Generalized Formulation and Surge Analysis on Overhead Lines: Impedance/Admittance of A Multi-Layer Earth

Xue, Haoyan; Mahseredjian, Jean; Ametani, Akihiro; Morales-Rodriguez, Jesus; Koçar, Ilhan

doi:10.1109/tpwrd.2021.3049595

Cited by 12 publications

(5 citation statements)

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“…The accurate earth-return impedance formula of a submarine cable which is buried in the seabed is derived based on references [15], [24]. It has the following expressions.…”

Section: A Series Impedance Of Submarine Cable 1) Derivation Of Accur...mentioning

confidence: 99%

“…It is clear that (3) involves the complicated Sommerfeld integral which represents multiple reflections and refractions of electromagnetic waves at the boundaries of different mediums. Following an approach similar to [15], [18], an EHEM can be developed to avoid the complexities in (3). Based on (1) and ( 3), the newly proposed EHEM for submarine cable buried in the seabed has the following expression.…”

Section: ) Derivation Of Ehem For Submarine Cablementioning

confidence: 99%

“…Furthermore, the overhead lines 1 and 2 and underground cable are modelled by extended TL [10]- [15]. The submarine cable is considered using EF, LCD and EHEM methods for case C2.…”

Section: Input Impedance For Mixed Transmission Systemmentioning

confidence: 99%

“…An exact formula (EF) of earth-return impedance for submarine cable considering air, seawater and seabed mediums is proposed. Based on the EF expression, a new equivalent homogeneous earth method (EHEM) is developed for submarine cable using an approach similar to [15], [18]. The EHEM has simplified expressions in comparison to EF method.…”

Section: Introductionmentioning

confidence: 99%

“…The results evaluated by EF and EHEM are compared with the new Line / Cable Data calculation method in EMTP [16], [19], hereinafter abbreviated as LCD. This new method is based on the Method of Moments -Surface Operator (MoM-SO) [20], [21] and includes both series and shunt per-unit-length parameters [10], [11], [15].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

An Investigation of Electromagnetic Transients for a Mixed Transmission System With Overhead Lines and Buried Cables

Xue¹,

Mahseredjian

Rodriguez³

et al. 2022

IEEE Trans. Power Delivery

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An electromagnetic transient study has been performed based on a practical 500 kV mixed transmission system. The system has overhead lines, submarine cables and underground cables. An exact expression of earth-return impedance for submarine cable has been developed. A new equivalent homogeneous earth method (EHEM) is also proposed based on the exact formula. The influences of air, seawater, seabed, wired armor structure and multi-layer seabed on series impedance and modal propagation constants of submarine cable are investigated. A novel modeling procedure on parametrical side of mixed transmission system is proposed in this paper. Moreover, the input sequence impedances of mixed transmission system are studied based on traditional Line / Cable Constant routines and the new method. Transient simulations are also performed using classical and new methods. The results are further validated with recently proposed MoM-SO technique.

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“…The accurate earth-return impedance formula of a submarine cable which is buried in the seabed is derived based on references [15], [24]. It has the following expressions.…”

Section: A Series Impedance Of Submarine Cable 1) Derivation Of Accur...mentioning

confidence: 99%

Section: ) Derivation Of Ehem For Submarine Cablementioning

confidence: 99%

“…Furthermore, the overhead lines 1 and 2 and underground cable are modelled by extended TL [10]- [15]. The submarine cable is considered using EF, LCD and EHEM methods for case C2.…”

Section: Input Impedance For Mixed Transmission Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%