To improve the energy-efficiency of transport systems, it is necessary to investigate electric trains with on-board hybrid energy storage devices (HESDs), which are applied to
In recent years, the energy storage devices have enough energy and power density to us Energy Saving Speed and Charge/Discharge Control of a Railway Vehicle with On‐board Energy Storage by Means of an Optimization Model - Miyatake - 2009 - IEEJ Transactions on Electrical and Electronic Engineering - Wiley Online Library
At present, on-board hybrid energy storage devices (HESDs) were utilized in some modern railway systems, which can supply traction energy and recover regenerative energy to improve the systems''
Solutions. onsemi ''s long-term expertise and leading role in renewable energy generation, power management, and energy conversion helps customers across the globe handle the challenges of Energy Storage Systems. We create
Thermo-chemical energy storage is based on chemical reactions with high energy involved in the process. The products of the reaction are separately stored, and the heat stored is retrieved when the reverse reaction takes place. Therefore, only reversible reactions can be used for thermo-chemical storage processes.
In this paper, a very simple model for representing a train equipped with a hybrid energy storage system is presented. The combination of regenerative braking with the energy
F(x) is the optimization objective function, which is composed of components f 1 (x) and f 2 (x), and Ω f is the feasible region. f 1 (x) represents the energy-saving effect of the ESS, which is composed of the total output energy of the traction substation and the energy change of the ESS; f 2 (x) represents the investment cost of
An inductor is an energy storage device that can be as simple as a single loop of wire or consist of many turns of wire wound around a core. Energy is stored in the form of a magnetic field in or around the inductor. Whenever current flows through a wire, it creates a magnetic field around the wire. By placing multiple turns of wire around a
Optimal Sizing of On-Board Energy Storage Devices for Electrified Railway Systems Chaoxian Wu, Shaofeng Lu*, Fei Xue, (MILP) model based on energy flow and the law of conservation of energy
Abstract. Energy storage has the potential to reduce the fuel consumption of ships by loading the engine (s) more efficiently. The exact effect of on-board energy storage depends on the ship functions, the configuration of the on-board power system and the energy management strategy. Previous research in this area consists of detailed
In this paper, a very simple model for representing a train equipped with a hybrid energy storage system is presented. The combination of regenerative braking
With the rapid progress in railway electrification and energy storage technologies, onboard energy storage devices (OESDs) have been widely utilized in modern railway systems to reduce energy consumption. This article aims to develop the optimal driving strategy of electric trains with three popular types of energy storage
Abstract. On-board energy storage devices (OESD) and energy-efficient train timetabling (EETT) are considered two effective ways to improve the usage rate of regenerative braking energy (RBE) of subway trains. EETT is less costly but has lower ceilings, whereas OESD, although expensive, maximizes the reuse of RBE.
2 Fig. 1. Schematic of the energy flow for a typical train with on-board ESD in the whole journey. The work is extended in [13] and the monotonicity assumption is avoided by the proposed distance
The storage devices featured 600 Wh and 180 kW of rated energy and power, with a total weight of 430 kg and consequent specific energy and power of 1.4 Wh/kg and 418 W/kg, respectively. Experimental tests on the catenary/EDLC hybrid units showed a modest 1.6% reduction in the peak power demand from the overhead wire during
This paper suggests a general algorithm for speed profile optimization of an electric train with an on-board energy storage device, during catenary-free operation on a given line section. The approach is based on discrete dynamic programming, where the train model and the objective function are based on equations of motion rather than electrical equations.
Abstract: The optimal operation of a rail vehicle with on-board energy storage device minimizing energy consumption in catenary free mode is discussed in this paper. The electric double layer capacitor (EDLC) is assumed as an energy storage device because of its high power density, long lifetime and quick charge/discharge.
1 Introduction In recent years, the energy storage devices have enough energy and power density to use in trains as on-board energy storage. The devices are for instance, a secondary battery and an Electric Double Layer Capacitor (EDLC). Above all, the EDLC has
Abstract: For improving the energy efficiency of railway systems, onboard energy storage devices (OESDs) have been applied to assist the traction and recover
profile optimization with on-board energy storage devices: A dynamic programming based approach," Computers Industrial Engineering, vol. 126, pp. 149 – 164, 2018.
In the past, regenerated electrical energy from braking trains was dissipated as heat through dumping resistors, resulting in energy waste and substation temperature rise issues [9,10]. However
The present study describes and analyses a set of quasi-static railway power systems models and simulations considering on-board and off-board energy
On-board energy storage devices (OESD) and energy-efficient train timetabling (EETT) are considered two effective ways to improve the usage rate of regenerative braking energy (RBE) of subway trains. EETT is less costly but has lower ceilings, whereas OESD, although expensive, maximizes the reuse of RBE.
When the electric multiple units (EMUs) encounter a power supply failure, it is urgent to formulate a reasonable emergency traction strategy, and rely on the on-board energy storage device to pull to the nearby station as soon as possible. During emergency propelling, the train''s maximum traction force is affected by the maximum power of the on
With the rapid development of energy storage devices (ESDs), this paper aims to develop an integrated optimization model to obtain the speed trajectory with the constraint of on
A Model-Based System Synthesis method is proposed to circumvent the MBSE limitations. • This method allows to design energy storage device according to complex requirements. • Number, size and technology of
One SC energy storage unit can reduce the annual major energy demand by 500 MWh (around 30%). Moreover, Steiner et al. [17] reported that the Bombardier tram, a light rail vehicle based on an
Low frequency oscillation (LFO) in the electric multiple units (EMUs)-traction network cascade system (ETNCS) can lead to traction blockade and abnormal operation. Using the Chinese CRH3 EMUs as an example, a new LFO suppressing method by applying the energy storage (ES) device on EMUs is proposed in this paper and the ES is
The optimization of the train speed trajectory and the traction power supply system (TPSS) with hybrid energy storage devices (HESDs) has significant potential to reduce electrical energy consumption (EEC). However, some existing studies have focused predominantly on optimizing these components independently and have ignored the goal
Aimed to increase usage of regenerative energy and stabilize voltage variation of traction supply grid, an energy-saving model with on-board energy storage
This article aims to develop the optimal driving strategy of electric trains with three popular types of energy storage devices, namely supercapacitors, flywheels,
3.2 Cycle efficiency Cycle efficiency, also known as round-trip efficiency, is the ratio of the output electrical energy to the input electrical energy as a percentage during a full charge/discharge cycle. Therefore, it is a key indicator of energy efficiency. According to [], the cycle efficiency of ESSes can be classified into three levels: very high efficiency
For improving the energy efficiency of railway systems, onboard energy storage devices (OESDs) have been applied to assist the traction and recover the regenerative energy. This article aims to address the optimal sizing problem of OESDs to minimize the catenary energy consumption for practical train operations. By employing a
2 Fig. 1. Schematic of the energy flow for a typical train with on-board ESD becoming popular. Hybrid system is a combination of different ESDs, such as battery and supercapacitors
The storage devices featured 600 Wh and 180 kW of rated energy and power, with a total weight of 430 kg and consequent specific energy and power of 1.4
This paper investigates the benefits of using the on-board energy storage devices (OESD) and wayside energy storage devices (WESD) in light rail transportation (metro and tram) systems. The
This paper investigates the benefits of using the on-board energy storage devices (OESD) and wayside energy storage lines. The tram system model input data has been pr esented in Appendix A
Optimal Sizing of On-Board Energy Storage Devices for Electrified Railway System. ified Railway SystemsChaoxian Wu, Shaofeng Lu*, Fei Xue, Lin Jiang and Minwu ChenAbstract—For improving the energy efficiency of railway sys-tems, on-board energy storage devices (O. SDs) have been applied to assist the traction and recover the
To improve the energy-efficiency of transport systems, it is necessary to investigate electric trains with on-board hybrid energy storage devices (HESDs), which are applied to assist the traction and recover the regenerative energy. In this paper, a time-based mixed
Energy-efficient train operation involves four types of control: maximal traction, cruising, coasting, and maximal braking. With the rapid development of energy storage devices (ESDs), this paper
This article proposes a novel two-step approach to concurrently optimize the train operation, timetable, and energy management strategy of the onboard energy storage device (OESD) to minimize the net energy consumption for a whole urban railway line. In Step 1, approximating functions representing the minimum net energy consumption of each
Batteries 2022, 8, 167 3 of 29 only set as fixed parameters, which reduced the applicability of the model to electrified rail systems. In addition to the important electrical parameters (SOC and