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Small Noise in Power System Dynamics and its Relation to Security Assessment

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2 Author(s)
Demarco, C.L. ; Department of Electrical and Computer Engineering, University of Wisconsin, Madison WI 53706 ; Bergen, A.R.

This work develops a new method of quantifying the security of a stable operating point in an electric power system with respect to small random variations in load demand. For a nonlinear model of the power system dynamics which includes a white noise disturbance in the loads, the expected exit time of trajectories of the system from a set approximating the deterministic region of attraction is calculated in the small noise limit. This expected exit time is proposed as a security measure.

Published in:

American Control Conference, 1985

Date of Conference:

19-21 June 1985