TYPE OF INDUSTRY – Tyre Plant at Dhaka, Bangladesh
YEAR OF IMPLEMENTATION – 2015
After conducting Power Quality Audit in the plant, following observations are made:
Total Harmonic Distortion (THD) current is 41.20 %.
THD voltage is 24.70 %.
Power factor is 0.46
The high Harmonics current generated by DC drive motor 1500 KW at 660 V Bus, result to very high Voltage Harmonics Distortion due to high impedance of Generators. Due to this , the Generators were hunting during operation and not able to operate DC drive motor at full load.
Detune Resonance condition by providing suitable Automatic Passive Harmonic Filter Banks.
Add Digitally controlled Active Harmonic Filter Bank to control THDI & THDV < 5% as per IEEE 519-1992
System Improvement Post Implementation
Measurement at main incomer ACB.
|Sr No.||Parameters||Before Installation of Harmonic Filter banks||After Installation of Harmonic Filter bank|
|1.||Fundamental current I1 Amp||1426 A||1384|
|3.||3rd Harmonic Current I3||158||34A|
|4.||5th Harmonic Current I5||440 A||127A|
|5.||7th Harmonic Current I7||68 A||8 A|
|6.||11th Harmonic Current I11||118 A||76 A|
|7.||13th Harmonic Current I13||70 A||3 A|
|8.||Total Harmonic Distortion Current %||41.20%||10%|
|9.||Total Harmonic Distortion Voltage %||24.70 %||9 %|
|10.||Cos Ø||0.72||0.80 lag|
|11.||True Power Factor PF||0.46||0.79 lag|
|12.||True RMS current Amp||1448 A||1391 A|
|13.||True RMS Voltage V/ Phase||358 V||366 V|
THDI & THDV reduced to < 10% from initial value of 41% & 25% respectively after Installation of Harmonic Filters.
100% loading on Captive Generation is possible after installation of Harmonic Filter Banks.
Huge Saving in Energy Charges due to fully operation of plant on Gas Generation.