Research On Energy-saving Technology Of High-speed Train Traction System

With the rapid development of Chinese high-speed train,the economical efficiency intelligent are two important directions of China high speed train.Every aspect of the running trains needs to be improved in order to realize the energy saving,consumption reduction and high efficiency running mode.There is also improvement request for ATO and intelligent operation strategy of running trains.Traction consumption is the main part of a whole consumption of a high-speed train,it is important and significant for high efficiency and economic running of high-speed train by improving the energy-saving and consumption reduction technology.In this thesis,the energy-saving optimization technology of traction transmission system is studied from two aspects of high-speed train operation and adhesion utilization.First,basic theory of high-speed train and main sub-system introduction are introduced in the thesis.In this section,following contents are included,force analysis of traction system,hardware configuration scheme of rectifier unit and inverter in main circuit of asynchronous traction motor,t he parameter calculation and type selection of main electrical components,the requirements of high-speed train traction characteristics provide power conversion basis for energy-saving optimization of traction transmission system.Second,analyze the affect factors for running consumption of high-speed trains,establish energy consumption model.setup the load observer in view of the fact that the occupancy rate of trains varies greatly and the quality of trains varies greatly in different regions and time periods,and design an optimized operation strategy by considering the different load level.Under the premise of ensuring the safe and punctual operation of the train,the differential evolution algorithm is used to optimize the energy-saving speed curve of the stable operation section of the train.Implement the simulation for the high-speed lines between two train stations,and verifying the effectiveness of the algorithm.Last,analyze the adhesion characteristics of high-speed train and the factors influencing the available adhesion coefficient,considering the adhesion coefficient difference between different conditions,set up low adhesion strategy when staring up.Establish a method to detect the slip and idle and design a optimal strategy of adhesion control based on fuzzy theory in order to shorten the recovery time back to adhesion state conditions.Implement the simulation and verifying the effectiveness of the algorithm.