A Modified Single Phase H-Bridge Inverter for High Power Applications with Power Quality Improvement


Article Preview

Various multilevel inverter topologies are widely being used for real power exchange, reactive power compensation, harmonic current mitigation on grid and industrial drive applications with fundamental frequency switching mode of gate control. Still so many topologies are being currently developed with reduced number of switches, improved waveform for power quality improvement with fundamental frequency switching and pwm switching gate control mode. This paper presents the performance analysis of modified H-bridge single phase inverter for high voltage and high power applications. The switching method has been selected to operate the inverter at fundamental frequency switching mode of gate control to be free from lower order harmonics. The inverter has the modulation technique with pre calculated switching angles to generate the required fundamental voltage with reduced Total Harmonic Distortion (THD). So, the switching losses have been reduced hence the efficiency is improved with Power Quality (PQ) improvement in voltage-current waveform. The DC input power is feed to the inverter from DC capacitor voltage divider source, contributed to give various dc voltage levels during fundamental frequency switching of different switching combinations for the generation of stepping output voltage. During dynamic load condition, the magnitude of input dc voltage level across each capacitor has not undergone through big swing to feed the power to the load without affecting generated output ac voltage. The performance of the proposed inverter has been analyzed for dynamic reactive load and induction motor. The MATLAB based simulations have been presented to validate the inverter operation for dynamic reactive load and industrial drive applications with pre calculated THD reduced switching conduction angles for PQ improvement in waveform.



Edited by:

R. Edwin Raj, M. Marsaline Beno and M. Carolin Mabel




S. Suresh et al., "A Modified Single Phase H-Bridge Inverter for High Power Applications with Power Quality Improvement", Applied Mechanics and Materials, Vol. 626, pp. 118-126, 2014

Online since:

August 2014




* - Corresponding Author

[1] Bhim Singh, R. Saha, Modeling of 18-Pulse STATCOM for Power System Applications, Journal on Power Electronics, Vol. 7, No. 2, April 2007, pp.146-158.

[2] B. Geethalakshmi and P. Dananjayan, A Combined Multipulse-Multilevel Inverter Suitable For High Power Applications, International Journal of Computer and Electrical Engineering, Vol. 2, No. 2, April, 2010, pp.257-261.

DOI: https://doi.org/10.7763/ijcee.2010.v2.146

[3] J. Rodriguez, J-S. Lai, F. Z. Peng, Multilevel inverters: A survey of topologies, controls, and applications, IEEE Tran. on Industrial Electronics, Aug 2002, Vol. 49, No. 4, pp.724-738.

[4] P. Palanivel, Subhransu Sekhar Dash, Control of Three Phase Cascaded Multilevel Inverter Using Various Noval Pulse Width Modulation Techniques, Latest Trends on circuits, pp.70-79.

[5] Peng.F. Z, Lai.J. S, McKeever. J. W. and Van Coevering.J., A multilevel voltage-source inverter with separate dc sources for static var generation, IEEE Tran. on Industry Applications, Sep. /Oct. 1996, Vol. 32, p.1130–1138.

DOI: https://doi.org/10.1109/28.536875

[6] Leon M. Tolbert, John N. Chiasson, Zhong Du and Keith J. McKenzie, Elimination of Harmonics in a Multilevel Converter With Nonequal DC Sources, IEEE transactions on industry applications, vol. 41, no. 1, january/february 2005, pp.75-82.

DOI: https://doi.org/10.1109/tia.2004.841162

[7] G.P. Adam, O. Anaya-Lara, G.M. Burt, D. Telford, B.W. Williams, J.R. McDonald, Modular multilevel inverter: pulse width modulation and capacitor balancing technique, IET Power Electron., 2010, Vol. 3, Iss. 5, p.702–715.

DOI: https://doi.org/10.1049/iet-pel.2009.0184

[8] Feel-soon Kang, A modified cascade transformer-based multilevel inverter and its efficient switching function, Electric Power Systems Research 79 (2009) 1648–1654.

DOI: https://doi.org/10.1016/j.epsr.2009.07.001

[9] S. Saad, L. Zellouma, Fuzzy logic controller for three-level shunt active filter compensating harmonics and reactive power, International journal on Electric Power Systems Research, vol. 79 , no. 10, 2009, pp.1337-1341.

DOI: https://doi.org/10.1016/j.epsr.2009.04.003

[10] Elena Villanueva, Pablo Correa, José Rodríguez, and Mario Pacas, Control of a Single-Phase Cascaded H-Bridge Multilevel Inverter for Grid-Connected Photovoltaic Systems, IEEE transactions on industrial electronics, vol. 56, no. 11, November 2009, pp.4399-4406.

[11] Gerardo Ceglia, Víctor Guzmán, Member, IEEE, Carlos Sánchez, Fernando Ibáñez, Julio Walter, and María I. Giménez, Member, IEEE, A New Simplified Multilevel Inverter Topology for DC–AC Conversion, IEEE transactions on power electronics, vol. 21, no. 5, september 2006, pp.1311-1319.

DOI: https://doi.org/10.1109/tpel.2006.880303

[12] Jeyraj Selvaraj and Nasrudin A. Rahim, Multilevel Inverter For Grid-Connected PV System Employing Digital PI Controller, ieee transactions on industrial electronics, vol. 56, no. 1, january 2009, pp.148-158.

DOI: https://doi.org/10.1109/tie.2008.928116

[13] Nasrudin A. Rahim, Jeyraj Selvaraj, Multistring Five-Level Inverter With Novel PWM Control Scheme for PV Application, IEEE transactions on industrial electronics, vol. 57, no. 6, june 2010, pp.

[14] Nasrudin A. Rahim, Krismadinata Chaniago, Jeyraj Selvaraj, Single Phase seven level grid connected inverter for photo voltaic system, IEEE transactions on industrial electronics, vol. 58, no. 6, june 2011, pp.2435-2443.

DOI: https://doi.org/10.1109/tie.2010.2064278