Early warning system based on power system steady state and dynamic security assessment

Abstract

Existing security and reliability based EMS applications (e.g. Online Dispatcher Power Flow, Online Contingency Evaluation, Online Short Circuit Calculation, etc.) normally take real time snapshot of the system and perform necessary studies to evaluate the security and reliability of the network. As these applications do not provide any information about the security level of the system for the near future, the operator in control center may not get enough time to effectively arrange for proper corrective actions in case of security criteria violation. This paper presents an online early warning system based on steady state and dynamic security assessment which looks ahead and generate proper alarm for operators in case security criteria is expected to violate in near future. The proposed system can easily be integrated with SCADA/EMS system for transmission control room application to give operator a wide view of the entire network and help him in better control and monitoring of the power grid.