Power quality improvement of DC electrified railway distribution systems using hybrid filters

Hosseini, Seyed Hossein; Shahnia, Farhad; Sarhangzadeh, Mitra; Babaei, Ebrahim

doi:10.1109/icems.2005.202752

Cited by 12 publications

(8 citation statements)

References 11 publications

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“…Moreover, through hybrid structures consisting of passive filters and SAPFs, the advantages of both types of filters are used with lower costs (Figure 2b). Examples of using a SAPF and a hybrid structure (SAPF and passive filter tuned on 5th and 7th harmonics) in DC-traction substations are provided by Ramos et al [28] and Hosseini et al [29]. Obviously, the proper control of the VSI in the structure of SAPF is the key for obtaining very good performance.…”

Section: Power Quality Conditioningmentioning

confidence: 99%

“…However, few papers in literature are directed on the power quality issue in DC traction systems. They mostly consist of investigations, monitoring activities [23,24], and solutions proposals for conditioning based on tuned passive harmonic filters [25,26], hybrid structures with static VAR compensators (SVCs) [27], or active power filters (APFs) [28,29], validated by simulation. Moreover, there is a lack of review papers on this topic.…”

Section: Introductionmentioning

confidence: 99%

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A Review of the Energy Efficiency Improvement in DC Railway Systems

Popescu

Bitoleanu

2019

Energies

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This study is focused on the topical issue of increasing the energy efficiency in DC railway systems, in the context of global concerns for reducing the CO2 emissions by minimizing the energy consumption and energy loss. The main achievements in this complex issue are synthesized and discussed in a comprehensive review, emphasizing the implementation and application of the existing solutions on concrete case studies. Thus, all specific subtopics related to the energy efficiency are covered, starting with power quality conditioning and continuing with the recovery of braking energy, of which a large part is lost in the classic DC-traction substations. The solutions of onboard and wayside storage systems for the braking energy are discussed and compared, and practical examples are given. Then, the achievements in transforming the existing DC-traction substations in reversible substations with capabilities of power quality improvement are systematically reviewed by illustrating the main results of recent research on this topic. They include the equipment available on the market and solutions validated through implementations on experimental models. Through the results of this extensive review, useful reference and support are provided for the research and development focused on energy efficient traction systems.

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Section: Power Quality Conditioningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review of the Energy Efficiency Improvement in DC Railway Systems

Popescu

Bitoleanu

2019

Energies

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“…Since the beginnings of last century they have been a preferred option due to their high performance, low maintenance cost, and lack of greenhouse-gas emissions [1] [2].…”

Section: Introductionmentioning

confidence: 99%

“…In AC based systems the voltage unbalance is the main problem [3], while in DC the harmonic generation must be taken into account. Harmonic distortion appears in this type of traction systems due to the presence of the rectifier substations in the network [4] [1].…”

Section: Introductionmentioning

confidence: 99%

Reactive power and harmonic distortion control in electric traction systems

Martínez

Ramos

2010

2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-La)

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Electric traction systems generate various power quality problems that have an important impact on its distribution network. In this paper a DC electric traction system was modeled in order to generate the problems that its operation implicated. Once the power quality phenomena were replicated a compensation device, SVC, was added to de distribution network to improve voltage and also a filter was installed in the same node to reduce wave distortion. Finally the possible events that can appear if the original configuration of the compensator device is changed are evaluated.

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“…A real substation would have a different power factor, include extra harmonics from the fundamental and sustain losses as described in Section 2.4.8. These are not modelled because the substations have large inductors, which reduce the current ripple and undesired harmonics from the rectifier and hence improve the power factor (Dixon 2005, Hosseini 2005, Mohan 2003). The amount of energy loss in the substation is much less than that lost in the conductors and rails.…”

Section: Assumptions and Boundary Conditionsmentioning

confidence: 99%

Simulation of energy efficiency improvements on commuter railways

Hull¹,

Roberts²,

Hillmansen³

2010

IET Conference on Railway Traction Systems (RTS 2010)

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Railway networks consume large amounts of energy and, as a result, are the cause of a significant amount of CO2 and other harmful gas emissions. British railways strive to comply with objectives set by the European Rail Research Advisory Council and the Committee on Climate Change. Improvements in the operation of railway networks through the use of energy efficiency regimes can decrease the operational costs and CO2 emissions. Existing and industry proven methods include regeneration, coasting allowances and driver training. The use of a simulator allows railway organisations to understand and quantify the benefits of the various methods for their particular rolling stock and networks.This thesis describes the development of a multi-train simulator for the Merseyrail network. The simulator is based on a pre-existing single train simulator.Results from the simulator show that a combination of regeneration, introduction of coasting points and improved driving style have the potential to provide up to a 50% increase in energy efficiency. In particular, the study shows that a 23% reduction in energy consumption through regeneration; a 22% energy reduction with the strategic placement of coasting points; and a 4% reduction in energy when an improved driving style is adopted, are possible. These improvements have the potential to eliminate 12 kilotonnes of CO2 emissions from Merseyrail per year. ACKNOWLEDGEMENTS

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Power quality improvement of DC electrified railway distribution systems using hybrid filters

Cited by 12 publications

References 11 publications

A Review of the Energy Efficiency Improvement in DC Railway Systems

A Review of the Energy Efficiency Improvement in DC Railway Systems

Reactive power and harmonic distortion control in electric traction systems

Simulation of energy efficiency improvements on commuter railways

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