European Committee for Electrotechnical Standardization, “EN50160 European Standard on Voltage Characteristics of Electricity Supplied by Public Distribution Systems,” European Committee for Electrotechnical Standardization, Brussels, 2010.
 K. Elamari and L. A. C. Lopes, “Frequency Based Control of Electric Water Heaters in Small PV-Diesel Hybrid Mini-Grids,” 25th Canadian Conference on Electrical and Computer Engineering, Montréal, 29 April-2 May 2012.
 L. A. C. Lopes and M. Dalal-Bachi, “Economic Dispatch and Demand Side Management via Frequency Control in PV-Diesel Hybrid Mini-Grids,” 6th European Conference on PV-Hybrid and Mini-Grids, Chambéry, 24-26 April 2012.
 S. Lukic, S. Wirasingha, F. Rodriguez, J. Cao and A. Emadi, “Power Management of an Ultracapacitor/Battery Hybrid Energy Storage System in an HEV,” IEEE Vehicle Power and Propulsion Conference (VPPC’06), Windsor, 6-8 September 2006.
 N. Hamsic, A. Schmelter, A. Mohd, E. Ortjohann, E. Schultze, A. Tuckey and J. Zimmermann, “Increasing Renewable Energy Penetration in Isolated Grids Using a Flywheel Energy Storage System,” International Conference on Power Engineering, Energy and Electrical Drives, 12-14 April 2007, pp. 195-200.
 P. C. Loh and F. Blaabjerg, “Autonomous Control of Dis tributed Storages in Microgrids,” 2011 IEEE 8th International Conference on Power Electronics and ECCE Asia (ICPE ECCE), Jeju, 30 May 3 June 2011, pp. 536-542.
 W. Li, G. Joós and C. Abbey, “Wind Power Impact on System Frequency Deviation and an ESS Based Power Filtering Algorithm Solution,” 2006 IEEE Power Systems Conference and Exposition (PSCE’06), Atlanta, 29 October-1 November 2006, pp. 2077–2084.
 Y. Z. Sun, Z. S. Zhang, G. J. Li and J. Lin, “Review on Frequency Control of Power Systems with Wind Power Penetration,” 2010 International Conference on Power System Technology (POWERCON), Hangzhou, 24-28 Oc tober 2010.
 Q. C. Zhong and G. Weiss, “Synchronverters: Inverters That Mimic Synchronous Generators,” IEEE Transactions on Industrial Electronics, Vol. 58, No. 4, 2011, pp. 1259-1267. doi:10.1109/TIE.2010.2048839
 “Renewable Energy Cheaper than Coal,” Wind Data Files. http://code.google.com/p/google-rec-csp/downloads/list