Total demand distortion (TDD)
Updated 2026-10-27
Data records
- Total demand distortion in IEEE 519-2022 is the rms of the harmonic current content, excluding interharmonics and taken up to the harmonic order stated in the definition, divided by the maximum demand load current and expressed as a percent, so that it differs from total harmonic distortion only in its denominator.
- Total demand distortion is a dimensionless ratio expressed as a percent of the maximum demand load current.
- In IEEE 519-2022 total demand distortion is the final column of Table 2, Table 3 and Table 4, the current distortion limit tables, and the row of those tables is selected by the short circuit ratio at the point of common coupling.
- 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 519-2022, Harmonic Control in Electric Power Systems, 2022 edition, IEEE. Cited: clause 3.1; clause 5.3. Held as: Purchased single-user copy. Publisher page for IEEE 519-2022Publisher information page
Obtaining the documents
- IEEE 519-2022: available from the publisher
Changelog (4 entries)
| Date | Revision | Change |
|---|---|---|
| 2026-10-27 | created (qty.total-demand-distortion.ieee519.definition) | |
| 2026-10-27 | created (qty.total-demand-distortion.ieee519.unit) | |
| 2026-10-27 | created (qty.total-demand-distortion.ieee519.use) | |
| 2026-10-27 | created (qty.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/quantities/total-demand-distortion/.
Power Quality Reference, Total demand distortion (TDD) (Oct. 27, 2026), https://www.powerqualityreference.com/quantities/total-demand-distortion/.
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title = {Total demand distortion (TDD)},
howpublished = {\url{https://www.powerqualityreference.com/quantities/total-demand-distortion/}},
organization = {Power Quality Reference},
publisher = {Power Quality Reference},
year = {2026},
note = {last substantive change 2026-10-27}
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