There are number of types of equipment that will reduce
harmonic distortion (tuned harmonic filters, line reactors, active harmonic
filters, multi-pulse rectifiers, 5% THD harmonic filters, phase shifting
transformers, etc). Each has its merits
in the proper circumstances. Each has its advantages as well as
disadvantages. Each has a typical
performance and cost. There is no single
method that is best for all cases.
This
best solution will depend on the unique aspects of the power system, facility
operations, type of loads and the target distortion levels. In a facility with many loads, often the best
technical and economical solution involves a combination of methods. An
examination of the single line diagram supplemented by simulation of the power
electronic loads can result in a determination of the best economical and
technical solution to a harmonics concern.
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