Adaptive Notch Filter Bank Based Power Quality Analysis of an Ultra-High Frequency Induction Heating System

Year 2019, Volume: 7 Issue: 2, 131 - 136, 30.04.2019

Mehmet Taştan

https://doi.org/10.17694/bajece.498021

Cited By: 1

Abstract

Widespread use of the
semiconductor switching elements of power electronics in energy systems has
brought about various power quality problems. One of these significant power
quality problems is the harmonics, which occur in power systems. Harmonics are
generated predominantly by induction systems, arc furnaces, welding machines,
static frequency converters and motor converter drivers. In this study, a power
quality analysis is proposed with a Phase-Locked Loop (PLL) based Digital
Adaptive Notch Filter (ANF) for the 900 KHz Ultra-High Frequency Induction
Heating System (UHFIHS), which is widely used in the industry. In this proposed
method, firstly the power signal is synchronized with the fundamental frequency
using PLL, and then the harmonic frequency components of the signal is obtained
by the ANF. Finally, challenging factors behind the harmonic analysis, such as
fundamental frequency shifting, spectral leakage and leakage effect are
eliminated and thus a precise and reliable power quality analysis is conducted.

Keywords

power quality, power system harmonics, phase locked loops, adaptive filter, electromagnetic induction

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