| 杆塔地网接地电阻冲击特性的研究 |
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| 引用本文： | 熊军,陈俊武,陈智,杨敏,高骏.杆塔地网接地电阻冲击特性的研究[J].电瓷避雷器,2005(6):42-44. |
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| 作者姓名： | 熊军 陈俊武 陈智 杨敏 高骏 |
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| 作者单位： | 华中科技大学电气与电子工程学院,湖北,武汉,430074;河北电力研究院,河北,石家庄,050021 |
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| 摘 要： | 改善输电线路杆塔接地装置的冲击特性、降低冲击接地电阻是减少输电线路雷击事故,提高供电可靠性的有效方法。通过对模拟试验中最优化的电极进行冲击大电流试验,得出冲击系数α的大小与冲击电流幅值、电极形状和布置形式有关,不是一个定值;接地体在防雷保护中作用的大小主要取决于冲击接地阻抗和过渡过程的特征,而不是工频接地电阻。
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| 关 键 词： | 接地装置 冲击接地电阻 冲击系数 冲击大电流试验 |
| 文章编号： | 1003-8337(2005)06-0042-03 |
| 收稿时间： | 2005-09-25 |
| 修稿时间： | 2005年9月25日 |
Research on the Impulsive Characteristics of Grounding Resistance of Transmission-line Towers |
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| XIONG Jun,CHEN Jun-wu,CHEN Zhi,Yang Min,GAO Jun.Research on the Impulsive Characteristics of Grounding Resistance of Transmission-line Towers[J].Insulators and Surge Arresters,2005(6):42-44. |
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| Authors: | XIONG Jun CHEN Jun-wu CHEN Zhi Yang Min GAO Jun |
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| Affiliation: | 1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Hebei Electric Power Research Institute, Shijiazhuang 050021, China |
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| Abstract: | Improving the impulsive characteristics of grounding devices of transmission-line towers,reducing the impulsive ground resistance of towers is an efficient method to decrease lightning accidents of transmission-line towers and to heighten the reliability of power supply.1The heavy pulse current test results using the optimal grounding electrode obtained from the simulation experiment,suggest that the impulse coefficient α is not a fixed value which is related with the impulse current peak value,the type and arrangement of the electrodes.1The function of grounding devices against lightning mostly lies on the impulse grounding resistance and the characteristics of transition process and not on the power frequency grounding resistance. |
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| Keywords: | grounding devices impulse grounding resistance impulse coefficient heavy pulse current test |
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