Simulation of Current Distribution in Parallel Single-Core Cables Based on Finite Element Method

Zheng, Li; Zhong, Xu; Jian, Xia; Bian, Rong; Xu, Shize; Cao, Jiong

doi:10.1109/imccc.2015.94

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Although overloading is of great importance, it is usually undetectable since the current transformer often monitors the total line current instead of the individual circuit current. The impacts of load current, loop distance, line segment length, grounding resistance, and grounding method on the current distribution have been extensively discussed [1,[5][6][7][8][9][10][11]. IEC 60287 presented a theoretical to predict the current distribution between parallel cables.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Methods for Suppressing Circulating Current in Metal Sheath of Cables Connected in Parallel

Zou

Yuan

et al. 2023

Energies

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The number of high-voltage parallel cables is rapidly increasing. The alternating magnetic field generated by the working current of power cable cores induces voltage in the adjacent metal sheath; if the sheath and earth form a circuit, the metal sheath will create a circulating current, resulting in a reduction in the load capacity of power cable and the life of cable insulation. This paper uses MATLAB to construct a model for calculating the circulating current of cables connected in parallel in the same phase, and the effects of cable arrangement, phase sequence, and loop distance of cables connected in parallel on the sheath circulating current are investigated. The induced voltage in power cable sheaths is decomposed into two components, i.e., the component resulting from the core current and the component resulting from the metal sheath. Two new sheath connection methods are proposed to suppress the sheath circulating current. Compared with traditional cross-connection grounding, the proposed methods can reduce the coupling degree between loops, thus decreasing the induced voltage and circulating current. The different grounding methods of the sheath are modeled in the environment of an electromagnetic transient program (EMTP), and the sheath circulating current is simulated and compared with the conventional cross-connection grounding method. In the asymmetric arrangement, the proposed series connection method can reduce the sheath circulating current by at least 50%; however, its increases the sheath circulating current in the symmetric arrangement.

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Section: Introductionmentioning

confidence: 99%

Comparison of Methods for Suppressing Circulating Current in Metal Sheath of Cables Connected in Parallel

Zou

Yuan

et al. 2023

Energies

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“…In these studies, three-phase, three and four-wire cable layouts were examined, and current imbalances of up to 119% were determined depending on the number of parallel cables per phase and cable layout. In addition, the temperature levels of cables in parallel cable systems [5], current distributions in cables in the case of loading with harmonic currents [6], phase sequence configurations for reducing magnetic fields in cable systems [7] and calculation of current distributions using finite element method [8] are investigated. In the studies carried out, it has been observed that the current imbalance between the conductors increase up to 263% depending on the number of parallel cables per phase and frequency, especially operating in harmonic current conditions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of cable and busbar system in multiconductor distribution systems in terms of current and magnetic field distributions

Demirol¹,

Çınar²,

Alboyacı³

2021

Turk J Elec Eng & Comp Sci

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The selection of power distribution components has great importance in electrical facilities. Cable and busbar systems are widely used applications, such as electric vehicle charge stations, microgrids and energy storage systems, for power distribution in the distribution grid. In this study, the current distribution on the parallel conductors and magnetic field distributions around cable and busbar structures are evaluated for studied application where the power distributed using a cable system between a converter transformer and a converter. All modeling and analysis studies are conducted using ANSYS Electronics Suite software, by applying balanced and pure sinusoidal current excitation. Obtained analysis results show that, when the busbar system is installed for power distribution, occurred current distribution between parallel conductors are decreased to the neglectable level and the calculated magnetic field density is about 73.7% lower than the cable system.

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“…For shielded cables, the influence of the arrangement method affects the power losses generated in the screen [7]. It is suggested that in order to obtain the lowest asymmetry coefficient, the cables should be arranged in an equilateral triangle [6,5]. If all of the above conditions are met the current will be evenly distributed in all of the cables (both in normal and fault conditions).…”

Section: Introductionmentioning

confidence: 99%

Calculation of minimal short-circuit current in parallel arrangement of cables for a three phase short-circuit fault

Książkiewicz¹,

Batura²

2019

ELECTROTECHNICAL REVIEW

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In commonly used short-circuit current calculation methodology, the acceptance of a short-circuit site in the middle of their length leads not only to a significant overestimation of short-circuit currents, but also does not guarantee the selective coordination of electrical apparatus and its proper protection function against electrical shock. The paper presents new approach to the problem of calculation short-circuit current in parallel cables. It is proven that the worst case scenario is highly influenced by the number of cables connected in parallel. Streszczenie. W powszechnie stosowanej metodologii obliczania prądu zwarciowego przyjmuje się,że miejsce zwarcia występuje wśrodku ich długości co prowadzi nie tylko do znacznego przeszacowania prądów zwarciowych, ale również nie gwarantuje selektywnej koordynacji aparatury elektrycznej i jej odpowiedniej ochrony przed porażeniem elektrycznym. W artykule przedstawiono nowe podejście do problemu obliczeniowego prądu zwarciowego w przewodach równoległych. Udowodniono,że w najgorszym przypadku duży wpływ ma liczba połączonych równolegle kabli. (Obliczanie minimalnego prądu zwarciowego w układzie równoległym kabli dla trójfazowego zwarcia)

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Simulation of Current Distribution in Parallel Single-Core Cables Based on Finite Element Method

Cited by 6 publications

References 7 publications

Comparison of Methods for Suppressing Circulating Current in Metal Sheath of Cables Connected in Parallel

Comparison of Methods for Suppressing Circulating Current in Metal Sheath of Cables Connected in Parallel

Evaluation of cable and busbar system in multiconductor distribution systems in terms of current and magnetic field distributions

Calculation of minimal short-circuit current in parallel arrangement of cables for a three phase short-circuit fault

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