Complete details on the following topic
"EFFECT OF HARMONICS ON POWER SYSTEM"
In this basically introduction of harmonics, definition of harmonics, how harmonics are caused, analysis by Fourier-transforms , its Effects, comparison with 6,12,18 pulse converter , reduction by filters like active , passive, harmonic trap , hybrid filters and low harmonic drive[/b][/u][/i]

reduction of harmonics using filter ppt

Abstract

This paper shows the method of improving the power quality using shunt active power filter. The proposed topic comprises of PI controller, filter hysteresis current control loop, dc page link capacitor. The switching signal generation for filter is from hysteresis current controller techniques. With the all these element shunt active power filter reduce the total harmonic distortion. This paper represents the simulation and analysis of the using three phase three wire system active filter to compensate harmonics .The proposed shunt active filter model uses balanced non-linear load. This paper successfully lowers the THD within IEEE norms and satisfactorily works to compensate current harmonics. The model is made in MATLAB / SIMULINK and successfully reduces the harmonic in the source current.This paper presents the harmonics analysis and compensation which occurred in the electrical system. We use the electrical signal analysis based on FFT technique in order to calculate harmonics that occurred in the electrical system. The harmonics are compensated by using active harmonic filters. This system consists of a computer which works as controller, processor, analysis, monitor and database unit together with a microcontroller which has A/D converter is used for sampling the electrical signals via a parallel port of the computer. The active harmonic filters (IGBT module) are controlled by PWM (pulse width modulation) signal from the microcontroller. The PWM data (switching angle) is programmed by computer. The data such as voltages, currents, the total harmonic distortion etc., can be saved as database for analysis. The harmonics compensation increase high efficiency of the electrical system and decrease the damage and incorrect operation that may happen with electrical devices