| 控制电缆屏蔽层接地方式的抗干扰分析 |
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| 作者单位： | 长沙理工大学电气与信息工程学院 湖南长沙410076(陶蓉，李景禄，李超，何娜，李志娟)，福建省电力有限公司 福建福州350003(林冶) |
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| 摘 要： | 国内外对于控制电缆屏蔽层应一端接地还是两端接地仍存在很大的争议.从分析地电位升高的危害和控制电缆屏蔽层接地的作用入手,通过比较不同接地方式下引起地电位干扰的2种地网电流对控制电缆的感应电压的大小,得出两端接地时的干扰电压比一端接地时要小.因此控制电缆应采用屏蔽层两端接地的方式.
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| 关 键 词： | 控制电缆 地电位干扰 屏蔽层 接地方式 |
Anti-interference analysis for the grounding methods of control cable shielding line |
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| Authors: | TAO Rong LI Jing-lu LIN Ye LI Chao HE Na LI Zhi-juan |
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| Affiliation: | TAO Rong1,LI Jing-lu1,LIN Ye2,LI Chao1,HE Na1,LI Zhi-juan1 |
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| Abstract: | The selection of control cable shielding line grounding method with one terminal or both terminals is a disputed problem.The paper analyzes the damage of high earth potential and the function of control cable shielding lines.Comparing the power grid current induced voltages in the control cables caused by one terminal grounding and that caused by both terminals grounding,it is found that the grounding method with both terminals has lower interference voltage than that with one terminal.Ii is suggested that the control cable should take both terminals grounding mode. |
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| Keywords: | control cable earth potential interference shielding line grounding method |
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