基于源网荷统一链式电路的交流电气化铁路动态潮流计算  

Dynamic Power Flow Calculation of AC Electrified Railway Based on Source-grid-load Unified Chain Circuit

作　　者：王辉[1] 刘炜[1] 李群湛[1] 马庆安[1] 刘童童 WANG Hui;LIU Wei;LI Qunzhan;MA Qing'an;LIU Tongtong(School of Electric Engineering,Southwest Jiaotong University,Chengdu 611756,Sichuan Province,China)

机构地区：[1]西南交通大学电气工程学院,四川省成都市611756

出　　处：《中国电机工程学报》2022年第11期3936-3952,共17页Proceedings of the CSEE

基　　金：国家自然科学基金青年科学基金(51607148);中国国家铁路集团有限公司科技研究开发计划(SY2020G001)。

摘　　要：为了实现交流电气化铁路列车供电系统仿真一体化,并考虑公共连接点处多负荷的相互影响,将列车供电系统分为电源层、电网层和负荷层。通过建立输电线、馈线和牵引网的链式电路模型及各接口之间的转换关系模型,构建列车供电系统源网荷统一链式电路通用模型。基于该模型进行列车供电系统动态潮流计算,分别建立采用电流源和功率源迭代模型求解的基本型模型。为了降低计算机仿真耗时,在基本型模型的基础上,提出相应的改进型模型及求解方法。以某电气化铁路线路为例,分别对不同求解方法的计算精度、迭代收敛次数、计算机仿真耗时和模型应用场景等进行仿真分析。结果表明基本型和改进型计算精度一致,但改进型仿真耗时更少;进行源网荷潮流计算具有必要性,尤其电网薄弱地区,同时表明功率源迭代模型较电流源迭代模型应用场景更广。In order to realize the integration of simulation of the train power supply system of alternating current(AC)electrified railway,and considering the mutual influence of multiple loads at the point of common coupling,the train power supply system was divided into source layer,grid layer and load layer.By establishing the chain circuit model of transmission line,feeder and traction network,and the conversion relationship model between the interfaces,a general model of the source-grid-load unified chain circuit of the train power supply system was constructed.Based on this model,the dynamic power flow calculation of the train power supply system was carried out,and the basic models that use current source and power source iterative models were established respectively.In order to reduce the time-consuming of computer simulation,on the basis of the basic model,a correspondingly improved model and solution method were proposed.Taking an electrified railway line as an example,the calculation accuracy of different solution methods,iteration convergence times,consumption of computer simulation time and model application scenarios were simulated and analyzed.The results show that the accuracy of the basic model is the same as that of the improved model,but the time consumption of the improved model is less;it is necessary to calculate the load flow of the source network,especially in the weak areas of the power grid;,and the application scenarios of the power source iterative model are wider than that of the current source iterative model.

关 键 词：电气化铁路 牵引供电 链式电路 源网荷 动态潮流计算 

分 类 号：TM922[电气工程—电力电子与电力传动] U223[交通运输工程—道路与铁道工程]