5Heier S.Grid integration of wind energy conversion system[M].Chiehester:John Wiley&Sons Ltd,1998.
6Papadopoulos MP,Papathanassiou SA,Tentzerakis ST,et al.Investigation of the flicker emission by grid connected wind turbines[C].The 8th International Conference on Harmonies and Quality of Power ICHQP' 98,Athens,1998.
7W.Z.Gandhare,G.R.Bhagwatikar,Power pollution due to connected wind electric converter,Proceedings of the 2000 IEEE,international conference on control applications,Anchorage,Alaska,USA,September 25-27,2000.