Ultracapacitor assisted regenerative braking in metropolitan railway systems

Killer, Albert; Armstorfer, Andreas; Díez, Andrés E.; Biechl, Helmuth

doi:10.1109/citss.2012.6336687

Cited by 21 publications

(23 citation statements)

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“…Concerning ultracapacitors, the main technology is based on electrochemical double layer capacitors. The main advantages of ultracapacitors, when compared with batteries is that ultracapacitors present a higher cycle life, in the order of hundreds of thousands of cycles; another relevant advantage is their capacity to capture energy peaks, due to their fast response [6], [16], [18], [19].…”

Section: Energy Storage Technologiesmentioning

confidence: 99%

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Optimal Sizing of Energy Storage for Regenerative Braking in Electric Railway Systems

Torre

Sanchez-Racero

Aguado

et al. 2015

IEEE Trans. Power Syst.

139

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The problem of optimally sizing hybrid energy storage systems (HESS) installed in electric railway systems, considering the effect of regenerative braking is studied in this paper. HESSs combine traditional batteries and newly developed ultracapacitors, taking advantage of the high energy capacity of batteries and of the flexibility and ability to capture high power density of ultracapacitors. A novel mixed integer linear programming formulation that includes the counting of battery cycles is presented. Some particularities of battery operation are included in the model, like the dependence of its performance on the number of cycles and the depth of discharge (DOD). Results are reported first for a illustrative case study, allowing us to perform sensitivity studies for several parameters; results are also reported and for a larger case, closely resembling the problem faced by railway energy systems planners and operators.Index Terms-Electric railway systems, hybrid energy storage sizing, mixed integer linear programming. NOMENCLATUREThis section describes the sets, parameters, and variables used in the paper. A. Sets Set of batteries.Time period set. AC/DC inverter set. DC/DC inverter set. B. ParametersMinimum battery unit (MBU) cost .Daily MBU cost for each battery .Minimum ultracapacitor unit (MUU) cost .

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Section: Energy Storage Technologiesmentioning

confidence: 99%

“…The use of regenerative braking is beginning to extend to many railway systems, especially in metro systems [15], [16]. Note that, given the much higher number of stops and the higher number of trains per hour, a metro system is able to profit very quickly from any investment made on the reuse of braking energy.…”

Section: Introductionmentioning

confidence: 98%

Optimal Sizing of Energy Storage for Regenerative Braking in Electric Railway Systems

Torre

Sanchez-Racero

Aguado

et al. 2015

IEEE Trans. Power Syst.

139

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“…Cuando se presenta la imposibilidad de retornar energía al sistema, por la ausencia de efecto de compensación, se considera que la red es no receptiva (Killer et al, 2012).…”

Section: Introductionunclassified

Simulación, Implementación y Pruebas de un Sistema de Compensación en Corriente Directa basado en Ultra Capacitores, para Sistemas Ferroviarios

Figueroa

Díez

Castrillón³

et al. 2017

Inf. tecnol.

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The application of compensation systems based on ultra-capacitors in the power system of the Metro in Medellin is studied. Compensation systems based on ultra-capacitors allow improving energy efficiency of railway systems, by reducing the dissipated energy as heat from the regenerative braking, while contributing at the same to stabilize the voltage. Consequently, the implementation of these systems brings benefits in terms of usage of infrastructure, allowing either line or fleet expansion with less investment. For the application, the feed system was evaluated to determine the requirements and potential benefits of implementing a compensator. Compensator design was done with simulation assistance using a digital model described in this work. Finally, the results of the real operation of the device are presented.

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“…The idea presented in [1] was to build a stationary storage unit made of ultra-capacitors that are connected to a DC bus through a bidirectional buck-boost DC-to-DC converter. The whole system would be able to store the excess of energy in the ultra-capacitor bank when the DC bus voltage rises as a consequence of a train braking, and to supply energy to the DC bus when trains are accelerating and drawing more energy from the DC bus.…”

Section: Introductionmentioning

confidence: 99%

“…The diode is use to avoid the flow of current from the ultra-capacitor to the armature, once the armature´s voltage becomes lower than the ultra-capacitor´s voltage. This way was possible to test the energy storage Then a small-scale prototype based on what was proposed in [1] was implemented. The device is going to be used to test control systems and to show the students the principles of DCto-DC converters, ultra-capacitors and regenerative braking.…”

Section: Introductionmentioning

confidence: 99%

Medium scale prototype of a regenerative braking system and voltage stabilizer

Villegas

Díez

Restrepo

et al. 2015

2015 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)

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This paper presents a medium scale prototype of a system to store the excess energy present in a DC electrical system, based on Ultra-capacitors and driven by a DC-to-DC converter. The prototype is first intended for research and pedagogic proposes, and second as a voltage stabilization system in Medellin's Metropolitan Train System where it is being implemented. This allows students and researchers to perform experiments regarding regenerative braking, power line compensation and high-current DC-DC electronics. It is based in previous work with simulations and a small prototype developed for the student in the Electrical and Electronics Laboratory in the Universidad Pontificia Bolivariana.

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Ultracapacitor assisted regenerative braking in metropolitan railway systems

Cited by 21 publications

References 1 publication

Optimal Sizing of Energy Storage for Regenerative Braking in Electric Railway Systems

Optimal Sizing of Energy Storage for Regenerative Braking in Electric Railway Systems

Simulación, Implementación y Pruebas de un Sistema de Compensación en Corriente Directa basado en Ultra Capacitores, para Sistemas Ferroviarios

Medium scale prototype of a regenerative braking system and voltage stabilizer

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