TY - SER AU - Marzooghi, H. AU - Raoofat, M. TI - ImprovingPerformance of Proton Exchange Membrane and Solid Oxide Fuel Celis Under Voltage Flicker Using Fuzzy-Pi Controlier KW - Proton Exchange Membrane Fuel Celi (Pemfc) KW - Solid Oxide Fuel Celi(Sofc) KW - Distributed Generation ER -