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Studies on the power theory and studies on the supply quality and the loading quality refer to the same object, namely, to systems with nonsinusoidal and asymmetrical voltages and current, but from a different perspective and with different objectives. One would expect that the power theory, focused on power properties of electrical systems, will provide theoretical fundamentals for studies on the supply quality and the loading quality. It has occurred, that these studies were not supported substantially by the power theory, however. A major lag in the development of the power theory over the whole XX century was the main cause of it. Even worse than that, a number of misconceptions regarding power properties of electrical systems were disseminated in the electrical engineering community. An overview of such misconceptions that could have a detrimental effect on studies on the supply quality and loading quality in electrical systems is presented in this paper. A draft of the Currents&#x0027; Physical Components (CPC) - based power theory of electrical systems, which provides interpretation of powers related physical phenomena, is presented as well.

Why the power theory has a limited contribution to studies on the supply and loading quality?