摘要
利用Matlab/Simulink对现有的3种AT供电模式牵引网进行仿真,模拟正常负载和短路故障的情况,得到不同供电模式下贯通地线电流的变化。再带入磁耦合计算模型,得到信号电缆的感应电动势。仿真结果表明:感应电动势均未超过规定值,但新模式下故障时信号电缆的感应电动势达到90 V,该值偏大,需加设防护装置。
The through earthing wire current variations under different power supply modes have been obtained after simulation of existed 3 types of AT power supply modes made by application of Matlab/Simulink, under circumstances of normal load and short circuit load; and the inductive electromotive force of the signal cable is also obtained after input of magnetic coupling calculation model, the simulation results show that： all inductive electromotive forces are not beyond the rated values, however, the electromotive force of signal cable has reached 90 V when it is faulty under new mode, the value is relatively high, and protection devices are required to be set.
出处
《电气化铁道》
2016年第4期47-50,共4页
Electric Railway
关键词
信号电缆
磁影响
AT供电模式
贯通地线
感应电动势
Signal cable
magnetic effect
AT power supply mode
through earthing wire
inductive electromotive force
