交流电气化铁路牵引电缆供电分析

为了实现交流电气化铁路牵引电缆供电,采用双芯电缆电磁感应原理和Carson原理,研究了电缆与接触线分流系数,分析了电缆的波阻抗和自然功率,并将电缆牵引供电的能力与自耦变压器供电进行比较.结果表明:当电缆截面积大于240 mm2时,电缆分担电流是接触线的3倍以上,表明电缆供电能力是自耦变压器供电能力的1.13~1.34倍.仿真结果表明,当供电臂延长至100 km时,线路电压质量仍能得到保证. 

Power Supply Capacity of Traction Cable for AC Electrified Railway

In order to achieve traction power supply for AC electrified railways, the electromagnetic induction principle of two-conductor cables and Carson's theory were used to study the shunt coefficient between cable and catenary. The wave impedance and natural power of the cable were analyzed, and the power supply capacity of the cable traction system was compared with that of the autotransformer (AT) power supply system. The results show that when the cross section area is larger than 240 mm2, the current carried in cable is over 3 times more than that in catenary, implying that the power supply ability of the cable traction system is 1.13 to 1.34 times that of AT traction power supply system. Simulation reveals that when the length of the feeding section is extended to 100 km, the voltage quality of traction network can still be guaranteed.