Data record `std.ieee-1159.structure.frequency-variations`

Verified 2026-10-27 Confidence: High

Clause 4.4.7 of IEEE 1159-2019 describes power frequency variations as deviations of the fundamental from nominal that follow the balance between load and generation, with large excursions caused by bulk system faults or the loss of a large load or generator, and with isolated generators the most exposed case.

Provenance. Where this record comes from and where it is used: the cited source, the record itself and the entry that cites it.

Provenance: the chain from source to entry.
Step	Item	Detail
Source	IEEE 1159-2019	Licensed standard, clause 4.4.7
Data record	std.ieee-1159.structure.frequency-variations	Verified 2026-10-27
Entry	IEEE Recommended Practice for Monitoring Electric Power Quality	No revisions

Subject: IEEE Recommended Practice for Monitoring Electric Power Quality (Standards)
Kind: Standard scope
Source: IEEE 1159-2019, clause 4.4.7, Recommended Practice for Monitoring Electric Power Quality, IEEE. Publisher page Publisher information page

History

Every recorded change to this data record, oldest first.
Date	Change
2026-10-27	created

Cite this page

Cite the governing standard for the fact itself; cite this page as the finding aid.

"Data record std.ieee-1159.structure.frequency-variations." Power Quality Reference. 2026-10-27. https://www.powerqualityreference.com/data/std.ieee-1159.structure.frequency-variations/.

Power Quality Reference, Data record std.ieee-1159.structure.frequency-variations (Oct. 27, 2026), https://www.powerqualityreference.com/data/std.ieee-1159.structure.frequency-variations/.

@misc{etr-data-std-ieee-1159-structure-frequency-variations,
  title = {Data record std.ieee-1159.structure.frequency-variations},
  howpublished = {\url{https://www.powerqualityreference.com/data/std.ieee-1159.structure.frequency-variations/}},
  organization = {Power Quality Reference},
  publisher = {Power Quality Reference},
  year = {2026},
  note = {last substantive change 2026-10-27}
}

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