Implementation and Applications of Wide-area monitoring systems

This paper discusses the design and applications of wide area monitoring and control systems, which can complement classical protection systems and SCADA/EMS applications. System wide installed phasor measurement units send their measured data to a central computer, where snapshots of the dynamic system behavior are made available online. This new quality of system information opens up a wide range of new applications to assess and actively maintain system's stability in case of voltage, angle or frequency instability, thermal overload and oscillations. Recent developed algorithms and their design for these application areas are introduced. With practical examples the benefits in terms of system security are shown..