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A new method for power system transient instability detection

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2 Author(s)
Liancheng Wang ; Dept. of Electr. & Comput. Eng., Clemson Univ., SC, USA ; Girgis, A.A.

Reliability and computational simplicity are of primary importance in developing on-line instability detection methods. With regard to these requirements, this paper has proposed a new method for instability detection based on generator angles, angular velocities, and their rates of change. According to the developed method, system instability or out-of-step condition is detected by identifying the characteristics-concave or convex-of a surface on which the post-fault system trajectory lies. The variation mode and probabilistic property of the proposed index are investigated by using the 10 machine 39 bus IEEE test system

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Power Delivery, IEEE Transactions on  (Volume:12 ,  Issue: 3 )