1. Variability of Wind Power and Other Renewables, Management Options and Strategies;International Energy Agency,2005
2. Wind Power Integration: Connection and System Operational Aspects;Fox,2007
3. Recent development of countermeasures against impacts of wind power on electricity grid;Nanahara;IEEJ Trans. Power Energy,2009
4. Short-term Power Fluctuation of Wind Turbines: Analyzing Data from the German 250-MW Measurement Program from the Ancillary Services Viewpoint;Ernst,1999
5. Impact of hourly wind power variations on the system operation in the nordic countries;Holttinen;Wind Energy,2005