The concept and working principle of wide area phase measurement is introduced. The application of this tech-nology applied in power system stable monitor (power angle real-time monitor) and application prospect in other fields are discussed.%阐述广域相量测量技术的概念以及工作原理,介绍该技术在电力系统稳定监测(即功角实时监测)及其它领域的应用前景。
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