Capacitor Adapter Type CBA
Shunt Capacitor Banks into Harmonic Filters Eliminates
Shunt Capacitor Banks amplify harmonics and
generate high switching transients.
order to reduce reactive power consumption , most of the medium-
and high-voltage networks are compensated by shunt capacitor banks.
This solution was very common and effective in the past, when the
electrical loads consisted of linear, inductive or resistive, equipment
only. Nowadays however, the electrical load mainly consists of non-linear
apparatus such as DC - and variable speed drives, computers, CFLs,
etc. Despite the energy saving benefits, the non-linear load have
some special properties which affects the performance of electrical
power systems: they generate harmonics and can easily be disturbed
or damaged due to harmonics and transients. In
such environment, the shunt capacitors can cause a lot of inconvenience
as they use to amplify harmonic currents and generate high switching
transients at energisation. These drawbacks make application of
shunt capacitors not acceptable in most of the electrical systems.
Modern PFC solutions consist of softly switched
Modern solutions of power
factor correction consist of filters generating reactive power and
filtering harmonics switched softly by means of synchronised circuit-breakers
or tyristors. However, a replacement of an existing capacitor bank
with a new filter and a new synchronised circuit-breaker represents
a significant investment which may be difficult to justify for a
cost conscious company.
CBA converts Shunt Capacitors into softly
Capacitor Bank Adapter, CBA, converts existing Shunt Capacitor Banks
into Filters and damps the switching transients.
to transform a shunt capacitor bank into a band-pass filter, high-pass
damped filter, double- or triple tuned filter. At the fundamental
frequency, the capacitor with CBA acts as a shunt capacitor and
generates reactive power. At higher frequencies, the CBA acts as
a harmonic filter reducing the harmonic distortion.
The CBA is not increasing the voltage across the capacitor's terminals
and consequently, the life time of the capacitor remains unaffected.