دانلود Compensation of voltage flicker by using facts dev

Abstract

Voltage flicker occurs when heavy loads are periodically turned on and off in a weak distribution system. If the distribution  system’s  short  circuit  capacity  is  not  large  enough,  voltage  fluctuations  will  occur.  Voltage  flickering  can  be extremely harmful to sensitive electronic equipment. Computerized equipment requires stable voltage to perform properly. This paper covers the contrasting approaches; dealing  with  the  voltage flicker  mitigation  in three stages and assessing the related  results  in  details.  Initially,  the  voltage  flicker  mitigation,  using  FCTCR  (Fixed  Capacitor  Thyristor  Controlled Reactor),  was  simulated.  Secondly,  the  compensation  for  the  Static  Synchronous  Compensator  (STATCOM)  has  been performed. In this case, injection of harmonics into the system caused some problems which were later overcome by using 12-pulse assignment of SATCOM and RLC filters. The obtained results show that STATCOM is very efficient and effective for the flicker compensation. All the simulations have been performed on the MATLAB Software.