川渝管道受高压直流干扰下排流效果规律研究与应用

Research and Application on the Drainage Effect of Sichuan Chongqing Pipeline Underhigh Voltage DC Interference

为了掌握高压直流干扰防护措施的有效性,通过CDEGS计算软件,依托于某接地极实际设计情况建模,分析了管道受高压直流接地极干扰影响时锌带排流与强制排流两种防护方式的特点及缓解规律,分析结果表明:(1)单一的锌带排流不能充分缓解干扰,有效缓解距离与铺设锌带长度呈正相关关系;(2)强制排流的缓解效果明显,但远端的位置反而会增加干扰风险;(3)强制排流及锌带排流的联合防护方式能有效抑制干扰影响;(4)针对长距离管道,建议先采用强制排流进行长距离干扰抑制,再局部铺设锌带进行辅助排流。

In order to understand the effectiveness of high-voltage direct current interference protection measures,CDEGS calculation software was used to model the actual design of a certain grounding electrode.The characteristics and mitigation laws of zinc strip discharge and forced discharge protection methods for pipelines affected by high-voltage direct current grounding electrode interference were analyzed,The analysis results indicate that:(1)A single zinc strip discharge cannot fully alleviate interference,and the effective relief distance is positively correlated with the length of the zinc strip laid;(2)The relief effect of forced drainage is significant,but the remote location actually increases the risk of interference;(3)The combined protection method of forced discharge and zinc strip discharge can effectively suppress interference effects;(4)For long-distance pipelines,it is recommended to first use forced drainage for long-distance interference suppression,and then locally lay zinc strips for auxiliary drainage.