6Femia N, Petrone G, Spagnuolo G, et al. Optimization of perturb and observe maximum power point tracking method[J]. IEEE Trans on Power Electronics,2005,20(4) :963-973.
7Hussein K H,Muta I, Hoshino T, et al. Maximum photovoltaic power tracking : an algorithm for rapidly changing atmospheric conditions [J]. IEE Proceedings-Generation, Transmission and Distribution, 1995,142(1) :59-64.
8Esram T, Chapman P L. Comparison of photovoltaic array maximum power point tracking techniques[J]. IEEE Trans on Energy Conversion, 2007,22 (2):439 -449.
9Liu Fangrui,Duan Shanxu, Liu Fei, et al . A variable step size INC MPPT method for PV systems [J]. IEEE Trans on Industrial Electronics, 2008,55 (7): 2622-2628.
10Xiao Weidong,Dunford William G, Palmer Patrick R, et al. Application of centered differentiation and steepest descent to maximum power point tracking [J]. IEEE Trans on Industrial Electronics, 2007,54 (5) :2539-2549.
