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Contingency analysis is a key function in the Energy Management System (EMS) to assess the impact of various combinations of power system component failures based on state estimation. Contingency analysis is also extensively used in power market operation for feasibility test of market solutions. High performance computing holds the promise of faster analysis of more contingency cases for the purpose...
This paper presents the practical experience of the Brazilian System Operator with the online dynamic security assessment. More specifically, it describes the adopted models, analytical methods and functions, performance, EMS integration, user interface and implementation issues. Examples of situations in which the online security assessment was very useful are also shown.
Most energy management system applications are developed based on the positive sequence network model. While it is commonly assumed that this is a reasonable approximation for steady state analysis, quantifying the amount of error introduced as a result of this approximation is needed. Furthermore, methods to minimize the impact of these errors on the network applications must also be developed. This...
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