LPFIEEEAbstract—Thispaperproposesafiltered-sequencephase-lockedloop(FSPLL)structurefordetectionofthepositivesequenceinthree-phasesystems.ThestructureincludestheuseoftheParktransformationandmovingaveragefilters(MAF).PerformanceoftheMAFismathematicallyanalyzedandrepresentedinBodediagrams.T