POWERS AND COMPENSATION IN SYSTEMS WITH NONSINUSOIDAL VOLTAGES AND CURRENTS. Part 6. Powers and Reactive Compensation in Three-phase Systems with Neutral Conductor and Sinusoidal Voltages and Currents

Abstract

Most of residential and industrial distribution systems as well as traction and distribution systems in commercial buildings are three-phase systems with a neutral conductor. Due to single-phase loads, such systems can have a substantial load imbalance and consequently, supply currents asymmetry. This asymmetry, along with reactive power, degrades the power factor. There-fore, compensation can be needed more often just in such systems than in other ones. Unfortunately, for decades the power theory was not capable of describing power properties of such systems and in particular, to provide a power equation. This major difficulty was eventually removed in a frame of the Currents’ Physical Components (CPC) power theory.

Keywords

power theory, reactive compensation, supply currents asymmetry

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