Design of Cascaded Modular Multilevel Converter for Grid Connected PV System
|International Journal of Electrical and Electronics Engineering|
|© 2019 by SSRG - IJEEE Journal|
|Volume 6 Issue 4|
|Year of Publication : 2019|
|Authors : Tetali Swathi, V S N Narasimha Raju, K Sainadh Singh, G.Srinivas Reddy|
How to Cite?
Tetali Swathi, V S N Narasimha Raju, K Sainadh Singh, G.Srinivas Reddy, "Design of Cascaded Modular Multilevel Converter for Grid Connected PV System," SSRG International Journal of Electrical and Electronics Engineering, vol. 6, no. 4, pp. 13-21, 2019. Crossref, https://doi.org/10.14445/23488379/IJEEE-V6I4P103
Today renewable energy sources are becoming more popular with ever increasing energy demand and environmental pollution due to non-renewable energy sources. Among the renewable energy sources, major portion of energy is generated using Photovoltaic system. Grid connected photovoltaic systems are gaining more importance. Large-scale grid connected PV systems can be easily and effectively interfaced with the modular multilevel converters when compared with conventional DC-DC converters. As modular multilevel converters have unique advantages like enhanced energy harvesting capability, scalability etc. they can be used for many applications such as STATCOM, harmonic compensator and so on. PV systems face tough challenges such as output voltage over modulation and power flow control due to irregular output voltages from PV arrays. This paper proposes a decoupled active and reactive power control method to improve the system performance. A 3-MW, 12kV PV system with the proposed control strategy is modelled and the results are verified using MATLAB simulation.
Multilevel converters, decoupled active and reactive power control, photovoltaic systems.
 Y.Bo, L. Wuhua, Z. Yi, and H. Xiangning, “Design and analysis of a grid connected photovoltaic power system,” IEEE Trans. Power Electron., vol. 25, no. 4, pp. 992–1000, Apr. 2010.
 J.Ebrahimi, E. Babaei, and G. B. Gharehpetian, “A new topology of cascaded multilevel converters with reduced number of components for high-voltage applications,” IEEE Trans. Power Electron., vol. 26, no. 11, pp. 3109–3118, Nov. 2011.
 L.Nousiainen, and J. Puukko, “Photovoltaic generator as an input source for power electronic converters,” IEEE Trans. Power Electron., vol. 28, no. 6, pp. 3028-3037, June 2013.
 D.Meneses, F. Blaabjery, O. Garcia, and J. A. Cobos, “Review and comparison of step-up transformerless topologies for photovoltaic AC-module application,” IEEE Trans. Power Electron., vol. 28, no. 6, pp. 2649-2663, June 2013.
 S.Kjaer, J. Pedersen, and F. Blaabjerg, “A review of single-phase grid connected inverters for photovoltaic modules,” IEEE Trans. Ind. Appl., vol. 41, no. 5, pp. 1292–1306, Sep./Oct. 2005.
 J.Mei, B. Xiao, K. Shen, L. M. Tolbert, and J. Y. Zheng, “Modular multilevel inverter with new modulation method and its application to photovoltaic grid-connected generator,” IEEE Trans. Power Electron., vol. 28, no. 11, pp. 5063-5073, Nov. 2013.
 Y.Zhou, L. Liu, and H. Li, “A high performance photovoltaic module-integrated converter (MIC) based on cascaded quasi-Z-source Inverters (qZSI) using eGaN FETs,” IEEE Trans. Power Electron., vol.28, no.6, pp.2727-2738, June 2013.
 L.Liu, H. Li, and Y. Zhou, “A cascaded photovoltaic system integrating segmented energy storages with self-regulating power distribution control and wide range reactive power compensation,” IEEE Trans. Power Electron.,vol.26, no.12, pp.3545-3559, Dec. 2011.
 Q.Li and P. Wolfs, “A review of the single phase photovoltaic module integrated converter topologies with three different DC link configurations,” IEEE Trans. Power Electron., vol. 23, no. 3, pp. 1320–1333, May 2008.
 L.Zhang, K. Sun, Y. Xing, L. Feng, and H. Ge, “A modular grid-connected photovoltaic generation system based on DC bus,” IEEE Trans. Power Electron., vol. 26, no. 2, pp. 523–531, Feb. 2011.
 L.M. Tolbert and F. Z. Peng, “Multilevel converters as a utility interface for renewable energy systems,” IEEE Power Engineering Society Summer Meeting, Seattle, Washington, Jul. 2000, pp. 1271-1274.
 M.Malinowski, K. Gopakumar, J. Rodriguez and M. A. Perez, “A survey on cascaded multilevel inverters,” IEEE Trans. Ind. Electron., Vol.57, No.7, pp.2197-2206, July 2010.
 S.Harb, and R. S. Balog, “Reliability of candidate photovoltaic module-integrated-inverter (PV-MII) topologies- a usage model approach,” IEEE Trans. Power Electron., vol. 28, no. 6, pp. 3019-3027, June 2013.
 L.Liu, H. Li, and Y. Xue “A coordinated active and reactive power control strategy for grid-connected cascaded photovoltaic (PV) system in high voltage high power applications” in the 28th IEEE Applied Power Electronics
Conference and Exposition (APEC’13), Long Beach, CA, March 17-21, 2013, pp. 1301-1308.
 M.Abolhassani, “Modular multipulse rectifier transformers in symmetrical cascaded H-bridge medium voltage drive,” IEEE Trans. Power Electron., vol. 27, no. 2, pp. 698-705, Feb. 2012.
 K.Sano and M. Takasaki, “A Transformerless D-STATCOM based on a multivoltage cascaded converter requiring no dc source,” IEEE Trans. Power Electron., vol. 27, no. 6, pp. 2783-2795, Jun. 2012.
 C.D.Townsend, T.J. Summers, J. Vodden, A.J. Watson, R.E. Betz, and J.C. Clare, “Optimization of switching losses and capacitor voltage ripple using model predictive control of a cascaded H-bridge multilevel StatCom,” IEEE Trans. Power Electron., vol. 28, no. 7, pp. 3077-3087, Jul. 2013.
 B.Gultekin and M. Ermis, “Cascaded multiulevel converter-based transmission STATCOM: system design methodology and development of a 12 kV ± 12 MVAr power stage,” IEEE Trans. Power Electron., vol. 28, no. 11, pp. 4930-4950, Nov. 2013.
 T.Zhao, G. Wang, S. Battacharya, A. Q. Huang, “Voltage and power balance control for a cascaded H-bridge converter-based solid-state transformer,” IEEE Trans. Power Electron., vol. 28, no. 4, pp. 1523-1532, April. 2013.
 X.She, A. Q. Huang, X. Ni, “Current sensorless power balance strategy for DC/DC converters in a cascaded multilevel converter based solid state transformer,” IEEE Trans. Power Electron., vol. 29, no. 1, pp. 17-22, Jan. 2014.
 S.Du, J. Liu, J, Lin, “Hybrid cascaded H-bridge converter for harmonic current compensation,” IEEE Trans. Power Electron., vol. 28, no. 5, pp. 2170-2179, May. 2013.
 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, Sept. 2009.
 O.Alonso, P. Sanchis, E. Gubia, and L. Marroyo, “Cascaded H-bridge multilevel converter for grid connected photovoltaic generators with independent maximum power point tracking of each solar array,” in Proc. 34th Annu. IEEE PESC, Jun. 2003, vol. 2, pp. 731–735.
 J.Negroni, F. Guinjoan, C. Meza, D. Biel, and P. Sanchis, “Energy sampled data modeling of a cascade H-bridge multilevel converter for grid-connected PV systems,” in Proc. 10th IEEE Int. Power Electron. Congr., Oct. 2006, pp. 1–6.
 Cecati, F. Ciancetta, and P. Siano, “A multilevel inverter for photovoltaic systems with fuzzy logic control,” IEEE Trans. Ind. Electron., Vol. 57, No. 12, pp. 4115-4125, Dec. 2010.
 M.Rezaei, H. Iman-Eini, S. Farhangi, “Grid-connected photovoltaic system based on a cascaded H-Bridge inverter,” Journal of Power Electronics, vol. 12, no. 4, pp. 578-86, July 2002.
 L.Liu, H. Li, Y. Xue, W. Liu, “Reactive power compensation and optimization strategy for grid-interactive cascaded photovoltaic systems,” submitted to IEEE Trans. Power Electron. 2014.
 Y.Shi, L. Liu, H. Li, Y. Xue, “A single-phase grid-connected PV converter with minimal DC-link capacitor and low-frequency ripple-free maximum power point tracking,” in Proc. 5rd IEEE Energy Conversion Congress & Exposition (ECCE’13), Denver, Colorado, Sept. 15-19, 2013, pp. 2385-2390.
 M.J.Ryan, R.W. D. Doncker, and R. D. Lorenz, “Decoupled control of a four-leg inverter via a new 4_4 transformation matrix,” IEEE Trans. Power Electron., vol. 16, no. 5, pp. 694–701, Sep. 2001.
 P.C.Loh, M. J. Newman, D. N. Zmood, and D. G. Holmes, “A comparative analysis of multi-loop voltage regulation strategies for single and three-phase UPS systems,” IEEE Trans. Power Electron., vol. 18, no. 5, pp. 1176–1185, Sep. 2003.
 P.C.Loh and D. G. Holmes, “Analysis of multiloop control strategies for LC/CL/LCL-filtered voltage-source and current-source inverters,” IEEE Trans. Ind. Appl., vol. 41, no. 2, pp. 644–654, Mar./Apr. 2005.