Reviewing Concepts of Instantaneous and Average Compensations in Polyphase Systems

According to the target of minimal line losses and a power factor that is equal to one, this paper studies two concepts of instantaneous compensation of nonactive current which are generally applied to polyphase systems. The analysis is defined both on the bases of the instantaneous-value concept, for arbitrary voltage and current waveforms, and the average-value concept, for steady-state and periodic conditions. The results of using these concepts for instantaneous compensation are compared by simulations.