Project Description

Pharmaceutical Industry

TYPE OF INDUSTRY – Pharmaceutical Industry, Himachal Pradesh, India

YEAR OF IMPLEMENTATION – 2016

PROBLEMS

  • High Harmonic Distortion
  • Low power factor
  • High KVAH consumption
  • Frequent breakdown in VFDs

OBSERVATIONS

After conducting Power Quality Audit in the plant, following observations are made:

  • 5th & 7th Harmonics are getting amplify due to resonance effects between conventional type APFC (w/o Harmonic Filters) & Transformer impedance.

  • The Amplification of Harmonics cause frequent failure in VFDs drives.

SOLUTION

  • Detune Resonance condition by providing suitable Passive Harmonic Filter Banks.

  • Add Digitally controlled Active Harmonic Filter Bank to control THDI & THDV < 5% as per IEEE 519-1992

Project Implementation

Design, Manufacturing & Installation of Hybrid Harmonic Filter Banks -Automatic Passive Harmonic filter bank 1500 kvar and Digitally controlled Active Harmonic filter banks of 150A, 3ph,4 wire at main incomer.

System Improvement Post Implementation

Measurement at main incomer — Supply
Sr No. Parameters Before Installation of Harmonic Filter banks After Installation of Harmonic Filter bank
1. Fundamental current I1 Amp 1736 A 1462 A
2. 3nd Harmonic Current I2 50.1 A 53 A
3. 5rd Harmonic Current I3 135.4 A 57A
4. 7th Harmonic Current I5 58.3 A 34 A
5. 11th Harmonic Current I7 18.8 A 15 A
6. 13th Harmonic Current I11 12.1 A 9 A
7. Total Harmonic Distortion Current % 9.48 5.8
8. Total Harmonic Distortion Voltage % 2.8 2.3
9. Cos Ø 0.94 1
10. True Power Factor PF 0.95 1
11. True RMS current Amp 1823 1462
12. True RMS Voltage V/ Phase 227.6 230
13. Total KW 1135 1105
14. Total KVA 1172 1107

RESULT

  • THDI & THDV reduced to < 5%.
  • The 5th & 7th Harmonics current are reduced.
  • PF improvement to unity (1.0) from 0.94 lag
  • Apprx 6 % saving in KVA.
  • Reduction in Electrical Breakdown in the Plant.