Field tests of square and double exponential pulses for transient resistivity measurements using Wenner arrays and hemispheres

被引：0

作者：

Chisholm, William A. ^{[1
]}

Petrache, Emanuel ^{[2
]}

Le Mauff, Camille ^{[3
]}

机构：

[1] Kinectr Univ Toronto, Toronto, ON, Canada

[2] Kinectrics, 800 Kipling Ave, Toronto, ON M8Z 6C4, Canada

[3] EPRI Europe DAC, Beech Hill Rd, Dublin D04 V2N9, Ireland

来源：

ELECTRIC POWER SYSTEMS RESEARCH | 2024年 / 233卷

关键词：

Grounding; Soil resistivity; Transient; Lightning; Test methods; Two layer soil; FREQUENCY-DEPENDENCE; PARAMETERS;

D O I：

10.1016/j.epsr.2024.110499

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Models of frequency -dependent soil resistivity p(f) suggest the dual concept of time -dependent resistivity p(t) that, for high resistivity soil, increases from 100 ns to 100 mu s, a range of time relevant for lightning backflashover performance calculations. Measurements of p(t) can be made by impressing impulse or step current and monitoring voltage rise. Time -dependent resistivity can be established with Wenner or Schlumberger probe arrays and also with oblique fall-of-potential measurements from buried hemispheres. Tests show that rectangular and double-exponential pulse currents both have value. Specialized evaluation using "Drained Net Charge" concepts may yield estimates of low-frequency resistivity p o .

引用

页数：9