scholarly journals Impacts of Light Rail Transit Tram on the Voltage and Unbalance of the Distribution System

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Cheng-Ting Hsu ◽  
Hung-Ming Huang ◽  
Tsun-Jen Cheng ◽  
Lian-Jou Tsai
Keyword(s):  
Distribution System ◽  
Single Phase ◽  
Neutral Line ◽  
Dynamic Responses ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
System A ◽  
Three Phase

This paper presents the three-phase voltage and unbalance analysis for the distribution system with the loading of a light rail transit (LRT) tram. To investigate the dynamic responses of the system voltage and current, this paper adopts the Alternative Transients Program (ATP) software to model and simulate a multigrounded four-wire distribution system with an LRT loading. Two different definitions about unbalance are used to evaluate the problem. In this paper, the traction supply substation (TSS) with a single-phase transformer configuration is designed first for providing the electric power to the trams of LRT. However, it may result in the significant neutral line current and unbalance phenomenon to deteriorate the power quality of the distribution system. A Le-Blanc connection transformer in the TSS is therefore proposed to solve the problems.

Harmonic Analysis and Filter Design for the Light Rail Transit Systems

2013 ◽  
Vol 479-480 ◽  
pp. 210-214
Author(s):  
Cheng Ting Hsu ◽  
Hung Ming Huang ◽  
Tsun Jen Cheng ◽  
Lian Jou Tsai
Keyword(s):  
Harmonic Analysis ◽  
Distribution System ◽  
Filter Design ◽  
Harmonic Distortion ◽  
Dynamic Responses ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Transit System ◽  
Transit Systems

This paper presents the light rail transit system (lrts) impact on the harmonic pollution of distribution feeder. To investigate the dynamic responses of the system voltage and current, the distribution system and lrts models are set up well by using the Alternative Transients Program (ATP). The harmonic analysis of the distribution system with the lrts is executed under various operation scenarios. The 6-pulses and 12-pulses rectifier are adopted for the lrts with a direct current (dc) power supply to the trams. Furthermore, the well-designed filters have also applied to improve the harmonic distortion resulted from the lrts.

Privatisation of fixed-rail transit systems: a case study of Malaysia's STAR and PUTRA

2006 ◽  
Vol 33 (7) ◽  
pp. 846-853 ◽  
Author(s):  
Abdul-Rashid Abdul-Aziz
Keyword(s):  
Capital City ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Kuala Lumpur ◽  
Transit System ◽  
Transit Systems ◽  
The Public ◽  
Privatisation Programme

Since the early 1980s, many public utilities have been privatised under Malaysia's privatisation programme. A few, however, have since prematurely returned to government hands, among them the two light-rail transit systems in the capital city of Kuala Lumpur, STAR and PUTRA. This paper chronicles the pre- and post-privatisation events of both facilities before attempting to provide rational explanation behind their untimely surrender to the public domain. Based on publicly available material, this paper argues that neither the quality of government negotiators nor the length of time devoted to negotiating could be attributed to the bailout. Nor is there hint that political favouritism and corruption were at play. More than likely, despite the copious incentives provided to the two concession companies, the two projects proved financially unviable.Key words: build–operate–transfer (BOT), Malaysia, privatisation, light-rail transit system.

scholarly journals Service Quality of Addis Ababa Light Rail Transit: Passengers’ Views and Perspectives

2020 ◽  
Vol 6 (4) ◽  
pp. 231-243
Author(s):  
Adane Obsie ◽  
Mintesnot Woldeamanuel ◽  
Berhanu Woldetensae
Keyword(s):  
Factor Analysis ◽  
Service Quality ◽  
User Satisfaction ◽  
Local Governments ◽  
Service Providers ◽  
Addis Ababa ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit

AbstractUnderstanding the service quality of public transportation based on users’ perception is an important input for local governments and transit service providers in their planning efforts to improve system performance. Using the Addis Ababa Light Rail Transit (AALRT) as a case, this study aims to examine service users' views and perspectives by using 18 quality attributes. Factor analysis and ordered logit model were employed for this study. Factor analysis with principal components was used to extract the most important factors of satisfaction from the 18 attributes. The results showed that safety and security, ticketing system, travel information, crowdedness, frequency, cleanliness, and comfort are the most important factors influencing user satisfaction. The level of importance of these factors varies depending on different socioeconomic and travel characteristics of AALRT users. Riders who use the light rail at afternoon peak hours, have high household income and short travel duration, and use LRT for shopping purposes have a negative perception regarding the crowdedness, frequency, ticketing, and information system of the AALRT. Passengers with longer travel distance, those who use the AALRT frequently, and full- or part-time workers and students have a positive perception towards several attributes of the system.

Three-phase to Single-phase Matrix Converter for Improvement of Three-phase Voltage Unbalance in Distribution System

2015 ◽  
Vol 135 (3) ◽  
pp. 168-180 ◽  
Author(s):  
Ryota Mizutani ◽  
Hirotaka Koizumi ◽  
Kentaro Hirose ◽  
Kazunari Ishibashi
Keyword(s):  
Distribution System ◽  
Single Phase ◽  
Matrix Converter ◽  
Phase Voltage ◽  
Voltage Unbalance ◽  
Three Phase

scholarly journals From “Big Small Town” to “Small Big City”: Resident Experiences of Gentrification along Waterloo Region’s LRT Corridor

2021 ◽  
pp. 0739456X2199391
Author(s):  
Margaret Ellis-Young ◽  
Brian Doucet
Keyword(s):  
Statistical Analysis ◽  
Strong Evidence ◽  
Small Town ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Big City ◽  
Waterloo Region

Most studies of transit-induced gentrification rely on statistical analysis that measures the extent to which gentrification is occurring. To extend and enhance our knowledge of its impact, we conducted sixty-five interviews with residents living along the light rail transit (LRT) corridor in Waterloo Region, Ontario, Canada, shortly before the system opened. There was already strong evidence of gentrification, with more than $3 billion (Canadian dollars) worth of investment, largely in condominiums, before a single passenger was carried. In line with contemporary critical conceptualizations of gentrification, our interviews identified new and complex psychological, phenomenological, and experiential aspects of gentrification, in addition to economic- or class-based changes.

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