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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/18472

Title: Series impedance of distribution cables with sector-shaped conductors
Authors: Urquhart, Andrew J.
Thomson, Murray
Issue Date: 2015
Publisher: © IET
Citation: URQUHART, A.J. and THOMSON, M., 2015. Series impedance of distribution cables with sector-shaped conductors. IET Generation, Transmission & Distribution, 9(16), pp.2679-2685.
Abstract: Models of power distribution networks require accurate cable impedance data. For unbalanced networks, both the self-impedances and the mutual impedances are needed. However, published studies use differing approaches to determine cable impedances, leaving uncertainty over the level of detail required. This paper compares impedances provided by the manufacturer with those from several analytical methods, showing the impact of modelling the non-circular geometry and of including corrections allowing for the AC resistance. The analysis is compared to results from a freely available finite element solver where the current distribution is modelled in detail, taking account of eddy currents and the rotation of the cores relative to the neutral due to the cable lay. At 50 Hz, the analytical methods provide a good approximation but the finite element results show that eddy currents affect the impedance at harmonic frequencies. The results also show the impact of including the ground path in the impedance calculation. The current distribution in the ground has a wide cross-sectional area, suggesting that the assumption of a perfect multi-grounded neutral is inappropriate for LV networks with short cable lengths.
Description: This paper was published as Open Access (CC BY 3.0) in the journal IET Generation, Transmission and Distribution.
The dataset is at: https://dspace.lboro.ac.uk/2134/15544
Sponsor: This work was supported by the Engineering and Physical Sciences Research Council (EPSRC), UK (EP/I031707/1 and voucher 11220756) and by E.ON Technologies (Ratcliffe) Limited, UK.
Version: Published
DOI: 10.1049/iet-gtd.2015.0546
URI: https://dspace.lboro.ac.uk/2134/18472
Publisher Link: http://dx.doi.org/10.1049/iet-gtd.2015.0546
ISBN: 1751-8687
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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