Analysis and Elimination of Harmonics by Using Passive Filters

Abstract

This paper presents harmonic analysis and passive filter design for an industrial installation. A system is designed under MATLAB / Simulink platform that consist of universal bridge with pulse generator to supply a DC load. Harmonic distortion levels of system currents and voltages are obtained by using Fast Fourier Transform (FFT) analysis and also waveform graphs are given to show distortion. Then passive harmonic filters are designed step by step to eliminate harmonics on system. As the designed filters are applied on system, results show that harmonic distortion decreased. FFT analysis is performed for filtered design to obtain effect of designed filters on system. Also current and voltage waveform graphs are given for comparison.

Energy Saving and Solution Proposals Compressors and Electric Motors

“…In the studies which have been made in European Union in recent times, 20-40 % of energy which is spent on compressors which is used for long time in a day is unnecessarily consumed in such these applications and it shows that energy which is unnecessarily spent would be regained [6][7][8][9][10][11].…”

“…Moreover, losts that sudden high currents which are gotten from network at first blush and source from natural structure of methods such as classic star-triangle starting cause them can be showed as sample for it. As choosing compressor ; the following cases should be considered that these are the determination of correct capacity and peak necessity in the consideration of all equipments, the determination of hourly /daily/weekly consumption map and working pressure by the most distant consumption place, the determination correctly of load and usage factors, the determination of compressor type and air quality by need, the determination of machine which has got capacity consumption in the best feature, and that capacity consumption is low as compressor is out-of-gear [5][6][7][8][9][10][11][12].…”

“…The lowest level could be reduced in losts which would occur as pressure is provided to be reduced much more by the usage of regulator at the head of line separably. Today, solution have been tried to be produced as both of theoreticalcalculated-numeric and other practical methods are used in relying on such productivity seekings [7][8][9][10][11][12][13][14][15][16][17][18]. These studies include network-sourced productivity researches, detailed studies such sas working signal and sometimes methods which will work in energy production from renewable energy sources [1,2,6,[11][12][13][14][15][16][17].…”

“…The unbalanced supply voltage causes that positive and negative component currents occur , so it affects substantially on the efficiency of electric motor [10][11][12][13][14]. For example, while the difference between EFF1 motor and EFF3 motor on an asynchronous motor of 75 kW is 1%, an imbalance of 2.5% on the supply voltage can reduces the efficiency of an asynchronous motor at 1.3% or the laxity on belt and bulley mechanism can cause on losts nearly up to 5%.…”

“…Thus, motor condition monitoring and predictive maintenance have become more important than ever. In order to mention on the efficiency improvements in motors in industry , motor parameters are definitely to be followed as online and predictive maintenance is to be done [11][12][13][14].…”