A study of transient induced voltages on a Maglev train coil system

Author

Ametani, A. ; Kato, R. ; Nishinaga, H. ; Okai, M.

Author_Institution

Doshisha Univ., Kyoto, Japan

Volume

10

Issue

3

fYear

1995

fDate

7/1/1995 12:00:00 AM

Firstpage

1657

Lastpage

1662

Abstract

The paper discusses transient induced voltages to the superconducting coil system of a magnetic levitation (Maglev) train planned in Japan from an overhead ground wire (GW) which protects the coil system from lightning strokes. A simplified lumped-circuit coil model is developed based on the two-port theory of an L equivalent circuit of a distributed-parameter line. Its impedances are evaluated from the impedance and admittance matrices of an overhead multiconductor system, which represents the coil, using the EMTP CABLE CONSTANTS. Calculated results of transient induced voltages by the proposed coil model agree satisfactorily with experimental results. It is made clear that the greater the grounding resistance and the smaller the separation between the coil and the GW and the span length of grounding, the greater the induced voltage

Keywords

earthing; electric admittance; electric impedance; lightning protection; lumped parameter networks; magnetic levitation; network analysis; power system protection; power system transients; superconducting coils; two-port networks; EMTP CABLE CONSTANTS; L equivalent circuit; Maglev train; admittance matrix; distributed-parameter line; grounding resistance; impedance matrix; lightning strokes; lumped-circuit coil model; overhead ground wire; overhead multiconductor system; span length; superconducting coil; transient induced voltages; two-port theory; Admittance; Equivalent circuits; Grounding; Impedance; Lightning; Magnetic levitation; Protection; Superconducting coils; Voltage; Wire;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.400953

Filename

400953