| Abstract |
Conventional calculation methods of electric power and its components as orthogonal, integral, symbolic, systems equivalence, etc., applied to nonsinusoidal system analysis bring to different and sometimes to inexplicable results. Obtained in such a way reactive and apparent power have no physical interpretation and have only an arbitrary mathematical implication. Therefore, currently accepted definitions of electric power components are reviewed and their limitations in systems with converters are analyzed. In terms of instantaneous power a number of energy flow and power components such as active, external, input, reverse, resonant, storage, oscillation, etc... have been determined. These components can be used to determine new energetic factors: the system energy utilization factor, consumer energy utilization factor, power oscillation factor, etc... They may be applied for the power system optimization, reactive and active compensation, harmonic suppression. The application of the theory developed is illustrated by a typical example. The proposed power and energy components can be directly measured by means of digital electronic instruments. |
