TY  - JOUR
T1  - Optimal Placement of FACTs Devices Using Hybrid Line Stability Index
AU - Ibrahim, Luay G. AU - AL-Rubayi, Rashid H. 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 8
SP  - 2739
EP  - 2744
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.2739.2744
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.2739.2744
KW  - Hybrid line stability index
KW  -FACTS device
KW  -voltage stability index
KW  -(Lmn)
KW  -(FVSI)
KW  -(HLSI)
AB  - The many of the power cuts in the electricity system in the last decade and in recent times indicate
that much research yet necessarily to be done to address the instability voltage and the ensuing collapse. This
study presents a method to find and select the optimum location of FACTs device using the Hybrid Line
Stability Index (HLSI) that is appropriate for the prediction voltage collapse in power system networks. Such
the HLSI was obtained by deriving expressions basics equivalent line stability index (Lmn) and Fast Voltage
Stability Index (FVSI) and mix their through a switch logic based on the voltage angle difference where indicate
the nearness voltage collapse. The HLSI has tested on IEEE 9-bus system it gives the same results as the other
indicators (Lmn and FVSI). For the base state, IEEE 9-bus system was found to be stable with all the three
indicators has approximately equal values <1 for all lines. The contingency state detect that ranks of bus 5 the
weakest bus in the system with the lower maximum allowable reactive load of (120 MVar) and the line critical
concerning bus 5, the line connecting bus 5-7. The values the three indicators, Lmn, FVSI and HSLI,
approximately equal increasing the accuracy of HLSI.
ER  -