Detection and Analysis of AC-DC Mixed Interference to Gas Pipeline

The interference effects of DC stray currents caused by subways, AC stray currents caused by high-voltage transmission lines and high-speed railways on Wuxi gas pipelines were analyzed and evaluated in detail. The results show that the domestic standard is too strict in the evaluation of DC interference, so the Australian AS 2832.1-2015 standard can be used for evaluation. It is not accurate using domestic and foreign relevant standards to evaluate AC/DC mixed interference. And pipeline practitioners need to do further study.