Measurement of harmonic currents and evaluation of the dc filter performance of the New England - Hydro-Quebec Phase I HVDC Project

Journal Article · Sun Jan 01 04:00:00 EST 1989 · IEEE Trans. Power Del.; (United States)

DOI:https://doi.org/10.1109/61.19270· OSTI ID:6183432

Garrity, T F; Hassan, I D; Donahue, J A

Measurements of harmonic currents in the New England-Hydro-Quebec Phase I HVDC Project de transmission line are presented in this paper. Measurements were conducted to determine the cause of increased telephone interference and to evaluate the dc filter performance. The measurements revealed unexpected high levels of 3-pulse harmonic currents in the dc pole conductors. The cause is attributed to imbalances within the 6-pulse bridges caused by the converter transformer and valve stray capacitances to ground. The conventional model of the converter power circuit used as the basis for the dc filter design does not reproduce the measured 3-pulse harmonics. Modification to this model is required to account for the effect of the converter transformer and valve stray capacitances to ground.

• Research Organization: Ebasco Services Inc., New York, NY (US); New England Power Service Co., Westborough, MA (US)
• OSTI ID: 6183432
• Journal Information: IEEE Trans. Power Del.; (United States), Journal Name: IEEE Trans. Power Del.; (United States) Vol. 4:1; ISSN ITPDE
• Country of Publication: United States
• Language: English

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