TYPE OF INDUSTRY – Pharmaceutical Industry, Himachal Pradesh, India
YEAR OF IMPLEMENTATION – 2016
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.
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
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|
|10.||True Power Factor PF||0.95||1|
|11.||True RMS current Amp||1823||1462|
|12.||True RMS Voltage V/ Phase||227.6||230|
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.