Power Calculations Based on New Definitions for Measured Data of Arc Furnace and Transformer Inrush Current

摘要

This paper examines new definitions for power calculation in non-sinusoidal and unbalanced systems, I.e., when voltage and/or currents are distorted and/or unbalanced and also definitions for measurable values that may be used to indicate the level of distortion and unbalance. The usefulness of these proposed definitions is investigated by means of applying them to data obtained from measurements of a three-phase electric arc furnace and transformer inrush current.