Implementation of the Wiener Filter for Extracting Power Quality Disturbances

This paper introduces a novel modular strategy for real time extraction of the current and voltage disturbances. The main advantage of this technique is that it does not have mathematical complexity and does not require any model or state-space formulation to extract the disturbances like the other commonly used state-space techniques. In addition, it is very simple for practical and real time implementation if compared to the existing time-domain and frequency-domain methods. The proposed technique is based on the Wiener filter designed adaptively by using a sliding windowing procedure. This Wiener filter is employed to design a generalized extraction strategy for tracking and extracting the most common power quality disturbances. Digital simulation results on the most common power quality problems are demonstrated to validate the proposed strategy.