摘要
针对电力机车通过电分相时产生的过电压,造成机车车顶间隙、接触网绝缘、高压互感器被击穿,牵引变电所跳闸等现象,分析机车过分相时的暂态过程,建立机车过分相时的暂态等效电路,并利用PSCAD软件进行仿真。根据机车进入电分相时刻不同的初相角得出过电压数据,使用蒙特卡罗模拟对过电压进行求解。利用PSCAD软件建立仿真模型进行实验,提出了加装RC保护抑制过电压的方法。实验结果表明加装RC保护有效降低了过电压对车顶设备的威胁,保证了电气化铁路的安全运行。
With regard to the overvoltage generated during an electric locomotive passing through of a phase break,led to breakdown of discharging gap on roof of the locomotive,overhead contact system insulation and HV instrument transformer and tripping of the traction substation,on the basis of analyzing the transient process while the locomotive is passing through the phase break,establishing of the transient equivalent circuit for the locomotive passing through the phase break,and simulation by means of PSCAD software,the over-voltage calculation is made by means of Monte Carlo simulation with the over-voltage data measured as the locomotive is passing over the phase break in different initial phase angles.Experiment is made on the basis of simulation model established by PSCAD software,and the method for suppression of over-voltage by adding of RC device is raised.The experiment shows that adding of RC protection device is able to minimize threatens to the roof top equipment caused by over-voltage,and it will guarantee safety operation of electrified railways.
出处
《电气化铁道》
2017年第1期44-48,共5页
Electric Railway
