Summary form only given. The aim of this paper is to introduce a new methodology, based on dynamic optimization, for assessing preventive control actions to guarantee dynamic security of power systems. In order to mitigate the effect of a contingency, in terms of steady-state or transient violation such as overloads, unacceptable transient voltage dips, system instability, preventive actions are applied as soon as a potentially dangerous violation is detected during a contingency screening. The proposed approach entails the ability to force the system trajectories in an acceptable state space domain under a set of severe but credible contingencies and gives indications about preventive actions when necessary. The approach is sufficiently general to improve the transient behavior of a power system with regard to different objectives such as: to enforce angle stability of the system constraining rotor angle deviations and minimizing the integral of transient kinetic energy across the whole trajectory; and to avoid transient voltage stability using a signal energy based on an integral form of the voltage magnitude at each bus of the system. This methodology consists of an optimization procedure where: the objective function is aimed at minimizing control action efforts; inequality constraints confine the trajectory of the system in a practical domain of the state space ensuring a feasible behavior of the system, power quality, etc.; and equality constraints derive from the discretization of the differential-algebraic equations of the power system sparse representation.

Online dynamic security control in a large scale power system / De Tuglie, E.; Dicorato, M.; La Scala, M.; Scarpellini, P.. - STAMPA. - (1999), p. 233. (Intervento presentato al convegno International conference on electric power engineering, Powertech 99 tenutosi a Budapest, Hungary nel August 29 -September 2, 1999) [10.1109/PTC.1999.826665].

Online dynamic security control in a large scale power system

E. De Tuglie;M. Dicorato;M. La Scala;
1999-01-01

Abstract

Summary form only given. The aim of this paper is to introduce a new methodology, based on dynamic optimization, for assessing preventive control actions to guarantee dynamic security of power systems. In order to mitigate the effect of a contingency, in terms of steady-state or transient violation such as overloads, unacceptable transient voltage dips, system instability, preventive actions are applied as soon as a potentially dangerous violation is detected during a contingency screening. The proposed approach entails the ability to force the system trajectories in an acceptable state space domain under a set of severe but credible contingencies and gives indications about preventive actions when necessary. The approach is sufficiently general to improve the transient behavior of a power system with regard to different objectives such as: to enforce angle stability of the system constraining rotor angle deviations and minimizing the integral of transient kinetic energy across the whole trajectory; and to avoid transient voltage stability using a signal energy based on an integral form of the voltage magnitude at each bus of the system. This methodology consists of an optimization procedure where: the objective function is aimed at minimizing control action efforts; inequality constraints confine the trajectory of the system in a practical domain of the state space ensuring a feasible behavior of the system, power quality, etc.; and equality constraints derive from the discretization of the differential-algebraic equations of the power system sparse representation.
1999
International conference on electric power engineering, Powertech 99
0-7803-5836-8
Online dynamic security control in a large scale power system / De Tuglie, E.; Dicorato, M.; La Scala, M.; Scarpellini, P.. - STAMPA. - (1999), p. 233. (Intervento presentato al convegno International conference on electric power engineering, Powertech 99 tenutosi a Budapest, Hungary nel August 29 -September 2, 1999) [10.1109/PTC.1999.826665].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/17161
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