Investigation of harmonics analysis power system due to non-linear loads on the electrical energy quality results

Abstract

With the increase in the demand for electrical energy, more reliable and better quality energy is needed. This concept has taken its place in the field of electrical engineering with the title of ''power quality''. Today, power electronics elements, transformers, arc furnaces, converters, etc. used in industry, harmonic emitting elements have caused deterioration of power quality and as a result, it has led us to ways to get rid of harmonics. In order to provide quality electrical energy, some criteria such as continuity of energy, stability of voltage and frequency, proximity of power factor to 1, balance of phase voltages and harmonic amounts in voltage should be taken into consideration. In this study, the energy quality of different units in Giresun University Güre Campus was investigated with CA 8333 energy analyzer. The results obtained were transferred to the computer environment with the help of graphics. In order to analyze the harmonics and inter harmonics in the power system and to see the effect on the system, series active power filter is modulated and simulated against different nonlinear loads in MATLAB/Simulink program. The results are shown with the FFT (Fast Fourier Transform) analysis program to see the elimination of harmonics in the system and their response to filtering. The results of harmonics in the power system with nonlinear loads before and after filtering are analyzed and examined. As a result of the analysis, suggestions are made regarding the measures that can be taken.

Keywords

• Active filter
• CA 8333
• Energy quality
• Harmonics
• MATLAB/Simulink
• Passive filter