Iterative techniques for the solution of complex DC-rail-traction systems including regenerative braking

Cai, Yumeng; Irving, M.R.; Case, Steve

doi:10.1049/ip-gtd:19952098

Cited by 69 publications

(37 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3, the rectifier substation is modeled by Norton's equivalent source [13,14] in which I ss and R ss represent the Norton's short-circuit current and the Norton's resistance, respectively; R U1 and R U2 are the conductor resistances of the up-track sections; R D1 and R D2 are the conductor resistances of the down-track sections; P U1 and P D1 are the power consumptions of the running trains on the up-track and the down-track. The diode placed at the substation terminal is used to prevent any negative current flowing into the substation.…”

Section: Railway Power Supply Systemmentioning

confidence: 99%

“…The nature of DC railway power system is as simple as DC linear circuits unless traction power load model is taken into account. From the literature [11][12][13][14] and also proof by simulation experiences, the current injection method or alternatively current-vector iterative method (CIM) is more efficient than any others. However, for a large-scale DC power network, several hundred nodes or up to a thousand nodes, incomplete Cholesky conjugate gradient (ICCG) method [15] to handle large sparse matrices is preferred.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-train modeling and simulation integrated with traction power supply solver using simplified Newton–Raphson method

Kulworawanichpong

2015

J. Mod. Transport.

View full text Add to dashboard Cite

Multi-train modeling and simulation plays a vital role in railway electrification during operation and planning phase. Study of peak power demand and energy consumed by each traction substation needs to be determined to verify that electrical energy flowing in its railway power feeding system is appropriate or not. Gauss-Seidel, conventional Newton-Raphson, and current injection methods are well-known and widely accepted as a tool for electrical power network solver in DC railway power supply study. In this paper, a simplified Newton-Raphson method has been proposed. The proposed method employs a set of current-balance equations at each electrical node instead of the conventional power-balance equation used in the conventional Newton-Raphson method. This concept can remarkably reduce execution time and computing complexity for multi-train simulation. To evaluate its use, Sukhumvit line of Bangkok transit system (BTS) of Thailand with 21.6-km line length and 22 passenger stopping stations is set as a test system. The multi-train simulation integrated with the proposed power network solver is developed to simulate 1-h operation service of selected 5-min headway. From the obtained results, the proposed method is more efficient with approximately 18 % faster than the conventional Newton-Raphson method and just over 6 % faster than the current injection method.

show abstract

Section: Railway Power Supply Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-train modeling and simulation integrated with traction power supply solver using simplified Newton–Raphson method

Kulworawanichpong

2015

J. Mod. Transport.

View full text Add to dashboard Cite

show abstract

“…Cai, Y et al compared iterative methods for the conductance vector and current vector. This comparison indicated that the current vector is more efficient and that regenerative energy can be easily applied [2]. Various studies have investigated railway powerflow incorporating energy storage systems to reduce substation peaks as well as the efficient use of regenerative energy…”

Section: Introductionmentioning

confidence: 98%

“…Therefore, an iterative method should be applied to determine the powerflow. The Newton-Raphson method or Gauss Seidel method are generally used for powerflow calculations [1,2].…”

Section: Introductionmentioning

confidence: 99%

Development of a Novel Methodology for DC Railway Power Network Analysis Based on Participation Factor

Shin¹,

Jang²,

Shin

et al. 2017

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-Urban DC railways have played an important role in urban transportation, and railway operation and energy management have been emphasized to be important to achieve maximum efficiency from existing infrastructure. Fast, accurate DC railway power flow analysis is required to operate a DC railway efficiently, and this paper proposes a novel methodology to analyze the DC railway power network by implementing the participation factor (PF). The PF concept consists of a correlation between the vehicle and the substation, as explained using zones based on the position of the vehicles running on the route. Then, the DC railway powerflow is calculated using the PF concept. Finally, the usability of the proposed method was validated via case studies with actual railway operation data, and we discuss some of the advantages of the suggested methodology.

show abstract

“…In addition, a comprehensive approach, which performs the interface between the AC substation and the DC railway system, is should be considered. Much research has been carried out on this topic and various systems have been proposed, as documented in the literature [3][4][5][6][7]. These research efforts can be categorized into two techniques.…”

Section: Introductionmentioning

confidence: 99%

Development of AC/DC Hybrid Simulation for Operator Training Simulator in Railway System

Cho

Lee

Jang³

2014

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-Operator training simulator, within a training environment designed to understand the principles and behavior of the railway system with respect to operator's entries and predefined scenario, can provide a very strong benefit in facilitating operators' handling undesired operations. This simulator consists of computer system and applications, and the purpose of applications is to generate the power and voltage and analyze the AC substation and DC railway, respectively. This paper describes a novel approach to the new techniques for AC/DC hybrid simulation for the operator training simulator in the railway system. We first propose the structure the database of railway system. Then, topology processing and power flow using a linked-list method based on the proposed database, full or decoupled newton-rapshon methods are presented. Finally, the interface between the analysis for AC substation using a newton-rapshon method and the analysis for DC railway system using a time-interval power flow method is described. We have verified and tested the developed algorithm through the extensive testing for the proposed test system. To demonstrate the validity of the developed algorithm, comparative simulations between the proposed algorithm and PSS/E for the test system were conducted.

show abstract

Iterative techniques for the solution of complex DC-rail-traction systems including regenerative braking

Cited by 69 publications

References 1 publication

Multi-train modeling and simulation integrated with traction power supply solver using simplified Newton–Raphson method

Multi-train modeling and simulation integrated with traction power supply solver using simplified Newton–Raphson method

Development of a Novel Methodology for DC Railway Power Network Analysis Based on Participation Factor

Development of AC/DC Hybrid Simulation for Operator Training Simulator in Railway System

Contact Info

Product

Resources

About