This article aims to address the optimal sizing problem of OESDs to minimize the catenary energy consumption for practical train operations by employing a mixed-integer linear
energy diagrams of the electric transport operation have been analyzed, and the main stages of the rational selection of onboard energy storage capacity have been determined. A schematic
Some research projects on the application of the energy storage devices to railway systems have been reported in [1–6]. Most of them discussed reasonable circuit configuration and sizing of
Some of the power devices of the traction inverter of AC motors can be used to set up the charger circuit for charging the energy storage system in EV drive trains. The circuit
The onboard energy storage system (ESS) is highly subject to the fuel economy and all-electric range (AER) of EVs. In the voltage multiplier, a circuit with diodes and capacitors is used to balance the cells. 94 The circuit, however,
In addition to sustainable energy sources, efficient energy storage systems are needed. Amongst others high performance batteries and supercapacitors were developed to
these drives, e.g., diesel with additional, heat recovery systems and energy storage sys-tem (ESS) on all new vessels as well as vessels currently undergoing modernisation [3,11,12]. The
Traction Circuit with Onboard Energy Storage System Fig.1 shows a traction circuit configuration of overhead catenary line and ESD hybrid rail vehicle which this paper is focusing on. Tables 1
to feed clean power to these more sensitive circuits. Further converters for energy storage can be added to the grid. This energy storage could for example be batteries or super ca-pacitors for
Download scientific diagram | Examples of onboard energy storage system (ESS) implementation. from publication: A Review of the Energy Efficiency Improvement in DC Railway Systems |
The onboard energy storage system (ESS) is highly subject to the fuel economy and all-electric range (AER) of EVs. In the voltage multiplier, a circuit with diodes and capacitors is used to
Abstract: 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.
While there is some overlap, the maritime industry poses specific challenges to the successful integration of energy storage into on-board power systems: size and weight are of greater importance, the power system is isolated for most of the time and the load characteristic of propellers favours mechanical propulsion.
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 modelling, design, and comparisons of specific on-board power systems for explicitly defined operational profiles.
Conclusions Several general observations on the use of energy storage on-board ships can be made from the presented results: 1. Systems with electric transmission benefit more from the use of energy storage than systems with hybrid transmission, as there are less losses associated to the battery.
A relevant number of urban and regional rail vehicles with onboard batteries are in operation in Europe, America, and Asia at this time. Practical use of such storage devices has shown that energy savings, line voltage stabilization, and catenary-free operation can be effectively achieved .
The relative efficiency of using batteries varies between -48% and + 57%. 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.
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