Problem

The renovation of two reverse osmosis stations at a wastewater treatment plant in Alabama required harmonic mitigation. Each station’s total non-linear load, and resulting harmonic distortion, required 670 corrective amps. Without a solution the distortion would potentially cause the equipment to go off-line due to nuisance tripping. The owner considered the addition of multiple 300 amp active filters in parallel, equating to three units per station. Due to space and cost constraints, the customer struggles with this solution.

Solution

TCI offers the largest single-unit amp rated active filters in the market, an ideal solution for this application. The owner installed one 700 amp TCI active harmonic filter per station. The benefits included significant cost savings over alternative solutions and the smaller footprint allowed the installation to proceed without other costly modifications. The stations now meet the IEEE-519 requirements eliminating the nuisance tripping caused by harmonics.