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Waveform Measurement Unit

A sensor device that records time-synchronized synchro-waveform measurements of voltage and current.

Definition in an IEEE Standard

Source: 1 (p10)

The sensor device to record synchro-waveforms may be referred to as waveform measurement unit (WMU). WMUs record time-synchronized waveform measurements of voltage and current at different locations of a power system. In some literature, synchro-waveforms are also referred to as time-synchronized point-on-wave (POW) measurements or time-synchronized sampled values (TSSVs). WMUs are also in some literature referred to as POW sensors or synchro-waveform measurement units (SMUs).

Last modified: 2025-11-03

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  1. Mohsenian-Rad, Hamed and Joo, Jhi-Young and Balestrieri, Michael and Piyasinghe, Lakshan and Biswas, Shuchismita and Chatterjee, Kaustav and Valizadeh-Haghi, Hamed and Chang, Kyle and Grappe, Joseph and Laughner, Theo and Blair, Steven and Mullins, Chris and Liu, Yilu and Wu, Yuru and Sun, Biao and and others (2024). Synchro-Waveform Measurements and Data Analytics in Power Systems (TR 127). https://doi.org/10.17023/7SWD-QP23 ↩