Eng. &Tech. Journal, Vol.31, Part (A), No.15, 2013 2805 Enhancement of a Power System Transient Stability Using Static Synchronous Compensator STATCOM Naseer M. Yasin Electrical and Electronic Technical College, Fondation of Technical Education/ Baghdad Email: naseeryasin@yahoo.com Dr. Mustafa M. Al-Eedany College Electrical Engineering, University of Basrah/ Basrah Received on: 24/12/2012 & Accepted on: 9/5/2013 ABSTRACT In modern power system utilities, increased power demand often lead to the situation where the system no longer remains in secure operating region. Flexible AC Transmission Systems (FACTS) controllers can play an important roll in power system security enhancement. The goal of FACTS devices study is to measure their impact on the state of the electrical networks into which they are introduced. Their principal function is to improve the static and dynamic properties of the electrical networks and that by increasing the margins of static and dynamic stability. In this paper the modeling of Static Synchronous Compensator (STATCOM) within Newton-Raphson power flow equations has been presented, discussed, implemented and the transient stability of a power system was tested when three phase fault is applied at a certain branch of the power system. Case studies are carried out on a 5- bus and a 30-bus test systems to demonstrate the effectiveness of the proposed model. Keywords: Load flow analysis, Newton-Raphson, STATCOM. ﻟ اﻟﻌﺎﺑرة اﻻﺳﺗﻘرارﯾﺔ ﺗﻌزﯾز اﻟﺗزاﻣﻧﻲ اﻟﻣﻌوض ﺑﺄﺳﺗﺧدام اﻟﻘدرة ﻧظﺎم اﻟﺛﺎﺑت اﻟﺧﻼﺻﺔ ﺎم اﻟﻧظﺎء ﺑﻘدم ﻋﻰ اﻟؤدي ﯾﺔ اﻟﺣدﯾﺛﺔ اﻟطﺎﻗﺎت ﻣﻧﺷﻲ ﻓﺔ اﻟﻛﮭرﺑﺎﺋﯾﺔ اﻟطﺎﻗﻰ ﻋﻠب اﻟطﻠﺎدة زﯾ اﻻﻣﻧﺔ اﻟﻣﻧطﻘﺔ ﻓﻲ اﻟﻛﮭرﺑﺎﺋﻲ. اﺟﮭزة ﺗﺳﺗطﯾﻊن اﻣز ﺗﻌزﯾﻲ ﻓم ﻣﮭ دورب ﻟﻌﺔ اﻟﻣرﻧ اﻟﺗﺑﺎدﻟﻲ اﻟﺗﯾﺎر ﻧﻘل ﻣﻧظ و اﻟطﺎﻗﺔ ﻣﺔ. اﺔ ﺣﺎﻟﻰ ﻋﻠزة اﻻﺟﮭذه ھﻊ وﻗﺎس ﻗﯾو ھزة اﻻﺟﮭذه ھﺔ دراﺳن ﻣ اﻟﮭدف انﺑﻛﺎت ﻟﺷ اﻟﻛﮭرﺑﺎﺋﯾﺔ. طﺔ ﺑواﺳﺔ اﻟﻛﮭرﺑﺎﺋﯾﺑﻛﺔ ﻟﻠﺷ واﻟﺣرﻛﯾﺔ اﻟﺛﺎﺑﺗﺔصواﺧ اﻟ ﺗطوﯾر ھو اﻻﺟﮭزة ھذه ﻋﻣلأ ﻣﺑد ان اﻟ زﯾﺎدة ﺣﺔ واﻟﺣرﻛﯾﺔ اﻟﺛﺎﺑﺗﺗﻘرارﯾﺔﺳﻼ ﻟح اﻟﻣﺳﻣو د. دﯾم ﺗﻘم ﺗث اﻟﺑﺣذا ھﻲ ﻓق وﺗطﺑﯾﺔ وﻣﻧﺎﻗﺷل ﻣودﯾ درة اﻟﻘرﯾﺎن ﻟﺳون راﺑﺳوﺗن ﻧﯾﺎدﻻت ﻣﻌدامﺧﺳﺗﺄ ﺑ اﻻﺟﮭزة ﻟﮭذه, ﺎ ﻛﻣﺎﺑرة اﻟﻌﺗﻘرارﯾﺔ اﻻﺳص ﻓﺣم وﺗ اﻟﻛﮭرﺑﺎﺋﻲ اﻟﻧظﺎمع ﻓرو اﺣد ﻓﻲﺛﻲﻼ ﺛﺄط ﺧث ﺣدو ﻋﻧد. د ﻋﻘﺔﻣﺳ ﺧ ذوﺎم ﻟﻧظﻲ ھ اﻟﻣطروﺣﺔ اﻟدراﺳﺔ ح اﻟﻣﻘﺗر اﻟﻧظﺎمﺛﯾرﺄ ﺗﺢﯾﺿ ﻟﺗو ﻋﻘدةﺛﯾنﻼ ﺛ ذورﺧ وا.