Induced voltage on an overhead line due to nearby lightning

Author

Diendorfer, Gerhard

Author_Institution

Dept. of Electr. Eng., Florida Univ., Gainesville, FL, USA

Volume

32

Issue

4

fYear

1990

fDate

11/1/1990 12:00:00 AM

Firstpage

292

Lastpage

299

Abstract

Voltage waveshapes induced on an overhead line by nearby lightning return strokes are calculated numerically by solving the transmission-line equations using the time-domain approach of A.K. Agrawal et al. (1980) and a finite-difference technique. The traveling current source (TCS) model is used to calculate the return-stroke vertical and horizontal-electric fields (which are the sources for a line voltage) above a perfectly conducting ground plane. The effect of the striking-point distances and the return-stroke current waveshape on the induced voltages are illustrated. The exact location of the maximum voltage along the line depends not only on the closest distance from the striking point to the line but also on lightning-current parameters. In the case of a 2000-m-long line and a striking point a distance of 100 m from the line center, almost 90% of the induced voltage at the line terminations is due to the horizontal electric field coupling

Keywords

difference equations; electric fields; electromagnetic induction; lightning; overvoltage; power overhead lines; surges; transmission line theory; 100 m; 2000 m; finite-difference technique; horizontal electric field coupling; horizontal-electric fields; induced voltages; lightning return strokes; line terminations; line voltage; overhead line; perfectly conducting ground plane; return-stroke current waveshape; striking-point distances; time-domain approach; transmission-line equations; travelling current source model; vertical electric fields; Conductivity; Couplings; Electromagnetic fields; Equations; Finite difference methods; Lightning; Power system modeling; Power system transients; Surges; Voltage;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.59889

Filename

59889