Smart transmission and wide-area monitoring system
Global positioning system (GPS) time-synchronized phasor measurement units (PMUs) were introduced in the 1980s and have been gradually deployed throughout the electric power system. At present, almost all the major countries in the world have ambitious PMU deployment plans. The applications of a PMU-based wide-area monitoring system (WAMS) in electric transmission grid management have attracted continuous interest as a result. In this chapter, after a brief introduction of its principles and development history, the architecture of WAMS is introduced and its many applications in smart transmission are summarized. Furthermore, FNET/GridEye, which is a pioneering WAMS system, is also introduced in this chapter as an example of WAMS.