适用于高原铁路的新型电缆牵引供电系统电气特性研究

Research on the Electrical Characteristics of a Novel Cable Traction Power Supply System Suitable for Plateau Railway

介绍了一种新型电缆牵引供电系统技术方案,可有效减少电网接入点,并提高供电能力、取消电分相环节,为高原电气化铁路高效安全运行提供重要技术支撑。研究了供电系统的结构,计算了线路参数,结合理论计算和仿真模型分析了电缆供电系统电气特性及对节点电压和功率的影响。最后依据配电网无功补偿原则和标准限值,提出了一种混合式无功补偿方案,并通过仿真验证了补偿方案的正确性,为工程设计人员提供了参考依据。

A new technical scheme of cable traction power supply system is introduced,which can effectively reduce the power grid access point,improve the power supply capacity,cancel the power separation link,and provide important technical support for the efficient and safe operation of plateau electrified railway.The structure of the power supply system is studied,the line parameters are calculated,and the electrical characteristics of the cable power supply system and the influence on the node voltage and power are analyzed by combining theoretical calculations and simulation models.Finally,according to the principle of reactive power compensation and standard limit of distribution network,a hybrid reactive power compensation scheme is proposed.The correctness of the compensation scheme is verified by simulation,which provides a reference for engineering designers.