An energy-efficient train trajectory describing the motion of a single can be used as an input to driver guidance system or automatic control system. The solution for best is subject certain operational, geographic, and physical constraints. There are two types strategies commonly applied obtain trajectory. One allow coast, thus using its available time margin save energy. other one speed dynamically while maintaining required journey time. This paper proposes distance-based searching model,...

Energy saving on electrified railways has been studied for many years and the technical solution is usually provided by a combination of driving strategy (e.g. coasting), regenerative braking energy storage systems. An alternative approach driver (or automatic train operation system if fitted) to manage consumption more efficiently. A formal method optimising traction during single-train journey trading-off reductions in against increases running time demonstrated. The balance between faster...

This study presents the recent application of energy storage devices in electrified railways, especially batteries, flywheels, electric double layer capacitors and hybrid devices. The reuse regenerative braking is managed by depending on purpose each system. advantages resulting from use are presented observing results both verification tests practical applications passenger services. Several real installations for railways shown compared using Ragone plot. effect future discussed. Finally,...

Regenerative braking improves the energy efficiency of railway transportation by converting kinetic into electric energy. This paper proposes a method to apply Bellman-Ford (BF) algorithm search for train speed trajectory increase total regenerative (RBE) in blended mode with both and mechanical forces available. The BF is applied discretized train-state model. A typical suburban has been modeled studied under real engineering scenarios involving changing gradients, journey time, limits. It...

In railway operations, if the journey of a preceding train is disturbed, service interval between it and following trains may fall below minimum line headway distance. If this occurs, interactions will happen, which result in extra energy usage, knock-on delays, penalties for operators. This paper describes trajectory (driving speed curve) optimization study to consider tradeoff reductions usage against increases delay penalty situation with fixed block signaling system. The are considered...

Compared with energy storage equipment based on supercapacitors, flywheels, or lithium batteries, inverters have obvious advantages in installation space, cost, reliability, and service lifetime. For this reason, regenerative are increasingly installed the substations of urban rail transit systems. They controllable operating characteristics, but their impact saving railway operation cost has not been fully studied. In paper, typical application scheme inverters, characteristics inverter...

This paper presents the development of SmartDrive package to achieve application energy-efficient driving strategy. The results are from collaboration between Ricardo Rail and Birmingham Centre for Railway Research Education (BCRRE). Advanced tram train trajectory optimization techniques developed by BCRRE as part UKTRAM More Energy Efficiency Tram project have been now incorporated in Ricardo's product offering. method, associated driver training awareness (SmartDrive) has use on tram,...

An advanced combined co-phase traction power supply system is proposed by combining a single-phase transformer and an active flow controller (PFC) in electrified railway. In the new system, quality problems caused load are solved grid side continuous can be provided to electric trains without neutral sections side. The mathematic model of built transformation analysis. compensation currents PFC calculated based on balance principle. According standard China, optimised partial algorithm...

Regenerating trains are now in common use on many DC fed railway systems, and train operating companies able to get a discount their energy costs if regeneration is active. The electrical consumption system significant, comprehensive understanding of how affects the overall has not been developed. This study presents simulation method which multi-train analysis used determine with without operation, as well impact different headways. results full 'energy audit' based data Beijing Yizhuang...

Railways are a vital part of the world economy, transporting both goods and passengers. Freight trains transport large quantities goods, whereas high-speed fastest land passenger systems. At present, majority rail networks across nonelectrified. They run diesel-powered that require refueling stations produce high noise levels pollutant emissions. On other hand, electrified railways have network directly supplies locomotives by pantographs or conducting shoes. Because electric do not carry...

Electrical and electronic components are very important subcomponents in modern industrial wind turbines. Complex multimegawatt turbines continuously being installed both onshore offshore, increasing the demand for sophisticated electrical components. In this work, most critical have been identified applicability of appropriate condition monitoring processes simulated. A fault tree dynamic analysis has carried out by binary decision diagrams to obtain system failure probability over time...

Improved fuel consumption and lower emissions are two of the key objectives for future transportation. Hybrid electric vehicles (HEVs), in which or more power systems combined, can meet these through capture reuse regenerated braking energy optimized use prime mover. However, complicated power-management strategies required such vehicles. This paper explores potential applying to advanced a diesel multiple-unit (DMU) train. These types have multiple engines that commonly operated homogenous...

The history of railway axle design against fatigue is reviewed through a discussion several notable accidents caused by broken axles. earliest prompted research into which resulted in phenomenological understanding. In the last 50 years, largely directed towards aircraft industry, has been recognized to be process involving crack initiation and propagation. Fracture mechanics now used assist timing inspection intervals, but small number failures still occur. paper concludes with short modern...

Concerns over future energy security, costs, and competitiveness with other modes have prompted the railway industry to search for cost-effective efficient traction solutions which will ensure continuing business feasibility. For non-electrified routes, where case electrification is unfavourable, usually provided by diesel fuel combustion. Hybridization offers potential achieve a step change in efficiency. This article presents an analysis of benefits hybridization rail vehicles. The...

Many railway vehicles use diesel as their energy source but exhaust emissions and concerns about economical fuel supply demand alternatives. Railway electrification is not cost effective for some routes, particularly low-traffic density regional lines. The journey of a diesel–electric train simulated over the British route Birmingham Moor Street to Stratford-upon-Avon return establish benchmark conceptual design hydrogen-powered hydrogen-hybrid vehicle. A cell power plant, compressed...