Comparison of Inverter Topologies by Total Har-Monic Distortion of Output Voltage

Abstract

This paper is devoted to comparison analysis of different topologies of the inverters that are used in the systems with alternative energy sources. A brief theoretical review of the most commonly used topologies for the power systems with alternative energy sources are given, their main advantages and disadvantages are determined. In close details were considered principles of construction and operation of the topology with impedance input circuit (z-inverter), and topology with quasi-impedance input circuit (quasi-z-inverter). A special feature of these topologies is ability to operate in special mode which is called “shoot-trough state”. It means that one of the inverter’s arms is short-circuited for a small period of time which substitutes a part of the zero state. Possibility to operate in such state allows to increase the input voltage of the inverter that can be very suitable in inverters that are included in photovoltaic power systems. Implementation of shoot-trough state allows tracking maximum power point of the photovoltaic array without implementation of additional converters for this. Implementation of quasi-z-topology allows to reduce the load on the passive components of the impedance circuit and to ensure continuous power take-off from the solar batteries array, which makes it easier to track the maximum power point. As an evolution of the cascade multilevel and z- / quasi-z-inverter topologies multilevel cascaded topologies with z- and quasi-z-inverters in separate blocks were considered. The main principles of this structure allows to unite all advantages of cascaded multilevel and z-/quasi-z topologies in one device but also bring few drawbacks such as complexity of the implementation and higher cost of the resulting device. These topologies were simulated in Matlab Simulink, output voltage spectra and total harmonic distortion was obtained and analyzed. According to the obtained results of the simulation and review recommendations for proper selection of the topology of inverter depending on the type and sensitivity to the quality of the input voltage of the load and type of chosen alternative energy source are given. According to this results convenient cascaded multilevel topology could be recommended for the loads that are especially vulnerable to low quality of input supply voltage such as analog amplifiers and radio receivers as topology that have lowest THD (Total harmonic distortion) ratio. Z-/quasi-z-topologies are appropriate to consider as a converter of photovoltaic power system that will work on loads that are not demanding to the quality of supply voltage as topologies with highest level of THD of the output voltage. Cascaded topologies with z- and quasi-z-inverters in separate blocks could be considered as a compromise that could be used in photovoltaic power systems that works on vulnerable loads but such solution increases the cost of a whole power system and complication of the control system.

Keywords

References

1. M. N. Makarov, R. G. Haybrakhmanov, “Mnogourovnevie invertory napryazhenia. Obzor topologiy i preminenie [Multilevel voltage inverters. Topology overview and application],” Vestnik tehnologicheskogo universiteta, vol. 19, no. 22, pp. 134-138, 2016, URL: https://elibrary.ru/item.asp?id=27441520
2. J. Lai, F. Peng, “Multilevel converters - a new breed of power converters,” IEEE Trans. Ind. Appl., vol. 32, no. 3, pp. 509-517, May/Jun.1996, DOI: 10.1109/28.502161
3. M. Glinka and R. Marquardt, “A new ac/ac multilevel converter family,” IEEE Trans. Ind. Electron., vol. 52, no. 3, pp. 662-669, Jun. 2005, DOI: 10.1109/TIE.2005.843973
4. J. Rodriguez, S. Bernet, B. Wu, J. O. Ponu, S. Kouro, “Multilevel voltage-source-converter topologies for industrial medium-voltage drives,” IEEE Trans. Ind. Electron., vol. 54, no. 6, pp. 2930–2945, Dec. 2007, DOI: 10.1109/TIE.2007.907044
5. S. Kouro, M. Malinowski, K. Gopakumar, J. Pou,, L.G. Franquelo, B. Wu, J. Rodriguez, M.A. Perez, 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: 10.1109/TIE.2010.2049719
6. P. V. Krishna, A. K. Singh and R. Gupta, "Grid connected solar PV fed cascaded multilevel inverter implementation using XSG platform," IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, Yokohama, pp. 004678-004683, 2015, DOI: 10.1109/IECON.2015.7392830
7. P. Samuel, N. Chandrashekhar and R. Gupta, "Wind energy conversion based on seven-level cascaded H-bridge inverter using LabVIEW FPGA," 2010 International Conference on Power, Control and Embedded Systems, Allahabad, pp. 1-6, 2010. DOI: 10.1109/ICPCES.2010.5698653
8. F. Peng, “Z-source inverter,” IEEE Trans. Ind. Appl.,vol. 39, no. 2, pp. 504-510, March/April 2003, DOI: 10.1109/TIA.2003.808920
9. M. Hanif, P.Basu, K.Gaughan, “Understanding the operation of a Z-source inverter for photovoltaic operation with a design example,” IET Power Electron., vol.4, no.3, pp. 278-287, Feb. 2010, DOI: 10.1049/iet-pel.2009.0176
10. K. Rajambal, P. Sanjeevikuar, A. Chinnaponnu, “Comparison of MLI and Z-source inverter for transformerless operation of Single-Phase photovoltaic systems,” Thahammasat Int. J. Sc., Tech., vol. 15, no. 1, January/March 2010, URL: https://www.researchgate.net/publication/231522437_Comparison_of_MLI_and_Z-Source_Inverter_for_Transformerless_Operation_of_Single-Phase_Photovoltaic_Systems
11. A. Abdelhakim, P. Davari, F. Blaabjerg and P. Mattavelli, "Analysis and Design of the Quasi-Z-Source Inverter for Wide Range of Operation," 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL), Padua, 2018, pp. 1-6. DOI: 10.1109/COMPEL.2018.8458486

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Copyright (c) 2019 Ігор Сергійович Федин (Автор)