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This paper presents a method to measure the frequency dependent impedance of an electric machine to calculate the additional losses caused by inverter output voltage harmonics. These losses are calculated by combining the calculated inverter output voltage spectrum and the measured frequency dependent impedance of the machine.
This paper presents a method for assessing causality in power quality under stationary conditions, resorting to an index tipically employed in graph theory, the centrality index. Subsequently, the method is illustrated by means of two real systems, allowing a comparison among the results obtained from other existing methods. A discussion regarding the results and its interpretation is presented as...
The determination of power quality disturbances has been studied in the last twenty years from different perspectives. Current decomposition provides a suitable approach to determine how disturbances propagate among circuits. The application of Fryze-Buchholz-Depenbrock - FBD power theory revealed useful results, such application has been called Method of Disturbances Interaction. In this paper a...
The research on the definition and measurement approaches of reactive power considering the influence of harmonics has become popular. In this paper, according to reactive power defined by Budeanu, a novel method based on ANF (adaptive notch filter) for the digital measurement of the single-phase reactive power in the presence of harmonics is presented. Compared with the well-established techniques...
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