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This tutorial paper reviews the fundamentals of different methods for current decomposition and non-active power compensation in poly-phase power systems. The basic concepts and the properties of the instantaneous active and reactive power theory and of the active/reactive average power theory are discussed and critically compared.
In this paper, the author discussed the generalization of non-active, reactive and apparent power concepts to nonstandard situations. Although the most general case has not been dealt with for lack of space, the main message should be clear: the generalization of the classical concepts is not straightforward. Measuring these quantities in non-standard (distorted, unbalanced and polyphase) situations...
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