Optimal placement of TCSC using linear decreasing inertia weight gravitational search algorithm

Purwoharjono*, Muhammad Abdillah, Ontoseno Penangsang, Adi Soeprijanto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


This paper represents the improvement of the Gravitational Search Algorithm method (GSA) using Linear Decreasing Inertia Weight (LDIW) which is implemented to determine the optimal placement of TCSC locations and the best rating of the TCSC in the standard limit on the electric power transmission lines. TCSC is one of FACTS devices which can perform the compensation of the power system. GSA method is a new metaheuristic method inspired by Newton's laws of gravity and mass motion. LDIW-GSA is used to control the speed of the particles on the GSA, so as to improve the performance of the GSA method. The implementation of LDIW-GSA used the Java-Bali 500 kV power system. Before optimization, TCSC load flow results indicated that there was 297.607MW of active power losses and 2926.825 MVAR of reactive power losses. While the results of TCSC load flow was 279. 405 MW of active power losses and reactive power losses was 2082.203 MVAR after optimization using GSA standard. It was obtained 278.655 MW of active power losses and active power losses of 1768.374 MVAR with the use of LDIW-GSA. It was better to be used to minimize power losses in transmission line and also it can improve the value of the voltage in the range of 1 ± 0.95 compared to GSA standards prior to placement optimization of TCSC.

Original languageEnglish
Pages (from-to)460-470
Number of pages11
JournalJournal of Theoretical and Applied Information Technology
Issue number2
Publication statusPublished - Jan 2013


  • (AHPS)
  • Facts device
  • Gravitational search algorithm (GSA)
  • Linear decreasing inertia weight (LDIW)
  • Thyristor controlled series capacitor (TCSC)


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