Proximity effect and eddy current losses in insulated cables

Ferkal, K.; Poloujadoff, M.; Dorison, E.

doi:10.1109/61.517468

Cited by 29 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is shown in the present paper that for large conductor sizes, where the proximity effect within the conductor is not negligible, this assumption does not hold true. Similar conclusions are made by Ferkal [10], who implemented an analytical approach: discrepancies up to 16% against methods neglecting the effect of the conductor when evaluating the screen losses are reported for a conductor of radius 22.56 mm.…”

Section: Iec ′supporting

confidence: 73%

See 1 more Smart Citation

Impact of Proximity Effects on Sheath Losses in Trefoil Cable Arrangements

Chatzipetros

Pilgrim

2020

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

Induced losses are a significant part of the total losses generated in HVAC cables. Presently, IEC 60287-1-1 is used to calculate the ratio of induced loss in a cable's metal sheath to its conductor loss (λ1), assuming uniform current density in both conductors and sheaths. Although this assumption is reasonable for smaller cables, it is questionable for larger cables in close proximity, such as three-core (3C) export cables in Offshore Wind Farm (OWF) projects. The effects of this non-uniform current density cannot be easily treated via a straightforward, purely analytical approach, since conductor currents are not effectively represented by linear ones in larger cables, while sheath currents are also unevenly distributed. The present study employs 2-D Finite Element (FE) models to evaluate how accurate the Standard method for calculating the λ1 factor is in cables with non-magnetic armor. Their validity is further enhanced by means of Filament Method. IEC 60287 appears to overestimate the temperature, particularly for larger conductor sizes, by up to 7°C (8%). Finally, suitable Reductive Factors are suggested which could improve the accuracy of the IEC method.

show abstract

Section: Iec ′supporting

confidence: 73%

“…λ1' plus λ1", derived from IEC, FEA and FM calculations. Both FE and FM models do not distinguish circulating and eddy losses, whereas IEC considers them separately, as shown in (10). Results are presented for lead sheaths, while the effect of sheath conductivity is also studied.…”

Section: B Solid Bonding (Sb) Lossesmentioning

confidence: 99%

Impact of Proximity Effects on Sheath Losses in Trefoil Cable Arrangements

Chatzipetros

Pilgrim

2020

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

show abstract

“…In addition to i 2 R losses, there are additional loss mechanisms that will affect cable ampacity [7,14,15,16]. These are:…”

Section: Induced Currents and Magnetic Fields In Layers Of DC Cablementioning

confidence: 98%

HVDC networks for offshore wind power: current ripple and cables

Wood

Macpherson

Smith

et al. 2012

10th IET International Conference on AC and DC Power Transmission (ACDC 2012)

View full text Add to dashboard Cite

Offshore wind power is attracting increasing levels of research and investment. The use of HVDC transmission and development of DC grids are topics with similar levels of interest that go hand in hand with the development of large scale, far from shore wind farms. In this paper, technical challenges resulting from the interaction between power electronic DC-DC converters and the cables in a DC transmission network are identified. Also the behaviour of a typical ripple current generated by such converters in a small DC network is simulated.

show abstract

“…Numerical methods have been developed for modeling cables, such as transmission line method (TL), finite element method (FEM), finite difference time domain (FDTD), partial element equivalent circuit method (PEEC), etc. Among these methods, the PEEC method, which transforms the EM problems into equivalent circuits, is a great alternative for cable simulation.…”

Section: Introductionmentioning

confidence: 99%

Proximity effect in transient analysis of radio base stations

Chen

2018

Int J Numerical Modelling

View full text Add to dashboard Cite

This paper presents an equivalent circuit model for calculating fast transient current distribution in radio base station system. The new model takes account of both skin and proximity effects in the simulation and achieves a fast computation by using an efficient discretization scheme. The obtained circuit is synthesized using a time domain solver, PSpice. The proposed method is validated experimentally and is applied to evaluate the lightning current in a practical radio base station. A practical system with a 20-m tower and 7 cables is analyzed. Various surge protective devices (SPD) are installed among cables in the simulation. Comparison among different configurations reveals that proximity effect will lead to uneven current distribution in cables. Outer-located cables will carry more currents than others which should be paid more attention.

show abstract

Proximity effect and eddy current losses in insulated cables

Cited by 29 publications

References 4 publications

Impact of Proximity Effects on Sheath Losses in Trefoil Cable Arrangements

Impact of Proximity Effects on Sheath Losses in Trefoil Cable Arrangements

HVDC networks for offshore wind power: current ripple and cables

Proximity effect in transient analysis of radio base stations

Contact Info

Product

Resources

About