控制电缆屏蔽层接地方式的抗干扰分析  

Anti-interference analysis for the grounding methods of control cable shielding line

作　　者：陶蓉[1] 李景禄[1] 林冶[2] 李超[1] 何娜[1] 李志娟[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410076 [2]福建省电力有限公司,福建福州350003

出　　处：《电力科学与技术学报》2007年第4期72-75,共4页Journal of Electric Power Science And Technology

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.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.

关 键 词：控制电缆 地电位干扰 屏蔽层 接地方式 

分 类 号：TM757[电气工程—电力系统及自动化]