| This paper contains a review of the scientific literature published till date in the field of power theory for systems with periodic non-sinusoidal waveforms. Dynamic increase in the number of installed nonlinear loads, that are the sources of higher harmonics in current and voltage waveforms, results in deterioration of electrical energy parameters. Higher harmonics lead to corrupted current and voltage waveforms, hence a much worsened energy quality. The number of power theories and papers concerning these issues give evidence about the importance of the problems of working condition optimisation in power systems. |
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