Browse > Article
http://dx.doi.org/10.6113/JPE.2016.16.6.2272

A Flyback-Assisted Single-Sourced Photovoltaic Power Conditioning System Using an Asymmetric Cascaded Multilevel Inverter  

Manoharan, Mohana Sundar (Department of Electrical Engineering, Soongsil University)
Ahmed, Ashraf (Department of Electrical Engineering, Soongsil University)
Park, Joung-Hu (Department of Electrical Engineering, Soongsil University)
Publication Information
Journal of Power Electronics / v.16, no.6, 2016 , pp. 2272-2283 More about this Journal
Abstract
This paper proposes a power conditioning system (PCS) for distributed photovoltaic (PV) applications using an asymmetric cascaded multilevel inverter with a single PV source. One of the main disadvantages of the cascaded multilevel inverters in PV systems is the requirement of multiple isolated DC sources. Using multiple PV strings leads to a compromise in either the voltage balance of individual H-bridge cells or the maximum power point tracking (MPPT) operation due to localized variations in atmospheric conditions. The proposed PCS uses a single PV source with a flyback DC-DC converter to facilitate a reduction of the required DC sources and to maintain the voltage balance during MPPT operation. The flyback converter is used to provide input for low-voltage H-bridge cells which processes only 20% of the total power. This helps to minimize the losses occurring in the proposed PCS. Furthermore, transient analyses and controller design for the proposed PCS in both the stand-alone mode and the grid-connection mode are presented. The feasibility of the proposed PCS and its control scheme have been tested using a 1kW hardware prototype and the obtained results are presented.
Keywords
Asymmetric cascaded multilevel inverter; Flyback converter; H-bridge cell; Isolated DC sources; Photovoltaic applications;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 E. Dall'Anese, S. V. Dhople, B. B. Johnson, and G. B. Giannakis, "Decentralized optimal dispatch of photovoltaic inverters in residential distribution systems," IEEE Trans. Energy Convers., Vol. 29, No. 4, pp. 957-967, Dec. 2014.   DOI
2 H. Xin, Y. Liu, Z. Qu, and D. Gan, "Distributed control and generation estimation method for integrating high-density photovoltaic systems," IEEE Trans. Energy Convers., Vol. 29, No. 4, pp. 988-996, Dec. 2014.   DOI
3 G.Masson, M. Latour, and D. Biancardi, "Global market outlook for photovoltaics until 2016," in European Photovoltaic Industry Association, 2012.
4 Y.-H. Liao and C.-M. Lai, "Newly-constructed simplified single-phase multistring multilevel inverter topology for distributed energy resources," IEEE Trans. Power Electron., Vol. 26, No. 9, pp. 2386-2392, Sep. 2011.   DOI
5 M. Boztepe, F, Guinjoan, G. Velasco-Quesada, S. Silvestre, A. Chouder, and E. Karatepe, "Global MPPT scheme for photovoltaic string inverters based on restriceted voltage window search algorith," IEEE Trans. Ind. Electron., Vol. 61, No. 7, pp. 3302-3312, Jul. 2014.   DOI
6 H. Patel and V. Agarwal, "A single-stage single-phase transformer-less doubly grounded grid-connected PV interface," IEEE Trans. Energy Convers., Vol. 24, No. 1, pp. 93-101, Mar. 2009.   DOI
7 M. Amirabadi, A. Balakrishnan, H. A. Toliyat, and W. C. Alexander, "High-frequency AC-link PV inverter," IEEE Trans. Ind. Electron., Vol. 61, No. 1, pp. 281-291, Jan. 2014.   DOI
8 E. Romero-Cadaval, G. Spagnuolo, L. G. Franquelo, C. A. Ramos-Paja, T. Sunito, and W. M. Xiao, "Grid-connected photovoltaic generation plants: components and operation," IEEE Ind. Electron. Mag., Vol. 7, No. 3, pp. 6-20, Sep. 2013.   DOI
9 H. Patela and V. Agarwal, "MPPT scheme for a PV-fed single-phase single-stage grid-connected inverter operating in CCM with only one current sensor," IEEE Trans. Energy Convers., Vol. 24, No. 1, pp. 256-263, Mar. 2009.   DOI
10 L. An and D. D. C. Lu, "Design of a single-switch DC/DC converter for a PV-battery-powered pump system with PFM+PWM control," IEEE Trans. Ind. Electron., Vol. 62, No. 2, pp. 910-921, Feb. 2015.   DOI
11 N. Sukesh, M. Pahlevaninezhad, and P. K. Jain, "Analysis and implementation of a single-stage flyback PV microinverter with soft switching," IEEE Trans. Ind. Electron., Vol. 61, No. 4, pp. 1819-1833, Apr. 2014.   DOI
12 R. S. Alishah, D. Nazarpour, S. H. Hosseini, and M. Sabahi, "Reduction of power electronic elements in multilevel converters using a new cascade structure," IEEE Trans. Ind. Electron., Vol. 62, No. 1, pp. 256-269, Jan. 2015.   DOI
13 E. Babaei, S. Laali, and Z. Bayat, "A single-phase cascaded multilevel inverter based on a new basic unit with reduced number of power switches," IEEE Trans. Ind. Electron., Vol. 62, No. 2, pp. 922-929, Feb. 2015.   DOI
14 B. Xiao, L. Hang, J. Mei, C. Riley, L. M. Tolbert, and B. Ozpineci, "Modular cascaded H-bridge multilevel PV inverter with distributed MPPT for grid-connected applications," IEEE Trans. Ind. Appl., Vol. 51, No. 2, pp. 1722-1731, Mar./Apr. 2015.   DOI
15 B. P. McGrath, D. G. Holmes, and W. Y. Kong, "A decentralized controller for a cascaded H-bridge multilevel converter," IEEE Trans. Ind. Electron., Vol. 61, No. 3, pp. 1169-1178, Mar. 2014.   DOI
16 M. Hamzeh, A. Ghazanfari, H. Mokhtari, and H. Karimi, "Integrating hybrid power source into an islanded MVMicrogrid using CHB multilevel inverter under unbalanced and nonlinear load conditions," IEEE Trans. Energy Convers., Vol. 28, No. 3, pp. 643-651, Sep. 2013.   DOI
17 H. R. Teymour, D. Sutanto, K. M. Muttaqi, and P. Ciufo, "Solar PV and battery storage integration using a new configuration of a three-level NPC inverter with advanced control strategy," IEEE Trans. Energy Convers., Vol. 29, No. 2, pp. 354-365, Jun. 2014.   DOI
18 S. Kouro, M. Malinowski, K. Gopakumar, J. Pou, L. G. Franquelo, B. Wu, J. Rodriguez, M. A. Perez, and J. I. Leon, "Recent advances and industrial applications of multilevel converters," IEEE Trans. Ind. Electron., Vol. 57, No. 8, pp. 2553-2580, Aug. 2010.   DOI
19 D. Balakrishnan and K Indiradevi. "Modified multilevel inverter topology with reduced switch count and a novel PWM control scheme," in International Conference on Computer Communication and Informatics (ICCCI), Jan. 2014.
20 E. Villanueva, P. Correa, J. Rodriguez, and M. Pacas, "Control of a single-phase cascaded H-bridge multilevel inverter for grid-connected photovoltaic systems," IEEE Trans. Ind. Electron., Vol. 56. No. 11, pp. 4399-4406, Nov. 2009.   DOI
21 S. K. Chattopadhay, C. Chandan, A. K. Sinha, and B. C. Pal, "Asymmetric multilevel inverter with quasi-linear power distribution ratio for grid connected photovoltaic converters," in IEEE International Symposium on Industrial Electronics (ISIE), pp. 1-6, May 2013.
22 A. C. Kyritsis, E. C. Tatakis, and N. P. Papanikolaou, "Optimum design of the current-source flyback inverter for decentralized grid-connected photovoltaic systems," IEEE Trans. Energy Convers., Vol. 23, No. 1, pp. 281-293, Mar. 2008.   DOI
23 G.-Y. Jeonga and S.-H. Kwon, "Improved single-stage AC-DC LED-drive flyback converter using the transformer-coupled lossless snubber," Journal of Electrical Engineering & Technology, Vol. 11, No. 3, pp. 644-652, May 2016.   DOI
24 M. S. Manoharan, A. Ahmed, H. W. Kim, and J. H. Park, "A single-source photovoltaic power conditioning system using asymmetric cascaded multilevel inverter," in 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia), Jun. 2015.
25 J.-M. Kwon, K.-H. Nam, and B.-H. Kwon, "Photovoltaic power conditioning system with line connection," IEEE Trans. Ind. Electron., Vol. 53 No. 4. pp. 1048-1054, Jun. 2006.   DOI
26 F. S. Kang, S. J. Park, M. H. Lee, and C. U. Kim, "An efficient multi-level synthesis approach and its application to a 27-level inverter," IEEE Trans. Ind. Electron., Vol. 52. No. 6, pp. 1600-1606, Dec. 2005.   DOI
27 A. K. Panda and Y. Suresh, "Research on cascade multilevel inverter with single DC source using three-phase transformers," International Journal of Electrical Power & Enery Systems, Vol. 40, No. 1, pp.9-20, Sep. 2010.
28 J. Rodriguez, J.-S. Lai, and F. Z. Peng, "Multilevel inverters: a survey of topologies, controls and applications," IEEE Trans. Ind. Electron., Vol. 49. No. 4, pp. 724-738, Aug. 2002.   DOI
29 B. P. McGrath, D. G. Holmes, M. Manjrekar, and T. A. Lipo, "An improved modulation strategy for a hybrid multilevel inverter," in IEEE Industry Applications Conference, pp. 2086-2093, Oct. 2000.
30 T. V. Thang, N. M. Thao, J. H. Jang, and J.-H. Park, "Analysis and design of grid-connected photovoltaic systems with multiple- integrated converters and a pseudo-DC-link inverter," IEEE Trans. Ind. Electron., Vol. 61, No. 7, pp. 3377-3386, Jul. 2014.   DOI
31 Y. Li and R. Oruganti, "A low cost flyback CCM inverter for AC module application," IEEE Trans. Power Electron., Vol. 27, No. 3, pp. 1295-1303, Mar. 2012.   DOI
32 J.-W. Kim and J.-I. Ha, "Cell balancing method in flyback converter without cell selection switch of multi-winding transformer," Journal of Electrical Engineering & Technology, Vol. 11, No. 2, pp. 367-376, Mar. 2016.   DOI
33 J. Dixon, J. Pereda, C. Castillo, and S. Bosch, "Asymmetrical multilevel inverter for traction drives using only one DC supply," IEEE Trans. Veh. Technol., Vol. 59. No. 8, pp. 3736-3743, Oct. 2010.   DOI