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Coupling Optimization and Dynamic Simulation for Preventive-Corrective Control of Voltage Instability

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3 Author(s)
Capitanescu, F. ; Dept. of Electr. Eng. & Comput. Sci. (Montefiore Inst.), Univ. of Liege, Liege ; Van Cutsem, T. ; Wehenkel, L.

This paper proposes an approach coupling security-constrained optimal power flow with time-domain simulation to determine an optimal combination of preventive and corrective controls ensuring a voltage stable transition of the system towards a feasible long-term equilibrium, if any of a set of postulated contingencies occurs. A security-constrained optimal power flow is used to adjust the respective contribution of preventive and corrective actions. Furthermore, information is extracted from (quasi steady-state) time-domain simulations to iteratively adjust the set of coupling constraints used by a corrective security-constrained optimal power flow until its solution is found dynamically secure and viable. Numerical results are provided on a realistic 55-bus test system.

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Power Systems, IEEE Transactions on  (Volume:24 ,  Issue: 2 )