平行双边供电系统电压损失分析与对策研究  

Research on Analysis of Voltage Loss of Parallel Bilateral Power Supply System and Countermeasures

作　　者：李鑫 刘炯 陈偲 马海木呷 朱长青 邓磊 LI Xin;LIU Jiong;CHEN Cai;MA Haimuga;ZHU Changqing;DENG Lei(Southwest Electric Power Design Institute Co.,Ltd,China Power Engineering Consulting Group Co.,Ltd,Chengdu 610056,China)

机构地区：[1]中国电力工程顾问集团西南电力设计院有限公司,成都610056

出　　处：《电力系统及其自动化学报》2022年第11期92-99,共8页Proceedings of the CSU-EPSA

摘　　要：电气化铁路采用双边供电方式可以取消牵引网供电臂末端的电分相,但双边供电后牵引负荷电流分布规律改变,因此有必要进一步深入研究双边供电系统的供电能力。根据平行双边供电系统电路拓扑特点,首先理论推导了多工况时牵引所分流系数、牵引网电压损失公式,并结合实例分别探究了分流系数和牵引网电压损失与相位差和机车位置之间的关系。其次,提出了一种适合电压移相器的控制算法。最后,搭建了双边供电系统仿真模型,分析了单车工况下两牵引所的分流系数和牵引网电压损失。结果表明:使用上述控制算法,电压移相器可以有效的调节馈线电压相位,降低负载不平衡度,并有效减小了牵引网上的电压损失。The use of bilateral power supply in electrified railways can eliminate the electrical phase separation at the end of the power supply arm of a traction network.However,the current distribution law for traction load will change after a bilateral power supply.Therefore,it is necessary to further study the power supply capacity of the bilateral power supply system.Based on the characteristics of the circuit topology of a parallel bilateral power supply system,the formulas for the shunt coefficients of traction substations and the voltage loss of the traction network under multiple operating conditions are theoretically derived at first,and examples are combined to explore the relationships among the shunt coefficient,voltage loss,phase difference and locomotive position.Then,a control algorithm suitable for a voltage phase shifter is proposed.Finally,a simulation model of bilateral power supply system is built to analyze the shunt coefficients of two traction substations and the voltage loss of the traction network under single-locomotive conditions.Results show that by using the proposed control algorithm,the voltage phase shifter can effectively adjust the feeder voltage phase,reduce the load imbalance,and effectively reduce the voltage loss of the traction network.

关 键 词：电气化铁路 双边供电 分流系数 电压损失 电压移相器 

分 类 号：TM92[电气工程—电力电子与电力传动]