Results 61 to 70 of about 1,661 (198)

Pixel‐Level Inversion Assessment for Ageing of Composite Insulator Sheds of Power System

open access: yesHigh Voltage, EarlyView.
ABSTRACT The polymeric materials used in insulator sheds are prone to ageing under different environmental conditions, which can lead to flashovers and grid outages. The ageing process in composite insulators primarily involves changes in the microscopic properties of the materials.
Yang Liu   +8 more
wiley   +1 more source

Modular multilevel converter in electrified railway systems: applications of rail static frequency converters and rail power conditioners [PDF]

open access: yes, 2020
The Modular Multilevel Converter (MMC) has become the most preferable multilevel converter topology for medium and high-power systems, due to the MMC's high reliability and redundancy.
Tanta, Mohamed   +9 more
core   +1 more source

Research on the modeling of the impedance match bond at station track circuit in Chinese high-speed railway

open access: yesAdvances in Mechanical Engineering, 2015
Frequency-shift keying audio jointless track circuit is used in high-speed railway in China. However, within the station, track circuit with mechanical insulation is applied. In complex circuit network of electrified railway station, impedance match bond
Shiwu Yang   +3 more
doaj   +1 more source

Application Status and Development Trends of DC Ice‐Melting Devices in China's Power Grid

open access: yesIET Smart Energy Systems, EarlyView.
This paper summarises the development history and engineering application status of DC ice‐melting devices (DCIMD) in China, analyses the principles, advantages, disadvantages and adaptability of mainstream topologies and discusses the key problems and corresponding improvement directions.
Ming Lei   +6 more
wiley   +1 more source

Vehicle Engineering Application Study on TSF Var Compensation Method for Electric Locomotive of Electrified Railway [PDF]

open access: yes, 2011
The application of electric power, which acts as a pillar energy and economic artery in modern society, is one of the most important symbols of the level of development and comprehensive national power of a country. Var is a crucial factor for the design
Jing Shuai Xiao, Yu Lin Dong, Ling Wei
core   +1 more source

Optimization of Wind‐PV Co‐Generation Systems Using Artificial Bee Colony and Back‐to‐Back Voltage Source Converter

open access: yesIET Smart Energy Systems, EarlyView.
The Graphical Abstract depicts the proposed Artificial Bee Colony algorithm‐based optimal tuning of PI controllers for back‐to‐back Voltage Source Converters in a hybrid wind–PV system. ABSTRACT This paper proposes a hybrid model‐based back‐to‐back voltage‐source converter (B2B‐VSC) system comprising a Photovoltaic (PV) array and a Permanent Magnet ...
Ch. Sreenu   +3 more
wiley   +1 more source

Methodologies to identify non-electrified railway lines to be converted to hydrogen [PDF]

open access: yes
Although the rail transportation system is generally considered to have one of the lowest environmental impacts, this is not always true. Indeed, in the case of non-electrified railway lines, the propulsion system typically is based on diesel engines ...
D'Acierno, L.
core  

Forces Behind South Australia's Unusual Structural Changes Since 1840

open access: yesAustralian Journal of Agricultural and Resource Economics, EarlyView.
ABSTRACT The agricultural sector's share of GDP in growing economies typically declines but, for a century from the early 1850s, Australia's did not. That trend is most evident for the former colony and now State of South Australia (SA). Moreover, that share for SA has been almost flat since 1980 as well, along with the agricultural sector's share of ...
Kym Anderson
wiley   +1 more source

Adoption hydrogen in railway traction: Opportunities and limits in the case of non-electrified railway lines [PDF]

open access: yes
Although rail transport is generally considered a sustainable transport system, and numerous research and design methods are based on considering rail transport as the backbone of public transport and/or sustainable mobility, it is necessary to highlight
D'Acierno, L.
core  

The liberalisation of European railway markets - laissez faire versus interventionism: a comparative analysis of the approaches to railway privatisation in the United Kingdom and Germany. [PDF]

open access: yes, 2002
This thesis comprises railway innovation in the 19th century, railway regulation, recent railway reforms across Europe and a theoretical analysis. The historical study is complemented by an investigation of the rationale for extensive regulations and ...
Knipping, O
core  

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