PMUs - A new approach to power network monitoring

Phasor measurement Being able to determine phasors across the power system at a fixed point in time has the potential to solve these problems. One of the key components of future utility systems will therefore be Phasor Measurement Units (PMUs). PMUs rely on a GPS time signal for extremely accurate time-stamping of the power system information. A GPS satellite receiver (see box on page 60) provides a precise timing pulse, which is correlated with sampled voltage and current inputs typically the three phase voltages of a substation and the currents in lines, transformers, and loads terminating at the substation. From these 1 PMUs – A new approach to power network monitoring