What is the primary function of a Phasor Measurement Unit (PMU)?

The primary function of a Phasor Measurement Unit (PMU) is to provide real-time monitoring and management of electric power systems. PMUs collect data on electrical waveforms, such as voltage and current, at a granular level across the power grid, which allows operators to analyze the state of the grid quickly and accurately.

While option B mentions monitoring, which aligns closely with the function of a PMU, it does simplify the role. It’s not only about caching information for daily consumption; the PMU delivers synoptic measurements that help in improving the reliability and performance of power systems. It directly contributes to grid stability by enabling fast data analysis and response, which is crucial for high-voltage transmission monitoring.

The other options do not correspond to the functions of a PMU. They involve different areas such as IoT location services, network traffic management, and user authentication in blockchain systems, none of which relate directly to the electric power function and purpose of a PMU.