Project Description

Paper Industry

TYPE OF INDUSTRY – Paper Industry Tamilnadu, India

YEAR OF IMPLEMENTATION – 2016

PROBLEMS

  • Total Harmonic Distortion more than TNERC requirement.

OBSERVATIONS

After conducting Power quality Audit in the plant following observations are made.

  • Total Harmonic Distortion (THD) current is 17.50 %.

  • THD voltage is 5.30 % .

  • Power factor is 0.976

  • The 3rd ,5th , 7th and 11th Harmonics  are predominant.

SOLUTION

Digitally controlled Active Harmonic Filter Bank to control THDI & THDV.

Project Implementation

Design, Manufacturing & Installation of Digitally controlled Active Harmonic filter banks of 150 A , 440 V , 3ph,4 wire at main incomer.

System Improvement Post Implementation

Measurement at main incomer 33 KV at PCC
Sr No. Parameters Before Installation of Harmonic Filter banks After Installation of Harmonic Filter bank
1. Fundamental current I1 Amp 13.05 A 13.0 A
2. 2nd Harmonic Current I2 — —
3. 3rd Harmonic Current I3 0.17 A 0.23 A
4. 5th Harmonic Current I5 1.83 A 0.09 A
5. 7th Harmonic Current I7 1.0 A 0.12 A
6. 11th Harmonic Current I11 0.63 A 0.14 A
7. 13th Harmonic Current I13 — 24 A
8. Total Harmonic Distortion Current % 17.50 % 2.5 %
9. Total Harmonic Distortion Voltage % 5.30 % 2.1 %
10. Cos Ø 0.986 0.999  lag
11. True Power Factor PF 0.976 0.996 lag
12. True RMS current Amp 14.4 A 13.20  A
13. True RMS Voltage V/ Phase 20.30 kv 20.31 V

RESULT

  • THDI & THDV reduced to < 2.5 % & 2.1 % from initial value of 17.50 %  & 5.3 % respectively after Installation of Harmonic Filters.
  • Power Factor Improved to 0.996 .
  • Plant Comply with Tamil Nadu Electricity and Regulatory Commission (TNERC) requirement of Harmonic Distortion and Saved 15 % monthly penalty.