Total demand distortion (TDD)
Updated 2026-10-27
Data records
- IEEE 1159-2019 explains total demand distortion as the measure IEEE 519 introduced because the total harmonic distortion of a current can be misleading at light load: it expresses the harmonic current as a percent of the maximum demand current rather than of the fundamental.
- The term is written Total demand distortion (TDD). Value: Total demand distortion (TDD).
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 4.4.5.2. 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.total-demand-distortion.ieee1159.definition) | |
| 2026-10-27 | created (gloss.total-demand-distortion.title) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"Total demand distortion (TDD)." Power Quality Reference. 2026-10-27. https://www.powerqualityreference.com/glossary/total-demand-distortion/.
Power Quality Reference, Total demand distortion (TDD) (Oct. 27, 2026), https://www.powerqualityreference.com/glossary/total-demand-distortion/.
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title = {Total demand distortion (TDD)},
howpublished = {\url{https://www.powerqualityreference.com/glossary/total-demand-distortion/}},
organization = {Power Quality Reference},
publisher = {Power Quality Reference},
year = {2026},
note = {last substantive change 2026-10-27}
}{{cite web |title=Total demand distortion (TDD) |website=Power Quality Reference |publisher=Power Quality Reference |url=https://www.powerqualityreference.com/glossary/total-demand-distortion/ |date=2026-10-27 |access-date=}}