TY - JOUR T1 - Grid Impedance Monitoring System for DistributedPower Generation Electronic Interfaces JF - IEEE Transactions on Instrumentation and Measurement Y1 - 2009 A1 - Santiago Cobreces A1 - Emilio Bueno A1 - Daniel Pizarro A1 - F. J. Rodriguez PB - IEEE CY - EEUU VL - 58 IS - 9 ER -