64http://dlkc.cbpt.cnki.net电力勘测设计第4期DOI：10.13500/j.dlkcsj.issn1671-9913.2023.04.012500kV交流海底电缆接地方式优化研究李健，岳浩，吴庆华，吴高波，罗楚军(中国电力工程顾问集团中南电力设计院有限公司，湖北武汉430071)摘要：500kV交流海底电缆通常在线路两端将金属护套及铠装并联后直接接地，此时在护套及铠装上会产生相当大的环流和损耗，进而导致陆上段载流量受限，成为整个海缆线路的输送容量瓶颈。海缆接地方式的选择直接关系着海缆外护层过电压水平、电缆环流水平及电缆输送容量。以南方主网与海南电网第二回联网海底电缆结构型式为例，对锚固点及终端处的接地方式进行优化，即在两侧锚固装置处直接接地，海缆线路两侧终端处经护层电压限制器接地，在满足登陆段外护层感应电压及过电压要求的情况下，提高海底电缆载流量。关键词：海底电缆；载流量；接地方式中图分类号：TM726文献标志码：A文章编号：1671-9913(2023)04-64-04StudyonOptimizationofGroundingMethodof500kVACSubmarineCableLIJian,YUEHao,WUQinghua,WUGaobo,LUOChujun(CentralSouthernChinaElectricPowerDesignInstituteCo.,Ltd.ofChinaPowerEngineeringConsultingGroup,Wuhan430071,China)Abstract:The500kVACsubmarinecableisusuallygroundeddirectlyafterthemetalsheathandarmorareconnectedinparallelatbothendsoftheline,whichwillgenerateconsiderablecirculatingcurrentandlossinthesheathandarmor,leadingtotherestrictionofcurrentratingofthelandsectionandthusresultinginthebottleneckofthetransmissioncapacityofthewholesubmarinecableline.Thechoiceofsubmarinecablegroundingmethodisdirectlyrelatedtothemetalsheathovervoltagelevel,cablecirculationcurrentlevelandcabletransmissioncapacity.ThispapertakesthesouthernmainnetworkandHainanpowergridsecondnetworksubmarinecablestructuretypeasanexample,optimizesthegroundingmethodattheanchoragepointandterminal,thatis,directgroundingatbothsidesoftheanchoragedevice,bothsidesofthesubmarinecablelineterminalgroundedbysheathvoltagelimiter.Undertheconditionofmeetingtherequirementsofinducedvoltageandovervoltageoflandingsection,thesubmarinecableloadcapacitycanbeincreased.Keywords:submarinecable;currentrating;groundingmethod*收稿日期：2021-05-11第一作者简介...
