Research On Traction Calculation And Energy-saving Application Of High-speed Maglev Train

As a new type of transportation,the high-speed maglev train with the advantages of fast speed,safety and comfort has become a new development direction of rail transportation in the "post-high-speed rail era".However,with the increase of speed,the energy consumption from train operation has increased significantly,and it is closely related to the configuration of power supply system and train operation mode.Therefore,combined with the structure of high-speed maglev train traction power supply system,this paper establishes a traction calculation model for high-speed maglev train and builds a simulation system on this basis,realizes the simulation of train operation to study the energy-saving of high-speed maglev train.Firstly,based on the theory of traction calculation,this paper analyzes the stress on the train during operation and builds a multi-particle train kinematics model;based on the theory of synchronous motor,derives the mathematical model from the rotating synchronous motor to the long stator linear synchronous motor,and calculates both the terminal voltage of stator section and the terminal voltage and current of the output transformer / converter,then builds the model of high-speed maglev train traction power supply system;combined with the power supply characteristics of high-speed maglev train,the traction force and impact rate of the following trains with both two-step change method and three-step change method are analyzed and calculated respectively,based on this,builds the calculation model of train step change.Secondly,through the study of the above models,the whole high-speed maglev train traction calculation model is built.With the help of Matlab simulation software,builds a traction calculation simulation system for high-speed maglev train,and the functional modules of the system are analyzed and designed.Combined with system parameters and proposed data,the operation simulation of the high-speed maglev train is completed,through this simulation system can get the data such as train running speed,traction force,and transformer / converter output voltage,current,power factor,etc.Finally,by using the traction calculation simulation system built in this paper and combined with the operating characteristics of high-speed maglev train,searches for the optimal cruising speed and idle point position of the train by genetic algorithm,gets the train energy-saving operation curve based on four-stage manipulation strategy,and outputs data of train speed curve and energy consumption through high-speed maglev train traction calculation simulation system,the comparative analysis of the energy consumption of the train before and after optimization shows that the energy saving effect reaches 11.38%,which verifies the effectiveness of the energy-saving method.