It defines as the
fitness of electrical power source wave form characteristics to consumer
devices and equipment's requirements. Power quality is used to describe
electrical power source that drive an electrical load making it functions in a
proper way and to avoid malfunction or operation stoppage.
In the modern industrial
and commercial applications, we use electrical and electronic devices in
automatic processes, like programmable logic control devices (PLC), adjustable
speed drive devices (ASD) and much other electronics for the purpose of:
1- Increase the
productivity.
2- Increase Product
quality and reduce the cost of the process.
But on
the other hand, these types of equipment increase the
problems with electrical compatibility because they aren't tolerant with the
electrical environment, they consider as
non linear loads where their impendences vary with the variation of the feeding
source voltage variation.
From
this point of view power quality issue arises and become very important as currently
the power system world is experiencing a major revolution due to liberalization
of the electricity markets, Producers or retailers need to keep up quality
levels at an optimal cost and customers request an acceptable power quality
level to their activity at an attractive price
There are
many types of power quality problems and each of them has varying and diverse
causes and impacts …. Like:-
" Under voltage -
Voltage Sag (dip) - Over Voltage - Voltage Swell - Voltage Transient - Voltage
Notching - Voltage Noise - Voltage Interruption (Black Out) - Frequency
Variations - Low Power Factor - Harmonics ".
We will handle in detail
each power quality problem referred above in the coming writing, please follow
us .
Post a Comment