C. S. Babu,et al.  New multilevel inverter topology with reduced number of switches using advanced modulation strategies , 2013, 2013 International Conference on Power, Energy and Control (ICPEC).

[26]  Ebrahim Babaei,et al.  A Single-Phase Cascaded Multilevel Inverter Based on a New Basic Unit With Reduced Number of Power Switches , 2015, IEEE Transactions on Industrial Electronics.

[27]  Leopoldo García Franquelo,et al.  Analysis of the Power Balance in the Cells of a Multilevel Cascaded H-Bridge Converter , 2010, IEEE Transactions on Industrial Electronics.

[28]  Mohamed Orabi,et al.  PWM Control Techniques for Single-Phase Multilevel Inverter Based Controlled DC Cells , 2016 .

[29]  Hurng-Liahng Jou,et al.  Small-capacity grid-connected solar power generation system , 2014 .

[30]  Benjamin Chong,et al.  Three-phase four-leg flying-capacitor multi-level inverter-based active power filter for unbalanced current operation , 2013 .

[31]  Yaohua Li,et al.  A Novel Single-Phase Five-Level Inverter With Coupled Inductors , 2012, IEEE Transactions on Power Electronics.

[32]  K. Gopakumar,et al.  Multilevel inverters for low-power application , 2011 .