±1100kV特高压直流接地极对埋地油气管道直流干扰实测与分析曹方圆1，李博2，董华清3，白锋1，安俊杰3，沈光霁2（1.中国电力科学研究院有限公司，北京100192；2.沈阳龙昌管道检测中心，沈阳110168；3.中石化川气东送天然气管道有限公司，武汉430000）摘要：直流接地极电流会对大范围的埋地油气管道造成腐蚀和危险影响，特别是±1100kV特高压直流接地极，额定入地电流大，影响程度更大，影响范围更广。为获得特高压直流接地极对埋地油气管道的影响水平和管道电压分布规律，文中首次在昌吉—古泉±1100kV特高压直流输电工程调试期间，对邻近的川气东送管道进行了全面的测试，得到了管道通/断电电位分布、泄漏电流密度、阀室引压管电压和土壤电位梯度。根据现有标准中管道直流干扰的各项评价指标对管道测试结果进行了分析，相关测试结果可为川气东送管道的安全运行维护提供数据支撑，也可为后续直流接地极选址和埋地油气管道路径选择提供参考。关键词：特高压直流；接地极；埋地油气管道；测试；电位分布MeasurementandAnalysisofDCInterferenceof±1100kVUHVDCGroundingElectrodetoBuriedOilandGasPipelineCAOFangyuan1，LIBo2，DONGHuaqing3，BAIFeng1，ANJunjie3，SHENGGuangji2（1.ChinaElectricPowerResearchInstitute，Beijing100192，China；2.ShenyangLongchangPipelineSurveyCenter，Shenyang110168，China；3.SinopecSichuan⁃EastNaturalGasTransmissionBranch，Wuhan430000，China）Abstract:CurrentofDCgroundingelectrodewillcausecorrosionanddangerouseffectsonalargerangeofburiedoilandgaspipelines，especiallythegroundingelectrodeof±1100kVUHVDCtransmissionprojecthaslargeratedgroundingcurrent，greaterdegreeofinfluenceandwiderrangeofinfluence.InordertoobtaintheinfluencelevelandthedistributionofpipelinevoltageofUHVDCgroundingelectrodeonburiedoilandgaspipeline，thecompre⁃hensivetestofthenearbygastransmissionpipelineofSichuan⁃EastisperformedforthefirsttimeduringthethecommissioningofChangji⁃Guquan±1100kVUHVDCtransmissionproject.Theon/offpotentialdistributionofthepipeline，leakagecurrentdensity，voltageoftheimpulsepipeinvalvechamberandsoilpotentialgradientareob⁃tained.AccordingtotheevaluationindexesofpipelineDCinterferenceinexistingstandards，thetestresultsofthepipeli...
