Protection of Alternating Current Interference to Cathodically Proteceded Pipelines under Power Transmission Lines

Power transmission lines can cause alternating current interference corrosion of buried pipelines when they share a “public corridor” with the pipelines.On basis of summarizing the practice of alternating current interference protection at home and abroad,the article points out that solid-state decoupler earthing is the most effective measures for reducing alternating current interference and resisting strong electric shock.Nevertheless,the risks of various drainage arrangements due to the lack of testing instruments and standards can not be neglected in practice.