摘要：Synchronized voltage and current phasor measurements provided by phasor measurement units (PMUs) can potentially augment power system monitoring, control, and protection functions. PMUs use GPS receivers to synchronize measurements across a wide geographical area. However, GPS signals are vulnerable to jamming, spoofing, and accidental receiver malfunctions. The authors present a multi-layered multi- receiver architecture that hardens GPS-based timing against these hazards. The article describes eight countermeasures that address five known threat models and an experiment to test the viability of this approach. Analysis demonstrates high reliability and robustness for the new architecture
