基于双向可变电阻模块的杂散电流与轨道电位动态模拟系统
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摘要
现代城市轨道交通中,杂散电流与轨道电位带来的安全问题日益凸显,上述问题的防治措施在现场验证协调难度大,因此杂散电流与轨道电位模拟系统受到广泛关注。现有模拟系统缺乏对列车运行工况和牵引变电站接地方式的考虑,应用范围受限。为此,提出一种双向可变电阻模块,用以模拟列车的不同运行工况;在此基础上,结合牵引变电站接地方式,进一步提出了三种动态模拟系统,详细研究了其应用场合、演化规律、参数选择和控制策略。仿真和实验结果表明三种模拟系统不仅可用于研究杂散电流与轨道电位的动态分布规律,还可对相应的防治措施开展实验评估,因此具有良好的应用前景。
With the rapid development of urban rail transit,the safety problems caused by stray current and rail potential are increasingly serious.However,the stray current and rail potential solutions are difficult to verify in actual metro system.In recent years,the corresponding simulation systems have been extensively studied by researchers around the world.But the existing simulation systems lack the consideration of the train operation conditions and grounding schemes.Therefore,the applications of the simulation systems are limited.For these reasons,a novel bidirectional variable resistance module is firstly proposed to simulate the train movement under different operation conditions.Then three new dynamic simulation systems are further proposed in combination with the grounding schemes of the traction substation.The application scenarios,evolution laws,parameter selection and control strategies are analyzed in detail.The simulation and experimental results show that the above mentioned simulation systems can be employed not only to analyze the effects of stray current and rail potential,but also to hardware evaluations.It shows good application prospect in urban rail transit study.
With the rapid development of urban rail transit,the safety problems caused by stray current and rail potential are increasingly serious.However,the stray current and rail potential solutions are difficult to verify in actual metro system.In recent years,the corresponding simulation systems have been extensively studied by researchers around the world.But the existing simulation systems lack the consideration of the train operation conditions and grounding schemes.Therefore,the applications of the simulation systems are limited.For these reasons,a novel bidirectional variable resistance module is firstly proposed to simulate the train movement under different operation conditions.Then three new dynamic simulation systems are further proposed in combination with the grounding schemes of the traction substation.The application scenarios,evolution laws,parameter selection and control strategies are analyzed in detail.The simulation and experimental results show that the above mentioned simulation systems can be employed not only to analyze the effects of stray current and rail potential,but also to hardware evaluations.It shows good application prospect in urban rail transit study.
引文
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[15]Wang Miao,Yang Xiaofeng,Wang Lulu,et al.Resonant switched capacitor converter based DC autotransformer for urban rail transit[C]//IEEE Applied Power Electronics Conference and Exposition(APEC)San Antonio,TX,2018:1441-1446.
[2]杜贵府,张栋梁,王崇林,等.直流牵引供电系统电流跨区间传输对钢轨电位影响[J].电工技术学报,2016,31(11):129-139.Du Guifu,Zhang Dongliang,Wang Chonglin,et al Effect of traction current transmission among power sections on rail potential in DC mass transit system[J],Transactions of China Electrotechnical Society,2016,31(11):129-139.
[3]Lee C H,Lu C J.Assessment of grounding schemes on rail potential and stray currents in a DC transit system[J].IEEE Transactions on Power Delivery,2006,21(4):1941-1947.
[4]Tzeng Y S,Lee C H.Analysis of rail potential and stray currents in a direct-current transit system[J].IEEETransactions on Power Delivery,2010,25(3):1516-1525.
[5]Dolara A,Foiadelli F,Leva S.Stray current effects mitigation in subway tunnels[J].IEEE Transactions on Power Delivery,2012,27(4):2304-2311.
[6]Xu Shaoyi,Li Wei,Wang Yuqiao.Effects of vehicle running mode on rail potential and stray current in DC mass transit systems[J].IEEETransactions on Vehicular Technology,2013,62(8):3569-3580.
[7]Zaboli A,Vahidi B,Yousefi S,et al.Evaluation and control of stray current in DC-electrified railway systems[J].IEEE Transactions on Vehicular Technology,2017,66(2):974-980.
[8]Charalambous C A,Aylott P,Buxton D.Stray current calculation and monitoring in dc mass-transit systems:interpreting calculations for real-life conditions and determining appropriate safety margins[J].IEEE Vehicular Technology Magazine,2016,11(2):24-31.
[9]Charalambous C A,Aylott P.Dynamic stray current evaluations on cut-and-cover sections of DC metro systems[J].IEEE Transactions on Vehicular Technology,2014,63(8):3530-3538.
[10]Charalambous C A.Comprehensive modeling to allow informed calculation of DC traction systems’stray current levels[J].IEEE Transactions on Vehicular Technology,2017,66(11):9667-9677.
[11]Charalambous C A,Cotton I,Aylott P.Asimulation tool to predict the impact of soil topologies on coupling between a light rail system and buried third-party infrastructure[J].IEEETransactions on Vehicular Technology,2008,57(3):1404-1416.
[12]Cotton I,Charalambous C,Aylott P,et al.Stray current control in DC mass transit systems[J].IEEETransactions on Vehicular Technology,2005,54(2):722-730.
[13]Ibrahem A,Elrayyah A,Sozer Y,et al.DC railway system emulator for stray current and touch voltage prediction[J].IEEE Transactions on Industry Applications,2017,53(1):439-446.
[14]郑琼林,杨晓峰,游小杰.城市轨道交通直流自耦变压器牵引供电系统[J].都市快轨交通,2016,29(3):91-97.Zheng Trillion Q,Yang Xiaofeng,You Xiaojie.DCauto-transformer based traction power supply system for urban rail transit[J].Urban Rapid Rail Transit,2016,29(3):91-97.
[15]Wang Miao,Yang Xiaofeng,Wang Lulu,et al.Resonant switched capacitor converter based DC autotransformer for urban rail transit[C]//IEEE Applied Power Electronics Conference and Exposition(APEC)San Antonio,TX,2018:1441-1446.