Energy flow related phenomena in three-phase unbalanced, linear, time-invariant (LTI) loads, supplied with asymmetrical, but sinusoidal voltage, in three-wire systems, are investigated in the paper. It is demonstrated that the load current can be decomposed into Currents' Physical Components (CPC), associated with distinctive physical phenomena in the load. It is also shown how the CPC can be expressed in terms of the supply voltage and equivalent parameters of the load. An equivalent circuit of LTI loads at asymmetrical, but sinusoidal supply voltage is presented as well. This decomposition provides solid fundamentals for defining powers of such loads.
Power properties of unbalanced linear time-invariant (LTI) loads in three-phase three-wire circuits at asymmetrical and nonsinusoidal supply voltages are investigated in this paper. It is demonstrated that the supply current of such loads can be decomposed into Currents' Physical Components (CPC), associated with distinctive physical phenomena in the load. The power equation is developed and it is also demonstrated how the current components can be expressed in terms of the supply voltage and the equivalent parameters of the load. Streszczenie. W artykule analizowane są właściwości energetyczne niezrównoważonych, czasowo-niezmienniczych (LTI) odbiorników trójfazowych, zasilanych napięciem niesymetrycznym i niesinusoidalnym w systemach trójprzewodowych. Pokazano, że prądy zasilania w takich warunkach mogą być rozłożone na składowe stowarzyszone z konkretnymi zjawiskami fizycznymi w odbiorniku, to jest na Składowe Fizyczne. Pokazano jak Składowe Fizyczne Prądów mogą być obliczane na podstawie znajomości napięć zasilania i równoważnych parametrów odbiornika. (Składowe Fizyczne Prądów (CPC) zasilania liniowych, czasowo niezmienniczych (LTI) odbiorników trójfazowych zasilanych napięciem niesymetrycznym i niesinusoidalnym).
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