A generator-powered natural gas sweetening plant faced severe harmonic distortion due to multiple adjustable frequency drives in eight MCCs controlling amine process cooling fans. Traditional mitigation methods—line reactors, multi-pulse drives, tuned filters, or active filters—were impractical or costly. A passive harmonic filter was installed at each MCC, delivering voltage distortion of 1.9% and current distortion of 5.7%, well below IEEE 519 limits. The solution was system-independent, cost-effective, space-efficient, and improved power reliability for this critical H₂S removal process.

Join for free to read