POWER AND CURRENT DECOMPOSITIONS INTO TIME-DOMAIN AND FREQUENCY-DOMAIN COMPONENTS - ANALYSIS AND COMPARISON

Many different theories can be found in the literature coping with the decomposition of powers and currents in electrical systems under non- sinusoidal conditions. The main difference between them lies in the do main where the decomposition is obtained. This paper analyses both a t ime-domain and a frequency-domain decomposition of powers and currents in three-phase systems and shows how the comparison between their res ults gives much more information than the results of a single decompos ition about the load identification and the way the non-active compone nts of power and current can be compensated.