ANALYSIS AND OPTIMIZATION OF CONTROL VARIABLES OF VOLTAGE STABILTY ACCESSMENT

ELECTRICAL ENGINEERING

The Gershgorin’s circular disk theorem is proposed in this paper for the analysis of voltage stability. According to this theorem, the diagonal entries of square matrix & sum of the absolute values of the off-diagonal entries of corresponding rows are considered as center of circular disks & a radius of circular disks respectively. It has been proved that the circular disks contain at least one eigenvalue. This theorem is implemented on IEEE-14, 30 & 57 bus test system. The outcomes have proved the better effectiveness of proposed algorithm compared to previous voltage stability assessment technique. The control variables based on voltage stability enhancements are optimized with a recently developed “JAYA” algorithm. The idea of the algorithm is that the resolution obtained for a given problem should move towards the best solution and that avoids the worst solution. It requires only one phase per iteration as TLBO requires two phases per iteration. The proposed algorithm is implemented on IEEE-14 bus test system and the performance is compared with It requires only other familiar TLBO algorithm. In adding together to solving for 14-bus test system, the algorithm is also premeditated on IEEE- 30 bus test system and the performance of “JAYA” algorithm is found better and very simpler.

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