TYPE OF INDUSTRY – Chlorate Plant (Chemical Plant) at Dhaka, Bangladesh
YEAR OF IMPLEMENTATION – 2014
After conducting Power Quality Audit in the plant, following observations are made:
Total Harmonic Distortion (THD) current is 15.90%
THD Voltage is 11.80%
Power Factor is 0.77
The 2nd (Even) Harmonics current is very high, which result to high voltage Harmonic Distortion on Generator. Due to this the Generators are hunting during operation and not able to operate plant at full load.
Digitally controlled Active Harmonic Filter Bank to control THDI & THDV and specially tuned for 2nd even Harmonics.
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||1301 A||1300|
|2.||2nd Harmonic Current I2||88 A||30 A|
|3.||3rd Harmonic Current I3||6.5 A||5.3A|
|4.||5th Harmonic Current I5||150 A||13.2 A|
|5.||7th Harmonic Current I7||102 A||22.5 A|
|6.||11th Harmonic Current I11||42 A||36 A|
|7.||13th Harmonic Current I13||33 A||24 A|
|8.||Total Harmonic Distortion Current %||15.90 %||6.40 %|
|9.||Total Harmonic Distortion Voltage %||11.80 %||7.10 %|
|10.||Cos Ø||0.78||0.778 lag|
|11.||True Power Factor PF||0.77||0.77 lag|
|12.||True RMS current Amp||1307 A||1304 A|
|13.||True RMS Voltage V/ Phase||234.3V||235 V|
THDI & THDV reduced to < 7 % from initial value of 16% & 12 % respectively after Installation of Harmonic Filters.
Plant can operate at Full load on Captive Generation after installation of Harmonic Filter Banks.
Reduction in Electrical Breakdown.
Huge Saving in Energy Charges due to fully operation of plant on Gas Generation.