DC link capacitor voltage balancing in three level neutral point clamped inverter

Mekhilef, Saad and Khudhur, H.I. and Belkamel, H. (2012) DC link capacitor voltage balancing in three level neutral point clamped inverter. In: 2012 IEEE 13th Workshop on Control and Modeling for Power Electronics, COMPEL 2012, 2012, Kyoto.

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Abstract

Multilevel inverters are becoming increasingly popular for high and medium power applications. The diode clamped multilevel inverter (DCMLI) is an attractive high voltage multilevel inverter due to its robustness. The deviating voltage at the neutral point remains always a distracting feature in NPC inverter. For this reason DC link capacitors voltage balancing is crucial task in such configuration. The focus of this paper is a three-level three-phase neutral point clamped inverter. A modulation technique that balances the voltage in the DC link capacitors is presented. A Feedback voltage control method has been employed and a space vector pulse width modulation (SVPWM) is used as flexible technique to generate pulses that maintain a balanced DC link. The balancing is limited to an acceptable level without the use of the external active capacitor balancing circuit. To validate the effectiveness of the proposed method both simulation and experimental results are provided.

Item Type:	Conference or Workshop Item (Paper)
Funders:	UNSPECIFIED
Additional Information:	Conference code: 92840 Export Date: 16 November 2012 Source: Scopus Art. No.: 6251754 doi: 10.1109/COMPEL.2012.6251754 Language of Original Document: English Correspondence Address: Mekhilef, S.; Department of Electrical Engineering, University of Malaya, Kuala Lumpur, Malaysia; email: saad@um.edu.my References: Chenchen, W., Yondong, L., A survey on topologies of multilevel converters and study of two novel topologies (2009) Power Electronics and Motion Control Conference, 2009. IPEMC '09. IEEE 6th International, pp. 860-865; Rodriguez, J., Jih-Sheng, L., Fang Zheng, P., Multilevel inverters: A survey of topologies, controls, and applications (2002) Industrial Electronics, IEEE Transactions on, 49, pp. 724-738; Rodriguez, J., Bernet, S., Bin, W., Pontt, J.O., Kouro, S., Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives (2007) Industrial Electronics, IEEE Transactions on, 54, pp. 2930-2945; Celanovic, N., Boroyevich, D., A fast space-vector modulation algorithm for multilevel threephase converters (2001) Industry Applications, IEEE Transactions on, 37, pp. 637-641; Mekhilef, S., Abdul Kadir, M.N., Voltage Control of Three-Stage Hybrid Multilevel Inverter Using Vector Transformation (2010) Power Electronics, IEEE Transactions on, 25, pp. 2599-2606; Ogasawara, S., Akagi, K., A vector control system using a neutral-point-clamped voltage source PWM inverter (1991) Industry Applications Society Annual Meeting, 1991., Conference Record of the 1991 IEEE, 1, pp. 422-427; Newton, C., Sumner, M., Neutral point control for multi-level inverters: Theory, design and operational limitations (1997) Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE, 2, pp. 1336-1343; Ahmed, M.E., Mekhilef, S., Design and Implementation of a MultiLevel Three-Phase Inverter with Less Switches and Low OutputVoltage Distortion (2009) Journal of Power Electronics, 9, pp. 594-604. , July; Mekhilef, S., Omar, A.M., Rahim, N.A., Modeling of three-phase uniform symmetrical sampling digital PWMfor power converter (2007) IEEE Transactions on IndustrialElectronics, 54, pp. 427-432. , February; Mekhilef, S., Saidur, R., Safari, A., A reviewon solar energy use in industries (2011) Renewable and Sustainable Energy Reviews, 15, pp. 1777-1790. , Elsevier, May; Kadir, M.N.A., Mekhilef, S., Ping, H.W., Voltage Vector Control of a Hybrid Three-StageEighteen-Level Inverter by Vector Decomposition (2010) IET Transaction OnPower Electronics, 3, pp. 601-611. , July; Ustun, T.S., Mekhilef, S., Effects of a Static Synchronous Series Compensator (SSSC)Based on Soft Switching 48-Pulse PWM Inverter on the Power Demand from theGrid (2010) Journal of Power Electronics, 10, pp. 85-90. , January; Mekhilef, S., Abdul Kadir, M.N., Novel Vector Control Method for Three-StageHybrid Cascaded Multilevel Inverter (2011) IEEE Transactions on Industrial Electronics, 58, pp. 1339-1349. , April; Safari, A., Mekhilef, S., Simulationand Hardware Implementation of Incremental Conductance MPPT with Direct ControlMethod Using Cuk Converter (2011) IEEE Transactions on IndustrialElectronics, 58, pp. 1154-1161. , April; Ustun, T.S., Mekhilef, S., Designand Implementation of Static Synchronous Series Compensator with a soft-switching H-bridge Inverter with DSP-Based Synchronization Control (2010) International Review of Electrical Engineering (IREEE), 5, pp. 1347-1353. , July-August; Abdul Kadir, M.N., Mekhilef, S., Dual Vector ControlStrategy for a Three-Stage Hybrid Cascaded Multilevel Inverter (2010) Journal OfPower Electronics, 10 (2), pp. 155-164
Uncontrolled Keywords:	Diode clampedmultilevel inverter, feedback voltage control, space vector modulation, Control methods, Dc link capacitor, DC link capacitors voltage balancing, DC links, Diode-clamped multilevel inverters, Feedback voltages, High voltage, Modulation techniques, Multilevel inverter, Neutral point clamped inverters, Neutral points, NPC inverters, Power applications, Space vector pulse width modulation, Three-level, Three-level neutral point clamped, Capacitors, Electric inverters, Modulation, Power electronics, Pulse width modulation, Vector spaces, Voltage control, Power converters.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Engineering
Depositing User:	Mr Jenal S
Date Deposited:	08 Feb 2013 01:25
Last Modified:	25 Oct 2019 04:03
URI:	http://eprints.um.edu.my/id/eprint/4716

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