Design Of Hybrid Traction Power Supply Of CRH2 EMU And Reliability Analysis

With the revolution in the power electronics industry,high speed railway industry is also upgraded to a very much high extent.After hybrid trams,now fast hybrid trains are future of traction industry.Neutral section is powerless section which needs to be placed carefully to avoid speed loss and unexpected accident.This paper presents a Hybrid Energy system(HES)based topology for Chinese fast Train CRH2 running on“LANXIN” track to pass through Neutral Section with HES based power to reduce chances of speed loss and introduce flexibility for engineers to design Neutral sections even on hilly areas.Speed profile analysis is done to estimate delay time for a train passing through Neutral Section.Due to presence of Gobi Desert harsh environmental conditions of track’s location are kept under consideration using METENORM software.Seven major cities are taken as reference to analyze weather-based data.METEONORM software has also helped to verify efficiency of latest MPPT methods(Particle Swarm Optimization(PSO)based hybrid PSO-P&O,PSO-Inc.Cond algorithms).HES contains Graphene based Supercapacitors,working in parallel with PV modules(embedded on rooftop of train).Three level NPC inverter-based topology with FOC-SVPWM motor control is utilized to efficiently control torque of traction motor.To analyze the reliability status,reliability model of the system is established with the help of reliability block diagram using handbook MIL-HDBK-217 F.The standard MIL-HDBK-217 F provides the methodology to find the failure rates of involved components in the system.Along with this Mean time to failure(MTTF)is calculated of designed system.Analysis and Reliability related studies is implemented on simulated system to assure the long life of system components before it is reached to failure.In this thesis proposed methodology proves with MATLAB simulation that HES topology can not only save time but also can make whole system more efficient by saving a small amount of time from every incoming train.The designed system can run the train without any speed loss through the Neutral Section.This designed system is a revolutionary step to make the future fast trains self-powered and reduce the carbon emission related issues.