高压输电线路对埋地钢管的干扰与预防

The Disturbance to Buried Steel Pipe Caused by High Voltage Transmission Pipeline and Its Preventive Measures

高压输电线路上交流电产生的电磁场会对邻近钢质管道产生干扰,在设计和施工阶段,及时发现并采取预防措施,可以大大减少交流干扰导致的安全风险。施工过程中电塔下的管条及时接地,可消除容性耦合导致交流干扰的风险;改造电塔接地体并增埋绝缘板,可消除阻性耦合导致电弧击穿的风险;预先采取排流措施,可消除感性耦合导致交流腐蚀的风险。

The electro magnetic field which is produced by AC in the high voltage transmission pipeline can disturb the steel pipeline in the vicinity, we can reduce this safety risk greatly if we can find it and take preventive measures in the design and construction phase. For example, the ground connection of the strip under the pylon in time can erase the risk of AC disturbance caused by capacitive coupling; the method of improving grounding body of pylon and laying additional insulating board can avoid the risk of arcing over caused by resistive coupling; and the drainage measures in advance can prevent the risk of AC etching caused by inductive coupling as well.