Harmonic Filters - Advanced Power Factor Improvement Solution | Elimination Of Harmonic Distortion, Enhanced System Reliability, Optimized Electrical Equipment Lifespan

Harmonic FiltersHarmonics are
sinusoidal wave forms. They have frequency in multiples of
fundamental frequency. They are produced by equipment using frequency
conversion technology. They are also generated due to power drawing
pattern of non- linker loads.Sources of Harmonic Filters
Automatic welding
machines.
Uninterrupted power
supplies.
Switch mode power supply.
Power Transformers.
Variable speed drives.
Medium frequency induction
furnaces.
Invertors.
Rectifiers.
D.C machines.
ARC furnaces.










Therefore it is essential
to record power parameters and conduct harmonic study in order to
provide correct solution for the P.F. improvement and harmonic
filtration.
Solutions :Depending
on level of harmonics, possible solutions are designed.Harmonics
protection filters : They are used for improvement of power factor
and part elimination of harmonics. They are nothing but a combination
of reactors and capacitors, suitably detuned. They are useful when
distortion is 15 to 40 %.

Advantages of Harmonic
Filters :a) Protect capacitors from Harmonic overloading.b)
Eliminate 20 to 50 % predominate Harmonics.c) Avoid harmonic
amplification in the system.d) Improve power factor.This system can be
configured to operate in fully automatic mode. The object is to
eliminate high level of harmonic currents to acceptable level to
comply with utility regulations. They provide traps for individual
harmonic frequencies, and provide reactive power compensation at
fundamental frequency.
Thus following are the
direct benefits

Elimination of power
factor penalty.
Reduction in Harmonic
Distortion.
Reduction in line losses.
Improvement in voltage
profile.
Release of Additional VA
capacity in the system.
Improvement in overall
power quality.
Improvement in Reduction
in Energy bill.
Improvement in system
reliability.
Improvement in life of
Electrical Equipment