Document Type : Research Articles

Authors

Department of Electrical Engineering, University of Zanjan

Abstract

Multilevel inverters as a main component of electrical systems have been discussed over the past decade. Todays, improving their performance is one of the important challenges that has led to many studies in their topology and control system. In this paper, a new topology of symmetrical multi-level inverters is provided that is able to feed inductive loads. The proposed topology has fewer power elements such as IGBTs, driver circuits, diodes and dc voltages. To increase the number of output voltage levels, several basic topology can be in cascaded structure. Comparison of proposed inverter topology with some conventional symmetrical topologies shows that the proposed topology has better efficiency in aspects of the number of IGBTs, losses and blocked voltage blocked in the switches. The performance and efficiency of the proposed inverter are verified by simulation and experimental results of a 9-level symmetrical inverter.The quality of a multi-level inverter specifies by its number of output levels.

Keywords

Main Subjects

[1] Y. Cheng, C. Qian, M. L. Crow, S. Pekarek, and S. Atcitty,
"A comparison of diode-clamped and cascaded multilevel
converters for a STATCOM with energy storage," IEEE
Transactions on Industrial Electronics, vol. 53, no. 5, pp.
1512-1521, 2006.
[2] J. Rodríguez, S. Bernet, B. Wu, J. O. Pontt, and S. Kouro,
"Multilevel voltage-source-converter topologies for
industrial medium-voltage drives," IEEE Transactions on
industrial electronics, vol. 54, no. 6, pp. 2930-2945, 2007.
[3] R. Samanbakhsh and A. Taheri, "Reduction of Power
Electronic Components in Multilevel Converters Using
New Switched Capacitor-Diode Structure," in IEEE
Transactions on Industrial Electronics, vol. 63, no. 11,
pp. 7204-7214, Nov. 2016.
[4] J. A. Barrena, L. Marroyo, M. Á. R. Vidal, and J. R. T.
Apraiz, "Individual voltage balancing strategy for PWM
cascaded H-bridge converter-based STATCOM," IEEE
Transactions on Industrial Electronics, vol. 55, no. 1, pp.
21-29, 2008.
[5] Asghar Taheri and Hosein Samsami, “New topology of a
switched-capacitor-based multilevel inverter with a single
DC power supply”, IET Power Electronics, 2019, DOI:
10.1049/iet-pel.2018.5087.
[6] S. P. Gautam, L. Kumar, and S. Gupta, "Hybrid topology of
symmetrical multilevel inverter using less number of
devices," IET Power Electronics, vol. 8, no. 11, pp.
2125-2135, 2015.
[7] F. Sedaghati and N. Hashemipour, "Symmetric and
Asymmetric Configurations for a Multilevel Inverter Using
Less Number of Power Switches," International Journal of
Industrial Electronics, Control and Optimization, vol. 1, no.
2, pp. 91-101, 2018.
[8] A. Shukla, A. Ghosh, and A. Joshi, "Improved multilevel
hysteresis current regulation and capacitor voltage balancing
schemes for flying capacitor multilevel inverter," IEEE
Transactions on Power Electronics, vol. 23, no. 2, pp.518-529, 2008.
[9] Q. Song and W. Liu, “Control of a cascade STATCOM with
star configuration under unbalanced conditions,” IEEE Trans.
Power Electron., vol. 24, no. 1, pp. 45–58, Jan. 2009.
[10] H. Samsami, A. Taheri, and R. Samanbakhsh, "New
bidirectional multilevel inverter topology with staircase
cascading for symmetric and asymmetric structures," IET
Power Electronics, vol. 10, no. 11, pp. 1315-1323, 2017.
[11] M. Hagiwara, K. Nishimura, and H. Akagi, “A
medium-voltage motor drive with a modular multilevel
PWM inverter,” IEEE Trans. Power Electron, vol. 25, no. 7,
pp. 1786–1799, Jul. 2010.
[12] J.-S. Lai and F. Z. Peng, "Multilevel converters-a new breed
of power converters," IEEE Transactions on industry
applications, vol. 32, no. 3, pp. 509-517, 1996.
[13] L. M. Tolbert, J. Chiasson, K. McKenzie, and Z. Du,
"Elimination of harmonics in a multilevel converter with non
equal DC sources," in Applied Power Electronics Conference
and Exposition, 2003. APEC'03. Eighteenth Annual IEEE,
2003, vol. 1, pp. 589-595: IEEE.
[14] K. Ding, K.W.E. Cheng, and Y.P. Zou, “Analysis, of an
asymmetric modulation methods for cascaded multi level
inverters,” IET Power Electron., vol. 5, no. 1, pp. 74-85,
2012.
[15] S. Laali, K. Abbaszade, and H. Lesani, "New hybrid control
methods based on multi-carrier PWM techniques and charge
balance control methods for cascaded multilevel converters,"
in Electrical and Computer Engineering (CCECE), 2011
24th Canadian Conference on, 2011, pp. 000243-000246:
IEEE.
[16] N. Farokhnia, S.H. Fathi, N. Yousefpoor, and M.K.
Bakhshizadeh“ Minimization of total harmonic distortion in
a cascaded multilevel inverter by regulating of voltages dc
sources,” IET Power Electron., vol. 5, no. 1, pp. 106-114,
2012.
[17] J. Napoles, A.J. Watson, and J.J. Padilla, “Selective
harmonic mitigation technique for cascaded H-bridge
converter with non equal dc link voltages,” IEEE Trans. Ind.
Electron., vol. 60,no. 5, pp. 1963-1971, May 2013.
[18] P. Hammond.: 'A new approach to enhance power quality
for medium voltage ac drives', IEEE Trans. Industry
Application, 1997, 33, pp. 202-208
[19] A. Nabae, I. Takahashi, and H. Akagi, "A new
neutral-point-clamped PWM inverter," IEEE Transactions
on industry applications, no. 5, pp. 518-523, 1981.
[20] C. Feng, J. Liang, and V. G. Agelidis, "Modified
phase-shifted PWM control for flying capacitor multilevel
converters," IEEE Transactions on Power Electronics, vol.
22, no. 1, pp. 178-185, 2007.
[21] J. Rodriguez, J.-S. Lai, and F. ZhengPeng, “Multilevel
inverters: A survey of topologies, controls, applications,”
IEEE Trans. Ind. Electron., vol. 49,no. 4, pp. 724–738, Aug.
2002.
[22] S. Kouro, M. Malinowski, K. Gopakumar, J. Pou, L.
Franquelo, B. Wu,J. Rodriguez, M. Perez, and J. Leon,
“Recent advances and industrial applications of multilevelconverters,” IEEE Trans. Ind. Electron., vol. 57,no. 8, pp.
2553–2580, Aug. 2010.
[23] K. K. Gupta and S. Jain, "A novel multilevel inverter based
on switched DC sources," IEEE Transactions on Industrial
Electronics, vol. 61, no. 7, pp. 3269-3278, 2014.
[24] S. De, D. Banerjee, K. Gopakumar, R. Ramchand, and C.
Patel, "Multilevel inverters for low-power application," IET
Power Electronics, vol. 4, no. 4, pp. 384-392, 2011.
[25] C.-C. Hua, C.-W. Wu, and C.-W. Chuang, "A novel dc
voltage charge balance control for cascaded inverters," IET
Power Electronics, vol. 2, no. 2, pp. 147-155, 2009.
[26] M. Malinowski, K. Gopakumar, J. Rodriguez, and M. A.
Perez, "A survey on cascaded multilevel inverters," IEEE
Transactions on industrial electronics, vol. 57, no. 7, pp.
2197-2206, 2010.
[27] C. Rech and J. R. Pinheiro, “Hybrid multilevel converters:
Unified analysis and design considerations,” IEEE Trans. Ind.
Electron., vol. 54, no. 2, pp. 1092–1104, Apr. 2007.
[28] C. Rech and J. R. Pinheiro, “Line current harmonics
reduction in multipulse connection of asymmetrically loaded
rectifiers,” IEEE Trans. Ind.Electron., vol. 52, no. 3, pp.
640–652, Jun. 2005.
[29] S. Laali, K. Abbaszadeh, and H. Lesani, "A new algorithm
to determine the magnitudes of dc voltage sources in
asymmetric cascaded multilevel converters capable of using
charge balance control methods," in Electrical Machines and
Systems (ICEMS), 2010 International Conference on, 2010,
pp. 56-61: IEEE.
[30] E. Najafi and A. H. M. Yatim, "Design and implementation
of a new multilevel inverter topology," IEEE Transactions
on industrial electronics, vol. 59, no. 11, pp. 4148-4154,
2012.
[31] K. Ramani, M. A. J. Sathik, and S. Sivakumar, "A new
symmetric multilevel inverter topology using single and
double source sub-multilevel inverters," Journal of Power
Electronics, vol. 15, no. 1, pp. 96-105, 2015.
[32] E. Babaei and S. H. Hosseini, "New cascaded multilevel
inverter topology with minimum number of switches,"
Energy Conversion and Management, vol. 50, no. 11, pp.
2761-2767, 2009.
[33] S. Rohner, S. Bernet, M. Hiller, and R. Sommer,
“Modulation, losses, and semiconductor requirements
of modular multilevel converters,” IEEE Trans. Ind.
Electron., vol. 57, no. 8, pp. 2633–2642, Aug. 2010.
[34] M. Perez, J. Rodriguez, J. Pontt, and S. Kouro,
“Power distribution in hybrid multi-cell converter with
nearest level modulation,” in Proc. ISIE IEEE
International Symposiumon Ind. Elelctron, pp.
736-741, 2007.