par Sezi, Tevfik T.S.;Maun, Jean Claude ;Warichet, Jacques ;Genet, Benjamin
Référence (25-27 April 2006: Moscow Russia), CIGRE Conference on Monitoring of Power System Dynamic Performance
Publication Publié, 2006-04-26
Publication dans des actes
Résumé : The emerging technology “Wide Area Monitoring, Protection and Control - WAMPC” can extend the application areas of System Protection Scheme (SPS) based solutions and may be applied in very large areas like the UCTE transmission system. Research activities in recent years have shown that different problems of large power systems can be identified with WAMPC based systems using Phasor Measurement Units (PMUs). On the other side, the political reality shows that the implementation of a WAMPC system in an area covered by more than one utility seems from today’s point of view nearly impossible, especially if the utilities are located in different countries.In this paper, the basic ideas for the implementation of a “Flexible System Protection Scheme” in a geographical limited area are presented, using PMUs as modern Remote Terminal Units (RTUs). The goal is to understand and solve the well known two power system problems voltage instability and small signal angle instability leading to inter area oscillations.A prototype of a monitoring system including Phasor Measurement Units, Digital Fault Recorders with Phasor Measurement capability and a Personal Computer with a Central Software connected to the mentioned field units (DFRs and PMUs) for real time data retrieving and visualization is being prepared for the first measurements.The in this paper proposed solutions encourages utilities to a long term investment policy to upgrade protection relays and other Intelligent Electronic Devices (IEDs) like bay controllers with new ones capable of the communication protocol IEC61850, which will lead to useful implementation of System Protection Schemes, especially in regard to fast and secure load shedding.Although there are several promising signs that the new technology will help to operate the power system more secure and reliable, one should be aware of the fact that the installation of PMUs in various locations of the power system will not solve any problem. Long term investments into the communication infrastructure and detailed planning studies will be required before adequate system wide solutions can be implemented. Also, it must be considered that a promising Flexible System Protection Scheme will require very reliable central software; where valuable experience of power system operators and protection engineers should be incorporated during the development phase.