Power grid event detection and mitigation using phasor measurement units

相量测量单元（PMU）的引入代表了公用事业公司在广泛区域内监测和控制其资产的能力的重大转变。这是由于两个关键因素。第一个是异常高的报告速率-在北美通常是每秒30或60帧，这取决于所使用的标准。这比传统数据收集高出几个数量级，后者依赖于每隔几秒（或几分钟）扫描一次单个设备。PMU的第二个主要优点在于通过基于GPS的定时实现系统电压和电流的全局同步采样。

The introduction of phasor measurement units (PMUs) represents a significant shift in the ability of utility companies to monitor and control their assets over a wide area. This is due to two key factors. The first is an unconventionally high reporting rate---typically 30 or 60 frames per second in North America, depending on the standard used. This is orders of magnitude higher than legacy data collection, which relies on scanning individual devices every few seconds (or minutes). The second major benefit of PMUs lies in the utilization of globally-synchronized sampling of system voltages and currents, achieved via GPS-based timing.