4Roberto Gonz a lez, Eugenio Gub i a, Jes u s L o pez. Transformerless single-phase multilevel-based photovoltaie inverter[J]. IEEE Transactions on Industrial Electronics, 2008, 55(7): 2694-2702.
5Lepeze, Teodorescu R, Freijedo F. Leakage current evaluation of a single-phase transformerless PV inverter connected to the grid[C] // IEEE Applied Power Electronics Conference, 2007, Anaheim, United States, 2007: 907- 912.
6Blewitt W M, Atkinson D J, Kelly J, et al. Approach to low-cost prevention of DC grid connected inverters[J]. 3(1): 111-119. injection in transformerless IET Power Electron, 2010,.
7Armstrong M, Atkinson D J, Mark Johnson C. Auto-calibrating DC link current sensing technique for transformerless grid connected H-bridge inverter systems[J]. IEEE Transactions on Power Electronics, 2006, 21(5): 1385-1393.
8Sharma R. Removal of DC offset current fromtransformerless PV inverters connected to utility[C] // Cork Institute of Technology, 40th International Universities Power Engineering Conference, Sept 7-9, 2005, Ireland, 2005:1230-1234.
9Ahfock A, Bowtell L. DC offset elimination in a single phase grid-connected photovoltaic system[C] //Victoria University, 16th Australasian Universities Power Engineering Conference, Dec 10-13, 2006, Melbourne, Australia, 2006.
10Lars Gertmar, Per Karlsson, Olof Semuelsson. On DC injection to AC grids from distributed generation[C] // 2005 European Conference on Power Electronics and Applications, 2005, Dresden, Germany, 2005: 1-10.
