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Power system security assessment both for planning (off-line) studies and for operational (on-line) applications is performed by various analysis methods which highlight different phenomena (steady-state violations, angle stability, voltage stability, etc.) in order to retrieve an exhaustive vision of the problems. Besides traditional deterministic tools, recently proposed probabilistic tools may...
Artificial neural network (ANN) and decision tree (DT) applications are proposed to contribute to control room energy management system (EMS) functions respectively aimed to assess critical conditions leading to inter-area oscillations, to evaluate the loading margin, and to support state estimation. To facilitate the design, the setting of the parameters, the training of ANNs and the growing of DTs,...
In operational practice power system security analyses are usually conducted with respect to "credible" contingencies, such as almost all N-l contingencies and some N-2 contingencies suggested by operational experience. On the contrary, extreme contingencies are generally not evaluated, although they can be responsible for major system disturbances and seriously jeopardize system security;...
This paper addresses the presentation of a comprehensive tool for the analysis of electromechanical oscillations, through a complete or selective method, and the optimisation of the PSSs tuning to damp possible critical modes. The single components of the tool are presented separately and finally the interaction logic for the solution of the problem is presented. The tool is fully integrated in a...
The increased complexity of power systems and their related controls requires more and more sophisticated analytic tools. Moreover, actual systems are often managed close to their technical limits. Thus, the functions of security analysis, both static and dynamic, become mandatory. In particular, fast time-domain simulations can be used for dynamic security assessment. This paper presents an effective...
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