Passive Voltage Balancing In Modular Multilevel Converter During Precharge: Analysis And Design

Authors

  • Gean Jacques Maia de Sousa Power Electronics Institute - Federal University of Santa Catarina, Florianópolis – Santa Catarina, Brazil
  • Luiz H. T. Schmidt Department of Automation and Systems - Federal University of Santa Catarina, Florianópolis – Santa Catarina, Brazil
  • Marcelo Lobo Heldwein Power Electronics Institute - Federal University of Santa Catarina, Florianópolis – Santa Catarina, Brazil
  • Daniel Juan Pagano Department of Automation and Systems - Federal University of Santa Catarina, Florianópolis – Santa Catarina, Brazil

DOI:

https://doi.org/10.18618/REP.2020.4.0042

Keywords:

Modular Multilevel Converter, Non linear Dynamics, stability

Abstract

The modular multilevel converter is composed of many equal submodules connected in series, each having to ideally withstand the same voltage and current stresses. The resulting configuration when each SM capacitor feeds its own auxiliary power supply is unstable during at least part of the converter precharge process. SM capacitor voltages can diverge until a protection trips in. The system can be stabilized by adding a balancing resistor in parallel to each SM capacitor. In this work, models for the dc-side precharge of the modular multilevel converter are proposed and its dynamics are analyzed in depth. The worst case parameter combination is found by running the models for all possible combinations within certain discrete ranges. A conservative estimation of the balancing resistor value is proposed by analysis of the results.

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Author Biographies

Gean Jacques Maia de Sousa, Power Electronics Institute - Federal University of Santa Catarina, Florianópolis – Santa Catarina, Brazil

, received the B.S. degree in electrical engineering from the Federal University of Ceará (UFC), Fortaleza, Brazil, in 2010 and the M.S. degree from the University of Santa Catarina (UFSC), Florianópolis, Brazil, in 2014. He is currently working towards the Ph.D. degree at the same institution. His main research interests include multilevel converters and modelling and control for power electronics. Gean is a student member of the SOBRAEP.

Luiz H. T. Schmidt, Department of Automation and Systems - Federal University of Santa Catarina, Florianópolis – Santa Catarina, Brazil

, received the B.S. degree in automation and control engineering in 2016 and M.S. degree in automation and systems engineering in 2020, both from the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil. His areas of interest are: power electronics, control systems and nonlinear dynamical systems. Luiz is a student member of the SOBRAEP.

Marcelo Lobo Heldwein, Power Electronics Institute - Federal University of Santa Catarina, Florianópolis – Santa Catarina, Brazil

, received the B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Brazil, in 1997 and 1999, respectively, and his Ph.D. degree from the Swiss Federal Institute of Technology (ETH Zurich), Switzerland, in 2007. He is currently an Associate Professor with the Department of Electronics and Electrical Engineering at the UFSC. From 1999 to 2003, he worked with industry at the Power Electronics Institute and at Emerson, Brazil and Sweden. He was a postdoc at the ETH Zurich and at the UFSC (2007– 2009). His research interests include Power Electronics, Advanced Power Distribution Technologies and EMC.

Daniel Juan Pagano, Department of Automation and Systems - Federal University of Santa Catarina, Florianópolis – Santa Catarina, Brazil

, received the B.Sc. degree in Telecommunications Engineering from National University of La Plata, Argentine, in 1985. M.Sc. degree in Electrical Engineering from Federal University of Santa Catarina, Brazil, in 1989 and Ph.D. degree in Robotics, Automation and Electronics from the University of Seville, Spain, in 1999. He is currently a Professor at the Dept. of Automation and Systems, Federal University of Santa Catarina, Brazil. From Sept. 2006 to Oct. 2007, he was a Visiting Professor at Dept. of Engineering Mathematics, University of Bristol, UK. From Jan. 2016 to Dec. 2016, he was a Visiting Professor at the Australian Energy Research Institute, UNSW, Sydney. He is a member of SOBRAEP and his main research interests include nonlinear systems, bifurcation analysis, nonlinear control and power electronics.

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Published

2020-12-31

How to Cite

[1]
G. Jacques Maia de Sousa, L. H. T. Schmidt, M. Lobo Heldwein, and D. Juan Pagano, “Passive Voltage Balancing In Modular Multilevel Converter During Precharge: Analysis And Design”, Eletrônica de Potência, vol. 25, no. 4, pp. 415–426, Dec. 2020.

Issue

Vol. 25 No. 4 (2020)

Section

Original Papers

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