Scheduled System Maintenance on May 29th, 2015:
IEEE Xplore will be upgraded between 11:00 AM and 10:00 PM EDT. During this time there may be intermittent impact on performance. We apologize for any inconvenience.
By Topic

Parametric Study on Unit Step Responses of Impulse Voltage Measuring Systems Based on FDTD Simulations

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
Oka, H. ; Dept. of Electr. Eng., Doshisha Univ., Kyoto, Japan ; Baba, Y. ; Ishii, M. ; Nagaoka, N.
more authors

Unit step responses (USRs) of a USR-measuring system recommended by the International Electrotechnical Commission have been computed using the finite-difference time-domain (FDTD) method for various conditions of grounding and shield ring. The USR measuring system subject to analysis has a resistor divider of height 3.3 m and resistance 9 kΩ. It follows from FDTD-computed results that USR parameters are not much influenced by either the laboratory-floor conductivity σ or its relative permittivity εr if σ is higher than or equal to 10 mS/m, and they are close to the USR parameters for σ = ∞. When σ is lower than about 0.1 mS/m, USR parameters are more influenced by σ and εr. Variations in the partial response time Tα, the experimental response time Tn, the settling time Ts, and the overshoot β , due to the differences of σ and εr, are 8 ns, 14 ns, 150 ns, and 50%, respectively. Even if the width of a horizontal metal sheet is extended from wg = 2 to 3 m, these variations are not much reduced. The extension of the width of a vertical metal sheet from wv = 1 to 2 m does not influence the USR parameters much, either. The installing height of a shield ring h influences the USR parameters: with decreasing h, Tα and Tn decrease while β and Ts increase. Note that the FDTD-computed USR for σ = 0.1 S/m and εr = 10 agrees well with the corresponding measured USR.

Published in:

Power Delivery, IEEE Transactions on  (Volume:28 ,  Issue: 1 )