高压交流电缆穿越海滨浴场区域人员安全风险的评估  

Personnel Safety Risk Assessment in High Voltage AC Cable Passed Bathing Beach

作　　者：鲍彦锋 李津 宋琦 陈翔 陈乐 梁毅 杜艳霞 BAO Yanfeng;LI Jin;SONG Qi;CHEN Xiang;CHEN Le;LIANG Yi;DU Yanxia(China National Offshore Oil(China)Co.,Ltd.Tianjin Branch,Tianjin 300459,China;Corrosion and Protection Center,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459 [2]北京科技大学新材料技术研究院腐蚀与防护中心,北京100083

出　　处：《腐蚀与防护》2024年第5期56-63,共8页Corrosion & Protection

摘　　要：穿越海滨浴场的高压交流电缆会在浴场周围产生电磁场,使附近人员存在一定安全风险。基于已有标准提出跨步电压及电场强度两个评估高压交流电缆附近人员安全风险的指标;建立了某穿越海滨浴场高压交流电缆的电磁干扰模型,通过模型计算得到电缆在稳态运行工况和故障工况下(单相缆芯护套短接故障、单相缆芯接地故障)附近区域跨步电压及电场强度分布情况。结果表明:在电缆稳态运行和单相缆芯护套短接故障工况下,陆上和浴场涨落潮区域人员的安全风险均较低;在单相缆芯接地故障工况下,人员安全风险较高,在故障点两侧跨步电压呈对称分布,远离故障点10 m后电场强度降至安全标准(14 V/m);最后,基于评估结果,提出了增设防护围栏和敷设接地网等缓解措施。High voltage AC cables passing through bathing beach can generate electromagnetic fields around the beach,which poses a certain safety risk to nearby personnel.Based on the existing standards,two indexes of step voltage and electric field intensity were proposed to evaluate the safety risk of personnel near high voltage AC cables.An electromagnetic interference model of a high voltage AC cable passing through bathing beach was established.The distributions of step voltage and electric field intensity in the vicinity were calculated by the model,when the cable was in steady-state operation condition and fault condition(single-phase cable sheath shorting fault,single-phase cable core grounding fault).The results show that the safety risk of personnel on land and in the tidal area of bathing beach was low when the cable was in steady-state operation condition and in single-phase cable sheath shorting fault condition.Under the single-phase cable core grounding fault condition,the personnel safety risk was high,the distribution of step voltage on both sides of the fault point was symmetrical,and the electric field intensity decreased to the safety standard(14 V/m)after 10 m away from the fault point.Finally,based on the evaluation results,mitigation measures including adding protective fences and laying ground grids were proposed.

关 键 词：高压交流电缆 电磁干扰 模拟计算 跨步电压 电场强度 

分 类 号：TG174.4[金属学及工艺—金属表面处理]