20-07-2012, 11:18 AM
VOLTAGE FLICKERING
VOLTAGE FLICKERING.pptx (Size: 808.08 KB / Downloads: 45)
FLICKER:-
Flicker is understood to be the sensation that is
experienced by humans when subjected to changes in the
illumination intensity.
The human maximum sensitivity to
illumination changes is in the frequency range from about
5 to 15 Hz.
The fluctuating illumination is caused by
amplitude modulation of the feeding alternating voltage.
Large industrial loads, such as electric arc furnaces, used
for melting for example scrap with electric energy, cause
voltage distortion like harmonics and voltage fluctuation in the feeding AC system.
STATCOM
The primary duty of the STATCOM is regulating the voltage in order to improve the voltage profile of the power system.
The factor that plays a very important role in the improvement of the STATCOM performance is the use of power electronics converter as the core of the STATCOM.
Conclusion:-
12 pulse three-level converter provides quality compensation compared with that of the two-level converter
Smaller power transformer with a very lower output has been used and more desirable respond has been achieved.