基于高速列车取流特性的牵引变电所负荷电流预测及应用

Load Current Prediction and Application of Traction Substation Based on Current Flow Characteristics of High Speed Train

牵引变电所负荷电流过程对变压器容量设计、计费方式优化等具有重要意义。传统方法基于牵引供电计算仿真软件获得负荷过程,其计算过程十分复杂,而基于典型负荷曲线的替代方法也存在一定局限。提出基于列车的典型取流特性曲线并结合列车运行图,利用多列车电流叠加获得牵引变电所负荷电流过程的方法。分析影响列车取流特性的主要因素,提出采用加速满功率电流、恒速恒功率电流、加速持续时间、恒速持续时间来描述列车取流特性,基于实测数据,给出时速300km列车取流特性的典型参数。并基于该方法,阐述预测牵引变电所最大需量的应用案例。

The process of load current in traction substation is of great significance in designing the transformer capacity and optimizing the charging method.The traditional method is based on the process of the calculation simulation software of traction power supply to obtain load.The calculation process is very complicated,and the alternative method based on the typical load curve also has certain limitations.Based on the typical current flow characteristics curve of train and combined with the train operation diagram,the method of using multitrain current superposition to obtain the load current of traction substation is used.This paper analyzes the main factors influencing the characteristics of train current flow,and proposes to use the accelerating full-power current,constant-speed constant-power current,acceleration duration and constant-speed duration to describe the train current flow characteristics.Based on the measured data,the typical parameters of the current flow characteristics for a train at 300 km/h are provided.Based on the method,a case for predicting the maximum demand of the traction substation is described.