Active Harmonic Filters - Advanced Harmonic Analysis Technology | Essential Solution For Power Factor Improvement And Harmonic Filtration

ACTIVE HARMONIC FILTERS

In this age of rapid
Industrial Growth, many industries (like foundry) are facing severe
problem of Harmonic Power Pollution. This problem further propagates
to SEB grids and consumers in the vicinity.

The Electricity Act 2003
says that every industrial customer having a contract demand of over
500 KVA will be required to conduct Harmonic Analysis. As well as
declare the level of harmonics present in the plant and propose a
time bound for its elimination.

Regulatory authorities are
also planning to introduce KVAH based billing system instead of the
present KWhr based system. This step will compel industry to maintain
their power factor constantly at unity.

HARMONICS
They
are sinusoidal waveforms. They have frequency in multiples of
fundamental frequency. They areproduced by equipment using frequency
conversion technology. They are also generated due to power drawing
pattern of non-linear loads.

DISADVANTAGES OF HARMONICS
1)
Distortion in supply voltage waveform.
2) Increase in ground to
neutral voltage harmful to electronic equipment.
3) Over heating
of electrical equipment, loss of efficiency and reduced life.
4)
Incorrect readings of power parameters.
5) Large currents in
neutral wire heating and fire.
6) Poor power factor KVAH reading
increases.
7) Amplification of harmonic currents Plain capacitors
installed in harmonic atmosphere can give rise to dangerously hih
currents damaging capacitors and other electrical equipments.
8)
Operational problems of protective systems and equipments.


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.