M. Eidiani, M. Oloomi Buygi, and S. Ahmadi
ATC, VSA, TSA, energy function
This paper presents a fast and accurate dynamic method for ATC calculations considering transient stability analysis (TSA) and voltage stability analysis (VSA) termination criteria (CTV method). This method can be used for contingency screening and ranking. Estimation of the determinant of Jacobian matrix is used for assessment of voltage stability. This method is compared with the following methods: energy difference between SEP (stable equilibrium point) and UEP (unstable equilibrium point), ts index of Chiang, and continuation power flow. The TSA method uses Athay’s PEBS (potential energy boundary surface) and a new method named POMP. The POMP method follows the Point Of Maximum Potential energy on post-fault system trajectory. This point is approximated by Taylor’s expansion of second order. Because this method does not use any convergent algorithm, it is more reliable than all existing methods that use UEP. The goals of this method are assessment of ATC considering VSA and TSA and assessment of dangerous contingencies. The ideas are demonstrated on 2, 3, 7 (Cigre), 10, 30 (IEEE) and 145 (Iowa State) bus networks.
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