Kinetic Energy of Wind-Turbine Generators for System Frequency Support Keung, Ping-Kwan ; Li, Pei ; Banakar, H. ; Ooi, Boon Teck Abstract Publication: IEEE Transactions on Power Systems Pub Date: February 2009 DOI: 10.1109/TPWRS.2008.2004827 Bibcode: 2009ITPSy..24..279K