1. 20 % wind energy by 2030: increasing wind energy’s contribution to US electricity supply. DOE/GO-102008-2567, National Renewable Energy Laboratory, US Department of Energy, Washington, DC, USA (2008)
2. Zervos A, Kjaer C (2008) Pure power: wind energy scenarios up to 2030. European Wind Energy Association, Brussels
3. Kun Yang (2011) Wind monitoring 2011. State Electricity Regulatory Commission (SERC), Beijing
4. Wiser R, Bolinger M (2011) 2010 wind technologies market report. Lawrence Berkeley National Laboratory, Berkeley
5. Accommodating high levels of variable generation. Accommodating high levels of variable generation. North American Electric Reliability Corporation, Princeton (2008)