Detection of Disturbing Loads in Power Systems using Non-Active Power

This paper detects the disturbing loads in distorted and/or unbalanced three phase three wire power system. It is based on the simultaneous measurement of four non-active power quantities, which are found on the IEEE Std.1459-2000 method. It allows, achieving better knowledge of the power system when both harmonic distortion and un-balance are present. The proposed method requires only the fundamental components from the harmonic content of voltage and current. The advantage of this method is, it does not require any spectral analysis of voltage and current. In this paper, usefulness is discussed by means of number of model tests, which were carried out on an effortless test system.