Determination of the effect of harmonics on pipe-type power cable AC/DC resistance ratios

Author

Palmer, John A. ; Degeneff, Robert C. ; McKernan, Thomas M. ; Halleran, Thomas M.

Author_Institution

Rensselaer Polytech. Inst., Troy, NY, USA

Volume

29

Issue

2

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1427

Lastpage

1433

Abstract

The authors present a closed-form expression for computing the AC/DC resistance ratio of high-pressure fluid-filled (HPFF) pipe-type cable in the presence of harmonics. Industry computes this factor with the assumption that the currents are purely sinusoidal at 60 Hz. However, as levels of harmonics increase on power systems, concern for the effect of harmonics on system ampacities rises. The authors develop a closed-form hybrid of the resistance ratio equations presented by J.H. Neher and M.H. McGrath (1957), and they compare the results with measured data at 60 Hz. No measured data are available for the resistance ratio at higher frequencies, so a two-dimensional finite element model is developed to view the effect of frequency on the resistance ratio. The effect of a specific harmonics scenario on the resistance ratio of a given system is discussed, and results are presented for some example systems

Keywords

finite element analysis; power cables; power system harmonics; underground cables; 60 Hz; AC/DC resistance ratios; closed-form expression; effect of harmonics; high-pressure fluid-filled cable; pipe-type power cable; two-dimensional finite element model; underground cables; Closed-form solution; Computer industry; Electrical resistance measurement; Equations; Finite element methods; Frequency measurement; Hybrid power systems; Power cables; Power system harmonics; Power system measurements;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.250671

Filename

250671