TYPE OF INDUSTRY – Paper Industry Tamilnadu, India
YEAR OF IMPLEMENTATION – 2016
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.
Digitally controlled Active Harmonic Filter Bank to control THDI & THDV.
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|
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.