| 基于回流系统集中参数模型的地铁钢轨电位和杂散电流计算 |
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| 引用本文： | 李怀志.基于回流系统集中参数模型的地铁钢轨电位和杂散电流计算[J].现代城市轨道交通,2020(6):20-23. |
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| 作者姓名： | 李怀志 |
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| 作者单位： | 浙江纺织服装职业技术学院机电与轨道交通学院 |
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| 摘 要： | 地铁直流供电及回流系统中存在钢轨对地电位和杂散电流。钢轨对地电位对人身和设备存在直接安全隐患,杂散电流对地铁钢结构形成比较严重的电蚀。文章以具有OVPD装置的直流供电及回流系统为例,建立回流网集中参数电气模型,通过multisim软件仿真,计算钢轨对地电位和杂散电流,总结钢轨对地电位和杂散电流规律,为排流柜投入运行、OVPD保护电压设置等提供依据。
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| 关 键 词： | 地铁 回流系统 集中参数 钢轨电位 杂散电流 OVPD |
Calculation of rail potential and stray current based on parameter model of return system |
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| Li Huaizhi.Calculation of rail potential and stray current based on parameter model of return system[J].Modern Urban Transit,2020(6):20-23. |
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| Authors: | Li Huaizhi |
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| Abstract: | Rail to ground potential and stray current exist in the metro DC power supply and return system.Rail to ground potential has a direct safety hazard to human body and equipment,while stray current has a relatively serious electric erosion to the subway steel structure.Taking the DC power supply and return system with OVPD device as an example,this paper establishes the centralized parameter electrical model of return network,calculates the rail to ground potential and stray current through multisim software simulation,summarizes the rail to ground potential and stray current patterns,and provides the basis for the operation of the drain cabinet and the setting of OVPD protection voltage. |
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| Keywords: | metro return system centralized parameter rail potential stray current OVPD |
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