02064nam a22001097a 4500100006400000245008100064260003000145300000900175500169600184700004201880856003201922  aGul Hassan Soomroa15MPE06aSupervisor - Dr. Suhail Khokhar  aAnalysis of Voltage SAG Mitigation Technique Using Dynamic Voltage Restorer   aNawabshah:bQUEST,c2018.  a55p.  aABSTRACT

Voltage sag disturbance is the most severe and commonly occurring problem in power distribution system . Due to voltage sag nominal supply voltage will be going out of phase to the power consumer's side. Voltage sag disturbance occur due to faults such as single line to ground fault, line to line ground fault and three phases to ground faults which occur in power distribution system. It also occurs due to starting of induction motors and application of heavy loads in power distribution system. Therefore voltage sag power quality problem must be immediately compensated so as to keep electrical components safe from damage. It is done to compensate voltage sag by  implementing  custom  power device such  as Dynamic  Voltage Restorer. (DVR)  is implementing to mitigate voltage sag on critical loads dynamically. The DVR contain sub operating parts such as voltage source converter (VSC), passive filters,  energy  storage  lead  acid  battery  and  injection  transformer  which  inject appropriate  voltage  magnitude  to  keep  balanced  load  voltage  magnitude. The objective of this research is to generate voltage sag disturbance in tested distribution model and implementation of DVR in tested distribution model as to mitigate voltage sag disturbance  which  is  created  in  distributed  tested  model.  The voltage  sag
disturbance is created in tested system as to applying faults such as single line to ground fault, double line to ground fault and three phases to ground fault. The experimentaI and simulation results of DVR using MATLAB software ensure the performance of DVR to mitigate voltage sag power quality problem in tested power distribution model.


  aDepartment of Electrical Engineering   uhttp://tinyurl.com/4959p9zx