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

2. Introduction to Active Filter
Sinusoidal Wave Form
Distortion Current

3. General principle of active filtering
Harmonic current spectrum
Distorting harmonic Current

4. 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

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

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

7. Electrolysis plant: initial and filtered line current

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

9. Induction heating: initial and filtered line current

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

11. Cable car: initial and filtered line current

12. Welders
3rd Harmonic generated