Abstract

Multilevel inverters are receiving continuous attention in terms of circuit topology, control methods and applications. This paper presents a modified topology that applies a bidirectional switching module to reduce the number of switches of the 3-level inverter. Common emitter back-to-back IGBTs have been used to assemble the bidirectional conducting module. The modified inverter has been controlled using the selected harmonics eliminations technique with 3, 4 and 5 primary switching angles. The control algorithm has been implemented using a basic fixed point, low-cost microcontroller. Results including output voltage and current waveforms, spectrum, harmonic distortion, and converter efficiency data are presented. Simulation and experimental results verified the ability of the inverter to provide a wide range of output voltage and eliminate the targeted harmonics.

References

• Rodríguez, J.; Morán, L.; Pontt, J.; Hernández, J.L.; Silva, L.; Silva, C.; and Lezana, P. (2002). High-Voltage Multilevel Converter With Regeneration Capability. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 49(4).
• Hosoda, H.; and Peak, S. (2010). Multi-Level Converters for Large Capacity Motor Drive. The 2010 International Power Electronics Conference.
• Rodríguez, J.; Bernet, S.; Wu, B.; Pontt, J.O.; and Kouro, S. (2007). Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 54( 6).
• Rao, N.M.; Reddy, D.R.; and Jayakrishina, G. (2016). Large-Scale Grid-Connected Photovoltaic Systems using Cascaded Modular Multilevel Converters for Decoupled Active and Reactive Power Control. International Journal of Advanced Technology and Innovative Research, 08(21), 4066-4071.
• Avci, E.; and Ucar, M. (2017). Analysis and design of grid-connected 3-phase 3-level AT-NPC inverter for low-voltage applications. Turkish Journal of Electrical Engineering & Computer Sciences, 25, 2464 -2478.
• Ozdemir, E.; Ozdemir, S.; and Tolbert, L.M. (2009). Fundamental-Frequency-Modulated Six-Level Diode-Clamped Multilevel Inverter for Three-Phase Stand-Alone Photovoltaic System. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 56(11).
• Huang, J.; and Corzine, K.A. (2006). Extended Operation of Flying Capacitor Multilevel Inverters. IEEE TRANSACTIONS ON POWER ELECTRONICS, 21(1).
• Villanueva, E,; Correa, P.; Rodríguez, J.; and Pacas, M. (2009). Control of a Single-Phase Cascaded H-Bridge Multilevel Inverter for Grid-Connected Photovoltaic Systems. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 56(11).
• Abirami, R.; Chellammal, N.; Dash, S.S.; and Velmurugan, V. (2013). Multicarrier Pulse Width Modulation Based Hybrid Multilevel Inverter. Proc. of Int. Conf. on Control, Communication and Power Engineering. published by Elsevier Academic Press.
• Hasan, M.; Mekhilef, S.; and Ahmed, M. (2014). Three-phase hybrid multilevel inverter with less power electronic components using space vector modulation. IET Power Electronics, 7(5), 1256–1265.
• Mahrous, E.A.; Rahim, N.A.; and Hew, W.P. (2006). Analysis Design and Simulation of a Three-Phase Three-Level Nine Switches-Inverter Using Space Vector Modulation. The 6th International Workshop on System on Chip for Real-Time Applications. Cairo, Egypt.
• Balakrishnan, D.; and Shanmugam, D. (2013). Modified Multilevel Inverter Topology with Reduced Switch Count and a Novel PWM Control Scheme. International Journal of Scientific and Research Publications, 3(11).
• Jamaludin, J.; Abd Rahim, N.; and Ping, H.W. (2013). An 11-Switch Multilevel Inverter With a Modified Space Vector Modulation. Turkish Journal of Electrical Engineering & Computer Sciences, 24, 171 - 183.
• Brückner, T.; Bernet, S.; and Güldner, H. (2005). The Active NPC Converter and Its Loss-Balancing Control. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 52(3).
• Jalhotra, M.; Kumar, L.; Gautam, S.P.; and Gupta, S. (2018). Development of fault-tolerant MLI topology. IET Power Electronics.
• Gautam, S.P.; Gupta, S.; and Kumar, L. (2017). Reliability improvement of transistor clamped H-bridge-based cascaded multilevel inverter. IET Power Electronics, 10(7), 770-781.
• Odeh, C.I. (2015). Improved Three-Phase Five-Level PWM Switched Voltage Source Inverter. IET Power Electronics, 8(4), 524–535.
• Park, S.J.; Kang, F.S.; Lee, M.H.; and Kim, C.U. (2003). A New Single-Phase Five-Level PWM Inverter Employing a Deadbeat Control Scheme. IEEE TRANSACTIONS ON POWER ELECTRONICS, 18(3).
• Tuluhong, A.; Wang, W.; Li, Y.; and Xu, L. (2018). A Novel Hybrid T-Type Three-Level Inverter Based on SVPWM for PV Application. Journal of Electrical and Computer Engineering, 2018(9), 1- 12.
• Lee, M.Y. (2009). Three-Level Neutral-Point Clamped Matrix Converter Topology. PhD thesis, University of Nottingham.
• Subramanian, D.; and Rasheed, R. (2013). Modified Multilevel Inverter Topology for Driving a Single Phase Induction Motor. International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, 2(1).