Study On Optimization For Hybrid Train System Of On-board Energy Storage And Ground-based Charging Pile Layout

Due to the inconvenience of laying catenary for several tram's lines,hybrid tram equipped with on-board energy storage device comes into being.So rational design of on-board energy storage and ground-based charging pile layout for the hybrid tram traffic system draws more and more attention.By optimizing on-board energy storage and ground-based charging pile layout,the rational scale of hybrid train system can be determined and construction cost can be reduced.This thesis takes the hybrid train system as the research object and aims at achieving the minimum construction cost of this system.On tram operation scheme is given,the global optimization method of the hybrid train system is designed,on the basis of which,the software is developed.This software can provide fundamental platform for the design of on-board energy storage device and ground-based charging pile facilities.On analyzing the hybrid tram characteristics,the tram traction calculation model and on-board energy storage model as well as ground-based charging pile model are established.The division rules for operation intervals are designed and the influence that power supply mode has on ground-based charging pile layout is analyzed,then the optimization model is built on taking the minimum construction cost of hybrid train system as goal.For the part of on-board energy storage,dichotomy method is used for searching its minimum capacity on ground-based charging layout known;for the part of ground-based charging pile layout,traversal algorithm is employed to search its minimum cost on on-board energy storage known.Based on these two methods,a weight method is designed to optimize the coupling system of on-board energy storage and ground-based charging layout.MATLAB simulation platform is built for verifying the correctness of these optimization methods above..According to the overall software design plan,this thesis analyzes the software requirements,designs the software architecture and divides functional modules.The algorithm flows for train traction calculation module and on-board energy storage calculation module as well as hybrid train system optimization module are designed.The software for global optimization for hybrid tram system is developed in the VS2008 environment.Simulation is conducted by this software with the use of actual tram's line in order to analyze and verify the correctness and effectiveness.