Presented By Deepak Kumar Bari Regd. No

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Presentation transcript:

Presented By Deepak Kumar Bari Regd. No-0811014003 POWER FILTER Presented By Deepak Kumar Bari Regd. No-0811014003

Introduction to Active Filter Sinusoidal Wave Form Distortion Current

General principle of active filtering Harmonic current spectrum Distorting harmonic Current

Waveforms obtained by eliminating the harmonic components of a rectangular periodic signal up to the (a) 13th harmonic, (b) the 25th harmonic and (c) the 50th harmonic

ACTIVE FILTER USED AS REACTIVE POWER Capacitor Bank Automatic Compensation Fixed Compensation

PRACTICAL APPLICATIONS Electrolysis equipment 3 MVA Transformer Load- 6 pulse controlled rectifier 7% de-tuned capacitor Bank Active filter in an electrolysis plant

Electrolysis plant: initial and filtered line current

Induction heating 6 Pulse Drives 945 KVA Filtrate Up to 50th Harmonic Induction heating case: single line diagram of the installation

Induction heating: initial and filtered line current

Cable car 50 Hz, 400V, 225 A Load- Two 230 KW 6 pulse drives Line carrier freq. communication Active filter for a cable car

Cable car: initial and filtered line current

Welders 3rd Harmonic generated