Process and device for determining the positive and negative phase sequence components of current in an unbalanced 3-phase system

摘要

method and durchfu00fchrungsanordnung for the determination of - and gegenkomponentenstromes a dissymetrical loaded network.according to the invention, the mitkomponentenstrom and / or gegenkomponentenstrom due to the formelbzw.a corresponding structured berechnungsschaltung wonin the phasenstru00f6me after elimination of a possibly existing nullkomponentenstroms and an indication of the phasenfolge input.the parameters in this formula are algebraic combinations of the measured phasenstru00f6me. the invention is for the determination of the in - orgegenkomponentenstromes no blindwiderstu00e4nde containing filter needed, so that the measurement with frequency changes and vibrations in the network is insensitive.