AT牵引供电对电力电缆感应电压仿真分析

Simulation of AT Traction Power Supply System for Power Cable Induced Voltage

高速铁路电力贯通线一般采用全电缆敷设,牵引供电系统工作电流作用于电力电缆金属护层时将会产生感应电压。随着机车运营速度的提高,牵引供电系统工作电流的提高对电力电缆金属层感应电压是否会危及人员、设备的安全是亟需解决的问题。通过对牵引供电作用于电力电缆感应电压展开分析,将牵引供电系统和电力电缆利用统一链式网络模型对其整体建立仿真模型,仿真计算牵引供电系统工作电流不同情况下对电力电缆感应电压的情况,计算结果与理论分析较为吻合。计算数据表明,牵引供电系统工作电流的提高对电力电缆感应电压影响并不明显,仿真模型和仿真数据能够为铁路电力专业人员提供相关设计施工参考依据。

Power transmission lines of high speed railway usually adopt full cable laying, and the traction power supply system will generate induced voltage when the working current acts on the metal protective layer of power cable. With the increase of locomotive operating speed, it is urgent to improve the working current of traction power supply system when the induced voltage of metal layer of power cable may endanger the safety of personnel and equipment. In this paper, the influence of traction power supply on the induced voltage of power cable was analyzed. Besides, a simulation model combining the traction power supply system and power cable was established by using unified chain circuit model. Then, the induced voltage of power cable under different working currents of traction power supply system was simulated and calculated, and the calculation results were consistent with the theory. Research results show that the increase of working current of traction power supply system has little influence on the induced voltage of power cable, and the simulation model and data can provide railway electric power professionals with reference for design and construction.