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Industry: Email Alert RSS FeedControl Harmonic Distortion.
Control Engineering, May, 2007
Eddie Jones, PE; Larry Ray, PE; and Tim Shuter, PE, Schneider Electric
Combining distortion producing devices with a standby generator in a water treatment plant can make for disturbing currents. A temporary fix served on the way to an active harmonic filter.
While variable frequency drives (VFDs) offer many advantages for critical motor speed control and optimizing energy consumption, they are known for producing significant levels of harmonic distortion in adjacent power distribution systems. Utility systems can absorb some of that distortion, but when VFDs are on a circuit driven by a generator, the disturbances can threaten reliable operation.
Water treatment plants often are equipped with VFDs, ozone generators and other loads that...
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