Charge/discharge Control Of A Train
With On-board Energy Storage Devices
For Energy Minimization And Consideration
Of Catenary Free Operation
Author(s)
M. Miyatake, K. Matsuda & H. Haga
Abstract
The optimal operation of rail vehicle with on-board energy storage device minimizing
total energy consumption is discussed in this paper. Until now, not enough
research deals with the optimal control of the devices. The authors have developed
the mathematical model based on a general optimization technique. In our study,
the electric double layer capacitor (EDLC) is assumed as an energy storage
device, because of its high power density etc. The proposed method can determine
the optimal acceleration/deceleration and current commands at every sampling
point under fixed conditions of transfer time and distance. The authors have also
modified it for applying to catenary free operation. Using the proposed methods,
simulations were implemented in some cases. The trend of optimal solutions such
as values of control inputs and energy consumption is finally discussed.
Keywords: power management, on-board energy storage, optimization, energysaving
operation, supercapacitor, catenary free operation.
1 Introduction
Electrical regenerative braking has reduced total energy consumption in electric
railway systems. However, if the energy is not absorbed by another train, catenary
voltage rises and regenerative failure is occurred under DC power feeding system.
One of the way for absorbing regenerative energy is to use energy storage. Regenerative
energy is stored in the energy storage and reused in the next acceleration.
The energy storage decreases the loss of circuit resistance by compensating voltage
drop. It also prevents regenerative failure even if substations cannot absorb energy.
Energy saving effect as well as preventing regenerative failure is expected.
Keywords
power management, on-board energy storage, optimization, energysaving
operation, supercapacitor, catenary free operation.
Related Book
Other papers in this volume
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