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

Haoyan Xue, Jean Mahseredjian, Jesus Morales, Ilhan Kocar, Alain Xemard

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)4582-4592
Number of pages11
JournalIEEE Transactions on Power Delivery
Volume37
Issue number6
DOIs
Publication statusPublished - 1 Dec 2022

Keywords

  • earth-return parameters
  • EMT-type software
  • Mixed transmission system
  • propagation constant
  • time domain study

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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