Numerical electromagnetic analysis of impulse voltage measuring systems

Author

Ishii, Masaru ; Liao, Wenwei

Author_Institution

Tokyo Univ., Japan

Volume

14

Issue

4

fYear

1999

fDate

10/1/1999 12:00:00 AM

Firstpage

1228

Lastpage

1233

Abstract

The unit step response (USR) of lightning impulse voltage measuring systems is numerically calculated with the help of the Numerical Electromagnetic Code (NEC-2), which calculates the three-dimensional electromagnetic field around conducting wires. The accuracy of this analysis is proved satisfactory through comparison of the results of measurement with calculation. The advantage of this method is that the influence of the geometry of the circuit can automatically be calculated without evaluating stray capacitance in the system. Therefore, this method of analysis can be applied to the development of an impulse voltage divider, or in analyzing the influence of elements of a USR measuring circuit. The influence of the shield ring attached to a resistance divider, and of the vertical metal sheet in the IEC-recommended USR measuring circuit on the USR waveform is analyzed as an example

Keywords

electromagnetic fields; high-voltage techniques; impulse testing; lightning; numerical analysis; power system measurement; power system transients; voltage measurement; NEC-2; USR measuring circuit; conducting wire 3D EM field calculation; impulse voltage divider; lightning impulse voltage measuring systems; numerical electromagnetic analysis; shield ring; unit step response; vertical metal sheet; Capacitance; Circuits; Electrical resistance measurement; Electromagnetic analysis; Electromagnetic fields; Electromagnetic measurements; Geometry; Lightning; Voltage measurement; Wires;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.796211

Filename

796211