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arXiv · 1811.05316

Robustness of the Closest Unstable Equilibrium Point Along a P-V Curve

Robert Owusu-Mireku·H. -D. Chiang
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Abstract

In this paper, we study numerically the behavior of the closest unstable equilibrium point (UEP) on the stability boundary of a stable equilibrium point (SEP) of a post-switching power system along a P-V curve. Using the structure-preserving model of the WSCC 9-bus 3-machine system, we show that along the load curve, the closest UEP can switch to a new UEP. We also show that the stability region of the post-switching SEP can expand and contract as the load moves towards the nose point of the P-V curve. Our numerical results also show the impact of the direction of movement of the closest UEP on the size and shape of the stability region of a SEP.

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Robert Owusu-Mireku, H. -D. Chiang. 2018-11-09. Robustness of the Closest Unstable Equilibrium Point Along a P-V Curve. https://arxiv.org/abs/1811.05316

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