Optimal Deployment Of Energy Storage Systems
In A DC-electrified Railway System
Author(s)
A. J. López-López, R. R. Pecharromán, J. A. García-Matos,
A. Fernández-Cardador & A. P. Cucala
Abstract
Energy Storage Systems (ESSs) represent one of the main vectors for improving
railway electrical systems. Former low reliability rates and life-time are being
dramatically improved in recent times due to the intensive research on battery
and capacitor technologies. However, little research has been conducted on the
optimization of railway system infrastructure by incorporating ESSs. This paper
presents a method for designing the best possible deployment of ESSs in a DCelectrified
mass rapid transport system line by means of optimization, selecting
number and location of ESSs. A detailed model of system load flow and energy
storage devices for a given traffic scenario in a general DC railway system has
been carried out, resulting in a MINLP optimisation model that minimises total
energy consumption. Then, a linearization of load flow equations has been
performed in order to get a fast-approximate solution of the system by
converting the MINLP problem into a MIP one. This optimization method has
been applied to a realistic railway system, yielding reasonable location and
number of ESSs in the system. The error due to the approximation has been
evaluated by comparing the results of the linear load flow against those of the
non-linear load flow. The method has demonstrated to be a powerful tool to
decide how many and where to place ESSs in a DC-electrified railway system.
Keywords: optimisation, energy storage systems, mass rapid transport systems.
Keywords
optimisation, energy storage systems, mass rapid transport systems
Related Book
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