4Li Quan, Wolfs P. A review of the single phase photovoltaic module integrated converter topologies with three different DC link configurations[J]. IEEE Trans. on Power Electronics, 2008, 23(3): 1320-1333.
5Carrasc J M, Franquelo L G, Bialasiewicz J T, et al. Power-electronic systems for the grid integration of renewable energy sources: A survey[J]. IEEE Trans. on Industrial Electronics, 2006, 53(4): 1002-1016.
6Kjaer S B, Pedersen J K, Blaabjerg F. A review of single-phase grid-connected inverters for photovoltaic modules[J]. IEEE Trans. on Industry Applications, 2005, 41(5): 1292-1306.
7Gonzalez R, Lppez J, Sanchis P, et al. Transformerless inverter for single-phase photovoltaic systems[J]. IEEE Trans. on Power Electronics, 2007, 22(2): 693-697.
8Lopez O, Teodorescu R, Freijedo F. Leakage current evaluation of a single-phase transformerless PV inverter connected to the grid [J]. IEEEApplied Power Electronics Conference, Anaheim, United States, 2007.
9Salas V, Olias E, Alonso M, et al. Overview of the legislation of DC injection in the network for low voltage small grid-connected PV systems in Spain and other countries[J]. Renewable and Sustainable Energy Reviews, 2008, 12(2): 575-583.
10Gubia E, Sanchis P, Ursua A, et al. Ground currents in single-phase transformerless photovoltaic systems[J]. Progress in Photovoltaics: Research andApplications, 2007, 15(7): 629-650.