HARMONIC FILTERATION

HARMONIC FILTERATION The increasing developments need increasing use of electricity While meeting this power demand, there causes a pollution in electrical system called Harmonics. Harmonic Analysis:- process of determining the magnitude, order and phase of the several harmonics present in a complex periodic wave. What Hazards created by Harmonics:- ----------------------------------- 1) Amplification of harmonic levels resulting from series and parallel resonance, reduction of efficiency of power generation, transmission and utilization. 2) Plant Mal-functioning. 3) Malfunctioning & Amp; failure of electronic equipments. 4) Over heating & failure of electrical motors. 5) Overloading,Overheating & failure of P.f correction capacitors. Resonance due to interaction of capacitor with harmonics. 6) Overloading & Overheating of distribution Transformers and neutral conductors. 7) Excessive measurement errors. 8) Spurious operation of Fuses, circuit Breakers & other protective Equipments. 9) Voltage glitches in computer systems resulting in losting data. Excessive flickers on VDU''''S. 10) Electromagnetic interface with TV,radio, communication & Telephone systems. 11) Damage & disruption to stand by generators & associated AVR control Equipment. 12) Interface with ripple control systems. For carrying out this analysis, the following methods are available which are all based on Fourier theorem:- 1) Analytical method - standard Fourier Analysis. 2) Graphical method - a) superposition method b) Twenty four ordinate method. To eliminate Harmonics the AIM EUROPE FILTER incorporates all of the following:- 1) Harmonic Mitigation 2) Reactive current control 3) load side transient suppression 4) Load side surge suppression. 5) Reduces the effect of supply sags & surges (flickers). How the AIM filter works:- ------------------------- 1) The AIM filter continously monitors the harmonic currents demanded by the load and generates an adaptive wave form which matches exactly the shape of the non linear portion of the load current. 2) AIM injects this adaptive current into the load point of connection only fundamental current is drawn from the source of the load. 3) Compensates from the 2nd to the 51st harmonic in a response t