Ionisation gradient of low resistivity soils and liquids

2006 17th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2006-05-15 DOI:10.1109/EMCZUR.2006.214958

N. Nor

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引用次数: 4

Abstract

The effects of moisture contents in sand (from 1% to 10%), grain size (medium and fine), impulse polarity and Earth electrode's dimension (hemispherical and parallel-plate test cell) on the threshold electric field, Ec value, have been presented in a previous work (N. Mohamad Nor et al., 2005). In that study (N. Mohamad Nor et al., 2005), the Ec value is obtained when two current peaks were observed. However, no Ec value is obtained for low resistivity test media (resistive liquid medium, sand with large percentage of water content=15%, salt with different percentage of water content, and sand-salt soil mixtures (N. Mohamad Nor et al., 2005, 2001), since there was no second current peak was obtained in those test media. This paper is therefore to obtain the Ec value for these low resistivity test media. Using the available voltage and current traces from previous study (N. Mohamad Nor et al., 2001), for the first time the Ec is taken when v-i curve starts to form a loop. It was found that the Ec of low resistivity test media are within the range of Ec suggested in previous studies, which are from 1.3 kV/cm to 20 kV/cm

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低电阻率土壤和液体的电离梯度

在之前的工作中(N. Mohamad Nor et al.， 2005)已经提出了沙子中的水分含量(从1%到10%)、颗粒尺寸(中等和细粒)、脉冲极性和接地电极尺寸(半球形和平行板测试单元)对阈值电场(Ec值)的影响。在该研究中(N. Mohamad Nor et al.， 2005)， Ec值是在观察到两个电流峰值时获得的。而对于低电阻率试验介质(电阻性液体介质、含水率大=15%的砂、不同含水率的盐、砂盐混合土等)，由于没有二次电流峰值，因此没有得到Ec值(N. Mohamad Nor et al.， 2005, 2001)。因此，本文的目的是得到这些低电阻率测试介质的Ec值。利用先前研究的可用电压和电流迹线(N. Mohamad Nor et al.， 2001)，首次在v-i曲线开始形成环路时取Ec。研究发现，低阻试验介质的电导率在前人研究建议的电导率范围内，为1.3 kV/cm ~ 20kv /cm

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2006 17th International Zurich Symposium on Electromagnetic Compatibility

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