• Adil Manzoor
• Aziz Ahmad

The objective of the paper is to design and impeliment a Fact devive that can be used for the improvement of voltage sag and swell. A voltage sag or voltage dip is a short duration reduction in r.m.s voltage which can be caused by a short circuit, overload or starting of electric motors. Voltage sag happens when the r.m.s voltage decreases between 10 and 90 percent of nominal voltage for one-half cycle to one minute. The performance of a DSTATCOM in mitigating voltage sag/ swell is demonstrated with the help of MATLAB. The modeling and simulation results of a DSTATCOM are presented. D-STATCOM is promising device which is used for voltage sag, swell mitigation at distribution side . The process has been done without connecting any FACTS device and then repeated once again by connecting D-STATCOM .The results obtained for the above cases have been compared to analyze the operation of Ds-STATCOM for improving the power quality disturbances. Results obtained shows that the developed D-STATCOM has good capability to starch the voltage level during voltage sag conditions.

Voltage sag and swell,Electric power distribution modelA Coupling transformer, Programmable voltage source,D-STATCOM

"Voltage sag and swell,Electric power distribution modelA Coupling transformer, Programmable voltage source,D-STATCOM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.156-163, April-2019, Available :http://www.jetir.org/papers/JETIR1904P28.pdf

"Voltage sag and swell,Electric power distribution modelA Coupling transformer, Programmable voltage source,D-STATCOM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp156-163, April-2019, Available at : http://www.jetir.org/papers/JETIR1904P28.pdf