| 有效接地系统中变电所的接地设计探讨 |
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| 引用本文： | 张卓为,王向平.有效接地系统中变电所的接地设计探讨[J].电力勘测设计,2010(6). |
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| 作者姓名： | 张卓为 王向平 |
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| 作者单位： | 浙江省电力设计院;华东电力设计院; |
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| 摘 要： | 110kV～500kV系统常采用有效接地系统,110kV及220kV系统中变压器中性点直接接地或经低阻抗接地,部分变压器中性点也可不接地;330kV及500kV系统中不允许变压器中性点不接地运行。文章对有效接地和低电阻接地系统中的变电所接地要求加以梳理,并结合工程实例对变电所的接地设计进行了分析探讨,结合国家电网公司"两型一化"变电站设计建设导则,提炼出变电所接地设计的主要考虑思路及解决方案。
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| 关 键 词： | 有效接地 直接接地 低阻抗接地 两型一化 二次系统 |
Exploration of Substation Earthing Design in Effective Earthing System |
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| ZHANG Zhuo-wei,WANG Xiang-ping.Exploration of Substation Earthing Design in Effective Earthing System[J].Electric Power Survey & Design,2010(6). |
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| Authors: | ZHANG Zhuo-wei WANG Xiang-ping |
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| Affiliation: | ZHANG Zhuo-wei,WANG Xiang-ping(1.Zhejiang Electric Power Design Institute,Hangzhou 310014,China,2.East China Electric Power Design Institute,Shanghai 200063,China) |
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| Abstract: | The effective earthing system has been popularly used in 110kV～500kV system,the neutral-point direct earthing or low-resistance earthing has been used for 110kV and 220kV transformers while no earthing for some of transformers is also available;the neutral-point no-earthing operation is not permitted for 330kV and 500kV transformers.This article try to clarify the related requirements for the substation earthing in effective erarthing and low-resistance earthing system by incorporating some exact project cases and the so-called "Two types and one mode" design guide for substation stipulated by State Grid,and figure out some thinking and solution methods. |
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| Keywords: | effective earthing direct earthing low-resistance earthing peak value sub-corner mesh potential two types and one mode current branching secondary system |
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