文档摘要:双边供电方式能够实现长距离无分相贯通供电,与单边供电方式相比系统牵引回流特性有差异,进而将导致钢轨电位分布不同,故需对双边供电方式下的钢轨电位进行研究.基于双边供电复线牵引网模型,推导了系统钢轨电位及轨中电流计算过程,通过分析钢轨电位的影响因素提出双边供电复线牵引网钢轨电位的抑制措施.研究结果表明:单边供电与双边供电取流点附近的钢轨电位基本一致,但双边供电方式下会在牵引变电所处造成更低的钢轨电位.双边供电方式下,钢轨电位在机车取流处达到最大值,取流点两侧钢轨电位逐渐减小,当上下行机车位置关于相邻变电所区间中点对称时,该区间内钢轨电位分布几乎一致,机车越靠近相邻变电所区间中点钢轨电位越大,列车运行组织应尽量避免机车在靠近两相邻变电所区间中点会车.轨地过渡电阻3Ω?km增大到15Ω?km时,钢轨电位最大值从52.49V增大到109.01V,增幅为107.68%,可通过降阻达到钢轨电位抑制效果.土壤电阻率从10Ω?m增加到200Ω?m时,牵引变电所处的钢轨电位从10.82V增加到36.74V,增幅为239.56%.钢轨电位分析与治理需充分考虑线路周围土壤条件.增设贯通地线后,机车取流处钢轨电位迅速降低,抑制钢轨电位效果显著.
Abstract:Thebilateralpowersupplymethodcanrealizethelong-distanceandnon-phaseseparatedthroughpowersupply,ascomparedtotheunilateralpowersupplymethod.Thetractionreturncurrentcharacteristicsofthesystemaredifferent,whichcouldleadtodifferentrailpotentialdistribution;therefore,itisnecessarytostudytherailpotentialofthebilateralpowersupplymethod.Basedonthemodelofbilateralpowersupplymultiplextractionnetwork,thecalculationmethodofsystemrailpotentialandcurrentinrailwasderived,andthesuppressionmeasuresofrailpotentialinbilateralpowersupplymultiplextractionnetworkwereproposedbyanalyzingtheinfluencingfactorsofrailpotential.Theresultsofthestudyshowthattherailpotentialsnearthecurrentpickuppointoftheunilateralpowersupplyandthebilateralpowersupplyarebasicallythesame,butthebilateralpowersupplymethodwillcauselowerrailpotentialsatthetractionsubstation.Underthebilateralpowersupplymode,therailpotentialreachesthemaximumvalueatthelocomotivepickingupcurrent.Therailpotentialonbothsidesofthepickingupcurrentpointdecreasesgradually,andtherailpotentialdistributionisalmostthesamewhenlocomotivesontheuplineanddownlinearesymmetricallylocatedaboutthemidpointofthezoneofneighboringsubstations.Thecloserthelocomotiveistothemidpointofthezoneofneighboringsubstations,thelargertherailpotentialis.Thetrainoperationorganizationshouldtrytoavoidthelocomotivemeetingclosetothemid-pointoftwotractionsubstations.Themaximumvalueofrailpotentialisfrom52.49Vto109.01Vwhenrail-groundtransitionresistanceincreasesfrom3Ω?kmto15Ω?km,withanincreaseof107.68%,andtheeffectofrailpotentialinhibitioncanbeachievedthroughthereductionofresistance.Whenthesoilresistivityincreasesfrom10Ω?kmto200Ω?km,therailpotentialatthetractionsubstationincreasedfrom10.82Vto36.74V,anincreaseof239.56%,andtheanalysisandmanagementoftherailpotentialneedtotakethesoilconditionsintofullconsideration.Aftertheinstallationofadditionalthroughgroundline,therailpotentialatthelocomotivetakingtheflowisrapidlyreduced,whichisanobviouseffectoftheinstallationofadditionalthroughgroundlineinsuppressingtherailpotential.
作者:王克文 李卫兰 王辉 Author:WANGKewen LIWeilan WANGHui
作者单位:北京交通大学电气工程学院,北京100044;国家能源集团新朔铁路有限责任公司,内蒙古鄂尔多斯017099西南交通大学电气工程学院,四川成都611756西南交通大学电气工程学院,四川成都611756;成都尚华电气有限公司,四川成都610200
刊名:铁道科学与工程学报 ISTICPKU
Journal:JournalofRailwayScienceandEngineering
年,卷(期):2024, 21(6)
分类号:U223
关键词:双边供电 复线牵引网,钢轨电位 影响因素 抑制措施
Keywords:bilateralpowersupply multipletractionnetwork railpotential influencingfactors suppressionmeasures
机标分类号:TU528.01U226.8+1TM743
在线出版日期:2024年7月16日
基金项目:国家能源投资集团有限责任公司重大科技项目双边供电下的钢轨电位影响因素及抑制措施分析[
期刊论文] 铁道科学与工程学报--2024, 21(6)王克文 李卫兰 王辉双边供电方式能够实现长距离无分相贯通供电,与单边供电方式相比系统牵引回流特性有差异,进而将导致钢轨电位分布不同,故需对双边供电方式下的钢轨电位进行研究.基于双边供电复线牵引网模型,推导了系统钢轨电位及轨中电...参考文献和引证文献
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关键词:双边供电,复线牵引网,钢轨电位,影响因素,抑制措施,
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