An On-board Battery Condition Monitoring Based Medium-speed Maglev Vehicle Operation Control Strategy

Due to the short curve radius and great hillclimbing ability,maglev transportation has become the development direction of the transportation industry today.There are differences in terms of operation modes and routes between the medium-speed maglev at a speed of 200km/h and other speed grades of maglev transportation,the existing maglev operation control strategies cannot meet the requirements of the medium-speed maglev for safe operation.On-board battery is one of the important energy storage devices,for when the speed of maglev train is less than 100 km/h,the power to systems of levitation,guidance,brake,vehicle operation control and other systems are provided by the on-board battery.The current Vehicle Operation Control System(VCS)does not take on-board battery condition into consideration,once the battery fails,VCS cannot control the train safely and effectively.Therefore,it is of great significance to monitor the real-time state of on-board battery and to study the vehicle operation control strategies of medium-speed maglev based on on-board battery condition monitoring.In this thesis,firstly,the feature of VCS in medium-speed maglev transportation was analyzed,the dynamic model of medium-speed maglev was studied and the influence of on-board battery to train operation control was discussed.Secondly,the characteristics of the battery and its monitoring parameters were analyzed,a design method of the state monitoring sensor network was given,and the calculation method of battery remaining capacity was improved based on the monitoring condition of the battery.Then the operation control method of the maglev train was analyzed,and the operation control strategies based on battery monitoring state used in station and between stations was studied.Finally,the vehicle operation control strategies were verified by simulation.The main innovations of this thesis are:(1)The classified maglev train resistances were studied in this thesis,and a more fitted dynamic model of medium-speed maglev train was calculated.(2)Based on the resistances during the operation of the maglev train and the consumption power when the train runs at low speed,the energy consumption data of the train at different operation states were obtained.For the medium-speed maglev train running on different positions of a maglev line,the vehicle operation control strategy of the battery under different condition was given.