Final answer:
Phasor Measurement Units (PMUs) permit the measurement and analysis of electrical quantities in a power system, such as voltage, current, power, and frequency. They are used to monitor the health and performance of the power grid, detect faults, and provide synchronized measurements for time coordination and analysis.
Step-by-step explanation:
Phasor Measurement Units (PMUs) permit the measurement and analysis of electrical quantities in a power system, such as voltage, current, power, and frequency. PMUs are used to monitor the health and performance of the power grid, and they provide real-time data for power system stability analysis, fault detection, and control.
For example, by measuring the phasors of voltage and current at different locations in the power grid, PMUs can help identify abnormalities and disturbances in the system. They can also detect and locate faults, such as short circuits or line outages, and provide synchronized measurements for precise time coordination and analysis.