©ISTOCKPHOTO.COM/SORBETTO r Energy Storage By Goran Strbac, Marko Aunedi, Ioannis Konstantelos, Roberto Moreira, Fei Teng, Rodrigo Moreno, Danny Pudjianto, Adriana Laguna, and Panagiotis Papadopoulos september/october 2017 ieee power & energy magazine 33http://www.ISTOCKPHOTO.COM/SORBETTO