Resumen de Electrical power components decomposition of periodic polyharmonic current
Oleksii V. Bialobrzheskyi, Dmytro RodKin, Andrii Gladyr
Purpose – At the current stage of electrical technology development, it is relevant to take into account the quality of electrical energy. It can be implemented if an assessed energy quality indicator is available. The amount of electrical energy is determined by active power, which is transmitted over a certain time period. In some cases, reactive power is included in the metering system. The distortion power is justifiably criticized and is not taken into account. The purpose of this paper consists in the substantiation of the indicator of the distortion of the periodic polyharmonic current electrical energy power, by separating from the instantaneous power such harmonics, which formed by same frequencies current and voltage harmonics.
Design/methodology/approach – Using the method of calculating linear polyharmonic current circuits, the following quantities are identified in instantaneous power: active, reactive and apparent powers of each harmonic. These components are known from references as canonical.
Findings – By the method of instantaneous power harmonic analysis, the components formed by current and voltage harmonics of the same frequency and different frequencies are distinguished.
Research limitations/implications – The RMS value of the instantaneous power due to current and voltage harmonics of different frequencies is justified in the work. This quantity allows you to distinguish the instantaneous power distortion level in comparison with the existing quantity.
Practical implications – The results can be used to assess the level of instantaneous power distortion level in commercial and technical metering systems.
Originality/value – The definition of instantaneous power distortion by extracting the canonical components from it and determining the root mean square value of the remainder is proposed.
