电气化铁路高压电缆牵引网电气特性研究

Electrical characteristic of cable traction network for electrified railway

基于电缆牵引网的等效模型推导出短回路内的电流分布特性及电缆牵引网等效阻抗。基于京沪高铁实际线路数据及行车安排,建立高压电缆牵引供电系统模型,对补偿系数及系统(包括电力系统和主变压器)漏抗对电缆牵引网电容效应的影响进行了仿真,并对紧密运行工况下电缆牵引网的电压进行了校验。仿真结果表明,当主变电所的数目分别为3个、4个或5个时,紧密运行工况下牵引网最低电压均满足动车组正常运行电压要求。

The current distribution characteristic in short loop and the equivalent impedance of CTN（Cable Traction Network） are deduced based on its equivalent model. The model of HV cable traction power supply system is established based on the actual line data and train running arrangement of Beijing-Shanghai high-speed railway,the impact of compensation coefficient and system leakage reactance（including electric power system and main transformer） on the capacitance effect of CTN is simulated and the CTN voltage in heavy load condition is verified. The simulative results show that,when there are three,four or five main transformer substations,the minimum CTN voltage in heavy load condition can satisfy the requirement of normal railway operation.