An FDTD thin wire model for lossy wire structures with non-circular cross section

Binghao Li, Ya Ping Du, Mingli Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)


This paper presents an effective finite-difference time-domain (FDTD) thin-wire model for lossy wire structures with noncircular cross section in transient analysis. Unique correction factors of field quantities and surface electric field of wire structures are introduced in the model. These parameters are both frequency-dependent and position-variant. They are evaluated in an initialization process and are applied in the updating process using an iterative convolution technique. The proposed method is validated with the transmission line theory analytically and the traditional FDTD method numerically. Three types of wire structures are tested, including rectangular, H-shape, and cross-shape structures. Good agreements are observed. It is found that the computation time is reduced to 1% of that with the conventional FDTD method, and the computer memory to 30% in the tested case. General guidelines on wire zone meshing are provided as well. Finally, this method is applied to analyze lightning surges in a light rail system under a direct lightning stroke.

Original languageEnglish
Article number8359023
Pages (from-to)3055-3064
Number of pages10
JournalIEEE Transactions on Power Delivery
Issue number6
Publication statusPublished - 1 Dec 2018


  • Conductors
  • Finite difference methods
  • Finite-difference time-domain
  • frequency-dependent loss
  • Integrated circuit modeling
  • non-circular cross section
  • Numerical models
  • Surface impedance
  • thin wire model
  • Time-domain analysis
  • Wires

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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