Information Technology

Gartner Glossary

Phasor Measurement Units (PMUs)

Synchronized phasor measurement units (PMUs, or synchrophasors) provide instantaneous representations of voltages and currents at key power grid locations, and help diagnose the grid’s actual risk status. Deployment of PMUs can help transmission operators with early detection of the frequency oscillations that foreshadow a potential blackout. Operators can improve transfer capacity, manage congestion and integrate renewables more effectively.

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