OMASES-open market access and security assessment system: an approach to preventive dynamic security assessment and control

The paper reports on the activity of an EU funded research project named OMASES that concerns a preventive approach to dynamic security assessment (DSA) and control of large power systems. The aims of the project are presented. A short description of the hardware and software architecture for implementing on-line DSA are recalled. Some hints about the theoretical background for the specific applications within OMASES (TSA-transient stability assessment, VSA-voltage stability assessment, TS-training simulator and MS-market simulator) are described. Preliminary results of the prototyping phase are commented upon.

Extended Summary

The European Directory 92/96 [1] concerning the liberalization of the electricity market has generated significant changes in the planning, operation and management of electric power systems [2]. The electric power systems are more and more interconnected and the open access for independent power producers (IPP) - almost accomplished everywhere, results in possible congestions for transmission systems. Other important dynamic problems may arise when exploiting the system at or close to maximum power transfer. Example of these problems are transient stability and voltage stability. Moreover, the complexity of power system operation - particularly under stressed conditions involving protection intervention and operator actions, the necessity of understanding the economic mechanism involved in the market call for adequate training frameworks [3].