Multiconductor cell analysis of skin effect in Milliken type cables

Benato, Roberto; Paolucci, Antonio

doi:10.1016/j.epsr.2012.04.006

Cited by 27 publications

(12 citation statements)

References 10 publications

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“… EHV overhead lines with any number of earth wires [1];  Milliken conductors [2];  Harmonic behaviour of high voltage direct current (HVDC) cables [3];  Distribution line carrier (DLC) in medium voltage (MV) network [4];  Alternating current (AC) gas Insulated transmission Lines (GILs) [5];  AC high-speed railway supply [6].…”

Section: Introductionmentioning

confidence: 99%

Ground Return Current Behaviour in High Voltage Alternating Current Insulated Cables

et al. 2014

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Abstract:The knowledge of ground return current in fault occurrence plays a key role in the dimensioning of the earthing grid of substations and of cable sealing end compounds, in the computation of rise of earth potential at substation sites and in electromagnetic interference (EMI) on neighbouring parallel metallic conductors (pipes, handrails, etc.). Moreover, the ground return current evaluation is also important in steady-state regime since this stray current can be responsible for EMI and also for alternating current (AC) corrosion. In fault situations and under some assumptions, the ground return current value at a substation site can be computed by means of k-factors. The paper shows that these simplified and approximated approaches have a lot of limitations and only multiconductor analysis can show the ground return current behaviour along the cable (not only the two end values) both in steady-state regime and in short circuit occurrence (e.g., phase-to-ground and phase-to-phase-to-ground). Multiconductor cell analysis (MCA) considers the cable system in its real asymmetry without simplified and approximated hypotheses. The sensitivity of ground return current on circuit parameters (cross-bonding box resistances, substation earthing resistances, soil resistivity) is presented in the paper. OPEN ACCESSEnergies 2014, 7 8117

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Section: Introductionmentioning

confidence: 99%

Ground Return Current Behaviour in High Voltage Alternating Current Insulated Cables

et al. 2014

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“…6 has a stranded Al conductor. Typically, for sections larger than 1200 mm 2 of copper and 1600 mm 2 of aluminium, the conductor has a segmented design which is commonly known as Milliken conductor [23,24]. Moreover, in order to achieve very high ampacity levels some special solutions can be used [25].…”

Section: Transmission Cable System Descriptionmentioning

confidence: 99%

High voltage AC underground cable systems for power transmission – A review of the Danish experience, part 1

Bak

Silva

2016

Electric Power Systems Research

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“…It has been applied successfully to the analysis of a great number of asymmetrical/multiconductor systems from overhead lines with one or more ground wires to single-core ac and dc cables with screens and armour, gas insulated lines, and distribution line carriers. Papers [7][8][9][10][11][12][13] give some suggestions to deepen such applications, and [14] deals with the validation of the MCA method by exploiting the comparison with experimental measurements. MCA is based on the subdivision of the system into n elementary cells: the model type for the computation of elementary cell impedances can be chosen between Carson theory [15,16], Carson-Clem simplified formulae [17] or Schelkunoff/Wedepohl [18,19] formulae: at power frequency, all the formulations give the same results.…”

Section: Introductionmentioning

confidence: 99%

Sequence Impedances of Land Single-Core Insulated Cables: Direct Formulae and Multiconductor Cell Analyses Compared with Measurements

et al. 2020

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The paper deals with the sequence impedances (positive/negative and zero sequences) of high-and extra-high-voltage land single-core insulated cables. In particular, it presents the comparisons between sequence impedance measurements and computations. The computations of the sequence impedances are carried out by means of the most important international normative and council references (IEC/Cigré) and of multiconductor cell analysis which is a consolidated and powerful tool developed by University of Padova in order to analyse power frequency regimes of multiconductor asymmetric power systems. The comparisons are presented with reference to four high-and extra-high voltage insulated cables, even if the available ones are much higher: however, the conclusions derived from these four reference cases are general and can be useful for transmission system operators and for power electric system engineers involved in insulated cables. The paper demonstrates, for the first time in technical literature, that direct formulae cannot correctly evaluate the sequence impedances of installed single-core land cable systems. Extensive on-field measurement campaigns have served to this purpose.

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Multiconductor cell analysis of skin effect in Milliken type cables

Cited by 27 publications

References 10 publications

Ground Return Current Behaviour in High Voltage Alternating Current Insulated Cables

Ground Return Current Behaviour in High Voltage Alternating Current Insulated Cables

High voltage AC underground cable systems for power transmission – A review of the Danish experience, part 1

Sequence Impedances of Land Single-Core Insulated Cables: Direct Formulae and Multiconductor Cell Analyses Compared with Measurements

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