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Power System Dynamic Security Region and Its Approximations

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4 Author(s)
Ancheng Xue ; Dept. of Electr. Eng., Tsinghua Univ., Beijing ; Wu, F.F. ; Qiang Lu ; Shengwei Mei

Dynamic security region (DSR) for security assessment and preventive control is defined in terms of variables that are under the control of the dispatcher prior to a fault. The boundary of DSR can be expressed using the function describing the stable manifold of the controlling unstable equilibrium point. The function is shown to be the solution of a partial differential equation. Quadratic and linear approximations to the function characterizing the boundary of DSR are derived. Numerical tests of the approximations are conducted. Potential applications of the method are discussed

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Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:53 ,  Issue: 12 )