روشهاي جديد محاسبه مولفه هاي توان در شرايط غيرسينوسي و نامتعادل و ارزيابي آنها براي يك كوره قوس الكتريكي

New Definitions for the Power Terms in Distorted and Unbalanced Conditions and Calculation of these Terms for an Electric Arc Furnace

The rapid increase of non-linear loads in the last three decades has caused electrical quantities such as voltages and currents in 3 -phase distribution systems to become distorted waveforms. This paper reviews, explains and discusses some new concepts, definitions and new available theory in the unbalanced and distorted systems. The usefulness of the proposed practical definitions is investigated by means of applying them to the real-world measurements of a three-phase electric are furnace voltages and currents. Finally, the main power terms such as fundamental and non fundamental power components, harmonic pollution, phase unbalance, active, reactive; nonactive and distortion components are evaluated for a 3-phase arc furnace.