A Novel Single-Phase Transformerless Inverter for Grid-Connected Photovoltaic Systems

• Autorzy: San G. , Qi H. , Guo H.

Warianty tytułu

PL

Nowa trójpoziomowa topologia z sześcioma łącznikami w beztransformatorowych systemach fotowoltaicznych

• Języki publikacji: EN

Abstrakty

EN

Eliminating the leakage current is one of the most important issues for transformerless inverters in grid-connected photovoltaic system applications, where the technical challenge is how to keep the system common-mode voltage constant to reduce the leakage current. A novel singlephase three-level topology for transformerless photovoltaic systems is presented in this paper. Compared with the conventional H-bridge topology, it only needs two additional asymmetrically distributed switches, and the system common-mode voltage can be kept constant with a simple modulation scheme. Test results verify the theoretical analysis and the feasibility of the proposed topology.

PL

W artykule przedstawiono nową trójpoziomową topologię jednofazowego przekształtnika w beztransformatorowym układzie pracującym z panelami fotowoltaicznymi. System pozwala na utrzymanie stałego napięcia common-mode, poprzez wykorzystanie dodatkowych łączników oraz prostego algorytmu modulacji.

Słowa kluczowe

EN

leakage current; transformerless photovoltaic system; common-mode voltage

PL

prąd upływu; beztransformatorowy system fotowoltaiczny; napięcie common mode; napięcie wspólne

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2012
• Tom: R. 88, nr 12a
• Strony: 251--254
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

San G.

autor

Qi H.

autor

Guo H.

• Yanshan University, Qinhuangdao 066004, China,

Bibliografia

• [1] Trends in Photovoltaic Applications: Survey report of selected IEA countries between 1992 and 2010．Report IEA-PVPS T1-19:2011
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• [3] E. Gub´ıa, P. Sanchis, A. Ursua, J. Lopez, and L. Marroyo, “Ground Currents in Single-Phase Transformerless Photovoltaic Systems,” Prog. Photovolt., Res. Appl., vol. 15, no. 7, pp. 629-650, Nov. 2007.
• [4] R. Gonzalez, J. Lopez, P. Sanchis, and L. Marroyo, “Transformerless inverter for single-phase photovoltaic systems,” IEEE Trans. Power Electron., vol. 22, no. 2, pp. 693-697, Mar. 2007.
• [5] R.Gonzalez, E. Gubia, J. Lopez, and L. Marroyo, “Transformerless single phase multilevel-based photovoltaic inverter,” IEEE Trans. Ind. Electron., vol. 55, no. 7, pp. 2694-2702, Jul. 2008.
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• [7] O. Lopez, F. D. Freijedo, A. G. Yepes, P. Fernandez-Comesaa, J. Malvar, R. Teodorescu, and J. Doval-Gandoy, “Eliminating ground current in a transformerless photovoltaic application,” IEEE Trans. Energy Convers., vol. 25, no. 1, pp. 140-147, Mar. 2010.
• [8] H. Xiao and S. Xie, “Leakage current analytical model and application in single-phase transformerless photovoltaic gridconnected inverter,” IEEE Trans. Electromagn. Compat., vol. 52, no. 4, pp. 902-913, Nov. 2010.
• [9] T. Kerekes, R. Teodorescu, P. Rodriguez, G. Vazquez, and E. Aldabas, “A New High-Efficiency Single-Phase Transformerless PV Inverter Topology,” IEEE Trans. Ind. Electron., vol. 58, no. 1, pp. 184-191, Jan. 2011.
• [10] W. Yu, J.-S Lai, H Qian and C. Hutchens “High-Efficiency MOSFET Inverter with H6-Type Configuration for Photovoltaic Nonisolated AC Module Applications,” IEEE Trans. Power Electron., vol.26, no.4, pp.1253-1260, April 2011.