AC Interference of Electric Railway on Natural Gas Pipeline in Jiaxing and Protection

Digital multimeter was used to detect the AC interference of the Jiaxing section pipeline in detail. After adopting the drainage method of solid-state decoupler + grounded copper cable to set up 3 drains on the pipeline, the maximum AC potential was reduced from 31.81 V to below 4 V, and the draining effect reached the national standard requirements. This drainage technology could effectively solve the communication interference problem of the electric railway to the natural gas pipeline in the Jiaxing section, and ensure the safe operation of the pipeline.