Multilevel NPC Converters in Parallel Connection for Power Conditioning Systems

Abstract:

This paper investigates a multilevel combined NPC converter for medium-and high-power energy storage systems and active power filters. The proposed multilevel NPC converter is composed of a parallel connection of multiple NPC converters using the current sharing reactors and involves the phase shifted PWM strategy for better energy quality performance. Using the switching function-based mathematical model, the proposed multilevel converter is evaluated to show the energy quality performance and fault tolerance of an energy storage system or active power filter. In addition, the switching frequency of circulating currents is analyzed to obtain its relationship with the converter parameters and maximum sharing reactor current ripple. The performance of the proposed multilevel converter is verified by simulation.

• Periodical: Applied Mechanics and Materials (Volume 792)
• Pages: 189-196
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.792.189
• Online since: September 2015
• Authors: Maxim Dybko, Sergey Brovanov, Hong Hee Lee
• Keywords: Circulating Currents, Current Sharing Technique, Multilevel Converters, Parallel Connection, Phase Shifted PWM

References

[1] M. El-Habrouk, M. K. Darwish, P. Mehta, Active power filters: A review. IEE Proc. -Electr. Power Appl., Vol. 147, No. 5, pp.403-413, September (2000).

DOI: 10.1049/ip-epa:20000522

[2] S. Vazquez, S. M. Lukic, E. Galvan, L. G. Franquelo, J. M. Carrasco, Energy Storage Systems for Transport and Grid Applications, IEEE Transactions On Industrial Electronics, Vol. 57, No. 12, pp.3881-3895, (2010).

DOI: 10.1109/tie.2010.2076414

[3] J. Chen, S. Song, Z. Wang, Analysis and Implement of Thyristor-based STATCOM, International Conference on Power System Technology, pp.1-5, (2006).

DOI: 10.1109/icpst.2006.321762

[4] K. S. Rani, K. Porkumaran, Multilevel Shunt Active Filter based on Sinusoidal Subtraction Methods under Different Load Conditions, IEEE Region 8 SIBIRCON, pp.692-697, (2010).

DOI: 10.1109/sibircon.2010.5555362

[5] H. Akagi, H. Fujita, S. Yonetani, Yosuke Kondo, A 6. 6-kV Transformerless STATCOM Based on a Five-Level Diode-Clamped PWM Converter: System Design and Experimentation of a 200-V 10-kVA Laboratory Model, IEEE Transactions On Industry Applications, Vol. 44, No. 2, pp.672-680.

DOI: 10.1109/tia.2008.916713

[6] M. Rastogi, P. Hammond, S. Simms, Multi-Level active filter, US Patent 7405498 B2, Jul. 29, (2008).

[7] T. Bernhard, M. Dommaschk, J. Dorn, I. Euler, F. Karlecik-Maier, J. Lang, J. -W. Strauss, Q. -B. Tu, C. Wittstock, K. Wűrflinger, Active Filter having a Multilevel Topology, US patent 7969238 B2, Jun. 28, (2011).

[8] T. Beechner, J. Sun, Harmonic Cancellation under Interleaved PWM with Harmonic Injection, IEEE Power Electronics Specialists Conference, PESC, pp.1515-1521.

DOI: 10.1109/pesc.2008.4592152

[9] M. Baumann, J. W. Kolar, Parallel Connection of Two Three-Phase Three-Switch Buck-Type Unity-Power-Factor Rectifier Systems With DC-Link Current Balancing, IEEE Transactions On Industrial Electronics, Vol. 54, No. 6, pp.3042-3053, December (2007).

DOI: 10.1109/tie.2007.907006

[10] C. -T. Pan, Y. -H. Liao, Modeling and Coordinate Control of Circulating Currents in Parallel Three-Phase Boost Rectifiers, IEEE Transactions On Industrial Electronics, Vol. 54, No. 2, pp.825-838, April (2007).

DOI: 10.1109/tie.2007.891776

[11] M. A. Dybko, S. V. Brovanov, S. A. Kharitonov, Mathematical Simulation Technique for Power Systems Based on Diode-clamped Multilevel VSC, IEEE Region 8 Conference, EuroCon, pp.941-948, (2013).

DOI: 10.1109/eurocon.2013.6625095

[12] G. Zinoviev, M. Dybko, S. Brovanov, S. Kharitonov, Unified Analysis Technique for Energy Quality Factors estimation of NPC Multilevel VSC for Energy Storage Systems, 15th European Conference on Power Electronics and Applications, EPE, pp.1-9, (2013).

DOI: 10.1109/epe.2013.6634489