Power frequency variation
Updated 2026-10-27
Data records
- In IEEE 1159-2019 a power frequency variation is the deviation of the fundamental frequency from its nominal value, following the balance between load and available generation; small local variations occur continuously, while large excursions follow bulk system faults, the loss of a large block of load or the loss of a generator.
- The term is written Power frequency variation. Value: Power frequency variation.
Sources
- Electrical Testing Reference editorial taxonomy, Electrical Testing Reference editorial taxonomy of test methods, 2026-10 edition, Electrical Testing Reference. Held as: Own observation.
- IEEE 1159-2019, Recommended Practice for Monitoring Electric Power Quality, 2019 edition, IEEE. Cited: clause 4.4.7. Held as: Purchased single-user copy. Publisher page for IEEE 1159-2019Publisher information page
Obtaining the documents
- IEEE 1159-2019: available from the publisher
Changelog (2 entries)
| Date | Revision | Change |
|---|---|---|
| 2026-10-27 | created (gloss.frequency-variation.ieee1159.definition) | |
| 2026-10-27 | created (gloss.frequency-variation.title) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"Power frequency variation." Power Quality Reference. 2026-10-27. https://www.powerqualityreference.com/glossary/frequency-variation/.
Power Quality Reference, Power frequency variation (Oct. 27, 2026), https://www.powerqualityreference.com/glossary/frequency-variation/.
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title = {Power frequency variation},
howpublished = {\url{https://www.powerqualityreference.com/glossary/frequency-variation/}},
organization = {Power Quality Reference},
publisher = {Power Quality Reference},
year = {2026},
note = {last substantive change 2026-10-27}
}{{cite web |title=Power frequency variation |website=Power Quality Reference |publisher=Power Quality Reference |url=https://www.powerqualityreference.com/glossary/frequency-variation/ |date=2026-10-27 |access-date=}}