Generalized Formulation of Earth-Return Impedance/Admittance and Surge Analysis on Underground Cables

Xue, Haoyan; Ametani, Akihiro; Mahseredjian, Jean; Koçar, Ilhan

doi:10.1109/tpwrd.2018.2796089

Cited by 48 publications

(17 citation statements)

References 28 publications

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“…With respect to the homogeneous earth model in Fig. 2(a), Xue et al [21] have recently proposed the following formula for the ground-return impedance:…”

Section: ) Xue Et Almentioning

confidence: 99%

“…As concerns the ground-return admittance matrix Y 2 , it can be computed through inversion of the potential matrix P 2 , as Y 2 = jω(P 2 ) −1 [21], [27]. Xue et al proposed the following expression for the ground-return potential coefficients:…”

Section: ) Xue Et Almentioning

confidence: 99%

“…Recent contributions on the subject of homogeneous earth were given in [21], where Xue et al proposed a generalized formulation based on a complete field solution. The theory was used by Salvador et al [22] to provide a closed-form formula for the ground-return admittance that can be easily used in ATP/EMTP-like simulators.…”

Section: Introductionmentioning

confidence: 99%

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Ground-Return Parameters of Submarine Cables Buried in the Seabed

Lorenzo

Stracqualursi

Marzinotto

et al. 2023

IEEE Trans. Electromagn. Compat.

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The computation of sea/seabed-return distributed parameters of subsea cables is a relevant topic due to the growing importance of submarine connections. This article presents for the first time new formulas for the computation of self and mutual ground impedances and admittances for submarine cables buried in the seabed. The original theory developed by Sunde is applied to a three-media model with air, sea, and seabed. Referring to the practical installation practice of the Italian transmission system operator Terna S.p.A., we compare the prediction of the available models and assess the effect of the different approximations on the computation of the per unit length ground parameters. Finally, we define the limits of applicability of the available models that differ in accuracy and complexity.

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“…With respect to the homogeneous earth model in Fig. 2(a), Xue et al [21] have recently proposed the following formula for the ground-return impedance:…”

Section: ) Xue Et Almentioning

confidence: 99%

Section: ) Xue Et Almentioning

confidence: 99%

See 1 more Smart Citation

Ground-Return Parameters of Submarine Cables Buried in the Seabed

Lorenzo

Stracqualursi

Marzinotto

et al. 2023

IEEE Trans. Electromagn. Compat.

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“…For observing asymmetry, we are in particular interested in the two-fold degenerate modes, indicated with index v = 1,2. The eigenvectors x v and eigenvalues λ v can be obtained from: (10) where λ 0 and x 0,v are the degenerate eigenvalue and eigenvectors for the symmetric cable; δλ v and δx v are the first order corrections. The summation in Equation ( 10) involves the selection of the linear combination of the degenerate eigenvectors to which the modes would converge when removing the asymmetry.…”

Section: Modal Analysis Of Asymmetric Cablesmentioning

confidence: 99%

“…An analytical approach was established for symmetric cables to calculate the per-unit-length series impedance and shunt capacitance in [5,6]. The method has been developed by later researchers in different aspects, for example incorporating semi-conductive layer [7,8] and improving the ground return impedance calculation [9,10]. In [11], Patel pointed out that formulas based on [5] and [6] include skin effect but neglect proximity effect, which underestimates cable losses at the operating frequency and affects the transient waveforms for closely packed cables.…”

Section: Introductionmentioning

confidence: 99%

Core asymmetry influence on transmission line parameters of three‐core power cables

Wouters

Wagenaars

et al. 2021

IET Science Measure & Tech

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Time-domain reflectometry applied for power cable diagnostics employs transmission line parameters to determine signal shape and delay. This paper proposes to utilize pulse reflection measurement to evaluate the symmetry of a three-core power cable as part of production quality assessment. For a rotation-symmetric three-core power cable, transmission line parameters can be obtained analytically, and with modal analysis propagation channels can be decoupled. Asymmetry caused by inaccurate core positioning complicates the decoupling process. This paper utilizes the "field-circuit" approach for the analysis. The finite element method is used to obtain the electromagnetic field distribution for two types of asymmetry introduced in a cable design. Modal analysis results are validated by considering asymmetry as a perturbation of the symmetric cable design. The influence of asymmetry on the time-domain pulse response is simulated. Deviation from a symmetric configuration is observable, in particular in terms of propagation velocity, which can be employed to assess cable manufacturing accuracy.

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