P847 PMU

Time synchronized phasor measurement (i.e. synchrophasors) involves measuring electric system frequencies and phase angles very precisely from 20-120 times every second at various points across the electrical grid over large geographic areas. Synchrophasor measurements are time stamped using very precise time sources such as the Global Positioning Systems (GPS) satellite signals. This provides very detailed and precise time synchronized measurements of the state of the electrical grid.

Analysis of past electricity blackouts has indicated that monitoring synchrophasors in this way has the potential to detect system instability much earlier than current Supervisory Control and Data Acquisition (SCADA) systems. This will prevent large-scale blackouts by giving system operators more time to respond to disruptive events enabling them to take corrective action before system stability is affected. Synchrophasor projects involving the installation of hundreds of Phasor Measurement Units (PMUs) are currently taking place across North America.

The standalone P847 Phasor Measurement Unit answers to this application. You can put P847 in your grid at the specific sensing point in your system.

For a very common single bus feeder application, one P847 PMU is sufficient. For a decoupled double bus, each connected to a feeder, or a single bus connected to double lines, two P847s would be needed for comprehensive measurements.

There is no need to install PMUs at every bus of the system as it will not necessarily contribute to efficient system operation and could cause unnecessary congestion in the communications system.

Consult P847 Servic Manual for more applicatoin details.