In order to study the distribution of current circulation and potential of the train's body-axle end of the dual-system train in different power supply system sections,the chain circuit model of the train grounding system was established based on a dual-system train,and a united traction power supply calculation method was proposed for the vehicle-ground integration in alternating current(AC)and direct current(DC)sections.At the same time,the optimization model of train grounding protection resistance was established,and two configuration schemes of the train grounding system were analyzed.A dual-system rail transit line in China was studied for simulation verification.The research results show that compared with scheme 2,scheme 1 can reduce the maximum potential value of the train's body-axle end by 36.58％-41.04％and the maximum current circulation value by 18.49％-22.97％.In addition,scheme 1 sets the protection resistance at the first and last vehicles at 20 mΩ,which can achieve a maximum potential value of the train's body-axle end of 1.15 V and a maximum current circulation value of 50.30 A.It can reach the optimal effect of restraining the potential of the train's body-axle end.The united traction power supply calculation method for the vehicle-ground integration in AC and DC sections can be applied to grounding system analysis of power supply single-system or multiple-system trains.
关键词
双制式列车/联合牵引供电计算/列车接地系统/链式电路/车体环流
Key words
dual-system train/united traction power supply calculation/train grounding system/chain circuit/current circulation of train's body
维普
万方数据