Power Converter for Dual-Power PV-Grid Energy System Utilizing Cascaded Multilevel Inverter

Abstract:

The dual-power PV-grid system was introduced to manipulate the lower tariff rate at off-peak period and to reduce the capital installation cost of PV energy system. The power converter in the PV energy system is used to process solar energy captured by PV modules into usable electrical energy. In the dual-power PV-grid system, the power converter component is consists of a boost regulator to boost and regulate PV outputs to fixed voltage of 240V, 50Hz, a maximum power point tracker (MPPT) to derive maximum power from PV panels and a three operation modes of the battery converter to regulate charging current/discharging current under various PV output and load variation. In this project, a reduced switch and increased level of cascaded H-bridge multilevel inverter was introduced to convert the direct current (DC) output of the solar energy to alternating current (AC) signal to supply an AC load or to be integrated to the grid system. By adapting selective harmonic elimination (SHE) switching strategy, the inverter produces 21 levels of stepped sinusoidal output signal with resultant total harmonics distortion (THD) of 3.90%.

• Periodical: Advanced Materials Research (Volume 925)
• Pages: 505-509
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.925.505
• Online since: April 2014
• Authors: Intan Rahayu Ibrahim*, Ahmad Maliki Omar, Zakaria Hussain
• Keywords: Cascaded Multilevel Inverter, Dual-Power Pv-Grid System, Multilevel Inverter (MLI), Power Converter System, Pv Energy System

References

[1] I.R. Ibrahim, et al., Dual-power PV-grid Energy System Utilizing Multilevel Inverter - An Overview and Alternative to PV Energy System in Malaysia, (2011).

DOI: 10.1109/peoco.2011.5970453

[2] I.R. Ibrahim, et al., Modeling and simulation of the dual-power PV-grid energy system utilizing multilevel inverter, Proc. 2011 IEEE International Conference on Control System, Computing and Engineering (ICCSCE), 2011, pp.575-579.

DOI: 10.1109/iccsce.2011.6190592

[3] R. Seyezhai and B.L. Mathur, Hybrid cascaded H-bridge multilevel inverter for fuel cell power conditioning systems, IEEE, 2008, pp.1-5.

DOI: 10.1109/upec.2008.4651661

[4] S.Y. Mosazadeh, et al., New high frequency switching method of cascaded multilevel inverters in PV application, Proc. 2012 International Conference on Power Engineering and Renewable Energy (ICPERE), 2012, pp.1-6.

DOI: 10.1109/icpere.2012.6287235

[5] L.M. Tolbert and F.Z. Peng, Multilevel converters as a utility interface for renewable energy systems, IEEE, 2002, pp.1271-1274.

[6] M. Sadikin, et al., High-frequency link DC for power quality improvement of stand-alone PV system in cascaded multilevel inverter, Proc. 2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS), 2013, pp.597-601.

DOI: 10.1109/peds.2013.6527089

[7] J. Lai and F. Peng, Multilevel Converters - A new Breed of Power Converters , IEEE Transactions on Industry Applications, vol. 32, no. 3, 1996, pp.509-517.

DOI: 10.1109/28.502161

[8] Y.S. Lai and F.S. Shyu, Topology for hybrid multilevel inverter, IET, 2003, pp.449-458.

[9] S. Daher, et al., Multilevel Inverter Topologies for Stand-alone PV Systems , IEEE Transactions on Industrial Electronics, vol. 55, no. 7, 2008, pp.2703-2712.

DOI: 10.1109/tie.2008.922601

[10] H. Taghizadeh and M. Tarafdar Hagh, Harmonic elimination of cascade multilevel inverters with nonequal dc sources using particle swarm optimization, IEEE Transactions on Industrial Electronics, vol. 57, no. 11, 2010, pp.3678-3684.

DOI: 10.1109/tie.2010.2041736

[11] M.S.A. Dahidah, et al., SHE-PWM and optimized DC voltage levels for cascaded multilevel inverters control, Proc. ISIEA 2010 - 2010 IEEE Symposium on Industrial Electronics and Applications, 2010, pp.143-148.

DOI: 10.1109/isiea.2010.5679479

[12] K. El-Naggar and T.H. Abdelhamid, Selective harmonic elimination of new family of multilevel inverters using genetic algorithms, Energy Conversion and Management, vol. 49(1), 2008, pp.89-95.

DOI: 10.1016/j.enconman.2007.05.014

[13] M.H. Etesami, et al., A method based on Imperialist Competitive Algorithm (ICA), aiming to mitigate harmonics in multilevel Inverters, Proc. 2011 2nd Power Electronics, Drive Systems and Technologies Conference, PEDSTC 2011, 2011, pp.32-37.

DOI: 10.1109/pedstc.2011.5742441

[14] J. Kennedy and R. Eberhart, Particle swarm optimization, Proc. Neural Networks, 1995. Proceedings., IEEE International Conference on, 1995, pp.1942-1948 vol. (1944).

[15] P. Maruthu Pandi and N. Devarajan, Optimization of power quality in cascaded multilevel inverter-genetic algorithm approach, Proc. 2010 2nd International Conference on Computing, Communication and Networking Technologies, ICCCNT 2010, (2010).

DOI: 10.1109/icccnt.2010.5591838