Electrical Engineering

, Volume 100, Issue 2, pp 913–933 | Cite as

A new interactive sine cosine algorithm for loading margin stability improvement under contingency

  • Belkacem Mahdad
  • K. Srairi
Original Paper


In this paper, a new method called sine cosine algorithm is adapted in coordination with an interactive process to improve the power system security considering loading margin stability and faults at specified important branches. In this study, the loading margin stability is optimized in coordination with total cost, total power loss, total voltage deviation and voltage stability index. In order to locate the best loading margin stability, an initial global database containing suboptimized control variables is generated based on two indices named global and local critical reactive margin security related to generating units. The optimized loading margin stability is improved in coordination with the availability of reactive power of different shunt FACTS devices installed at particular locations. The robustness of the proposed planning strategy is validated on a small test system, the IEEE 30-Bus and to a large test system, the IEEE 118-Bus. Optimized results found confirmed clearly the improvement of loading margin stability at critical situations such as faults at specified branches.


Loading margin stability Security OPF Contingency Metaheuristic methods Sine cosine algorithm Shunt FACTS Critical reactive margin stability 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Department of Electrical EngineeringUniversity of BiskraBiskraAlgeria

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