Abstract:This paper proposes a composite security index for the on-line critical contingency selection and ranking in terms of both the line flow and bus voltage limit violations. In order to evaluate the vector valued security index, a scalar index is derived based on the concept of hyper-ellipse inscribed within a hyperbox. The proposed index, which provides an efficient method for filtering and ranking the credible contingencies are defined in such a way that a proper differentiation between the secure and insecure … Show more
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