| 垂直接地极的降阻性能研究 |
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| 引用本文： | 杨方圆,王森,李志忠,张波,曾嵘.垂直接地极的降阻性能研究[J].西北电力技术,2010(1):1-5. |
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| 作者姓名： | 杨方圆 王森 李志忠 张波 曾嵘 |
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| 作者单位： | 电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);陕西电力科学研究院; |
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| 摘 要： | 接地网是保证变电站安全的重要设施，垂直接地极是变电站降低接地电阻的常用措施之一。文章选取110kV、220kV、500kV和1000kV电压等级变电站中的典型接地网进行仿真研究。对于均匀土壤，从接地网面积、垂直接地极长度、根数3方面研究了垂直接地极的降阻效果，并引入了垂直接地极长度与接地网对角线长度的比值来描述不同面积接地网中垂直接地极的降阻效果；对于双层土壤，将接地网分为大面积和小面积两类，研究了反射系数和上层土壤厚度对垂直接地极降阻效果的影响。研究结果表明，长垂直接地极对于所在土壤存在下层低电阻率的接地系统尤其有效。
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| 关 键 词： | 垂直接地极 接地电阻 屏蔽作用 双层土壤反射系数 降阻率 |
Research on Vertical Grounding Rod Performance |
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| YANG Fang-yuan,WANG Sen,LI Zhi-zhong,ZHANG Bo,ZENG Rong ,Beijing ,China,.Shanxi Electric Power Research Institute,Xi\'an ,China.Research on Vertical Grounding Rod Performance[J].Northwest China Electric Power,2010(1):1-5. |
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| Authors: | YANG Fang-yuan WANG Sen LI Zhi-zhong ZHANG Bo ZENG Rong Beijing China Shanxi Electric Power Research Institute Xi\'an China |
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| Affiliation: | YANG Fang-yuan~1,WANG Sen~2,LI Zhi-zhong~2,ZHANG Bo~1,ZENG Rong~1 (1.State Key Laboratory of Power System , Power Equipment Control &Simulation,Tsinghua University (Department of Electrical Engineering),Beijing 100084,China,2.Shanxi Electric Power Research Institute,Xi\'an 710054,China) |
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| Abstract: | Grounding grid is an important facility to ensure substation safety.The vertical grounding rod is a common measure to reduce the grounding resistance.Typical grounding grids in 110 kV,220 kV,500 kV and 1000 kV substation are selected in the paper.For uniform soil,the vertical grounding rod's reduction in resistance is studied on grid area,the vertical grounding rod length and the number.The ratio of the vertical grounding rod length and grounding grid's diagonal length is proposed to represent a clear descr... |
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| Keywords: | vertical grounding rod grounding resistance shielding double-layer soil reflection coefficient resistance reducing rate |
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