J. H. Eto, J. Undrill, P. Mackin, R. Daschmans, B. Williams, B. Haney, R. Hunt, J.
Ellis, H. Illian, C. Martinez, M. O’Malley, K. Coughlin, K. H. LaCommare, Dec. 2010,
Use of frequency response metrics to assess the planning and operating requirements
for reliable integration of variable renewable generation, Lawrence Berkeley National
Laboratory, Berkeley, Vol. ca, No. usa, Tech. Rep. LBNL-4142E