Power system harmonic analysis programs for power quality teaching and studying

Abstract

To present a graphic user interface (GUI)-based power system harmonic analysis program developed under MATLAB environment. The program can be divided into three parts. The first part performs harmonic waveform synthesis. A user can input various harmonic magnitudes and phase angles and then view the resultant distorted waveform. The second part analyzes the power system harmonic response with combination of linear and nonlinear loads, capacitor banks, a detuned filter and tuned filters. The major features of this part are impedance scan, harmonic current flow and harmonic voltage distortion calculation. The harmonic impedance scan can reveal resonance conditions of a power system. The last part deals with harmonic filter design and simulation. Simulations of system response after installation of harmonic filters are crucial in order to verify the effectiveness of the harmonic filter design. The developed program can be used for power quality teaching and studying. Various cases can be simulated for better understanding of harmonic characteristics. The developed program is user-friendly for non-experienced and experienced users in order to understand harmonic analysis.