Load flow analysis and future development study for an AC electric railway

Raygani, Saeid Veysi; Tahavorgar, Amir; Fazel, Seyed Saeed; Moaveni, Bijan

doi:10.1049/iet-est.2011.0052

Cited by 51 publications

(37 citation statements)

References 11 publications

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“…Model Accuracy Applicability to Feeding Scheme Convergence Speed [14] Accurate All Linear [15][16][17] Accurate All Quadratic [3,[18][19][20][21] Accurate AT 1 feeding Linear [22] Accurate AT feeding Quadratic MNFA 2 More accurate All Linear PA More accurate All Quadratic 1 AT: auto transformer. 2 MNFA: Multiple conductor Nodal Fixed-point Algorithm.…”

Section: Algorithmmentioning

confidence: 99%

“…China has the greatest amount of high-speed railways in service in the world, over 22,000 km by the end of 2016. With the rapid development of high-speed and heavy-haul railways, modern high power locomotives and electric multiple units (EMUs) have been designed and applied in main railway lines [3][4][5]. Their high power consumption has brought about a problem of insufficient power supply capacity (PSC) [6] of the single-phase 25 kV or 2 × 25 kV alternating current (AC) traction power supply systems (TPSSs) that are widely adopted to feed trains [7].…”

Section: Introductionmentioning

confidence: 99%

“…A number of power flow algorithms have been proposed for TPSSs in the past decades, as listed in Table 1. Though the algorithms of [3,[14][15][16][17][18][19][20][21][22] are applicable, the Multiple conductor Nodal Fixed-point Algorithm (MNFA), involving the multiple conductor model, a nodal analysis, and fixed-point iteration [23][24][25][26][27][28][29][30], has acquired the widest use because of its accuracy and convenience for programming. However, the MNFA cannot offer convincing evidence of the power limit for PSC assessment.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Power Flow Algorithm for Traction Power Supply Systems Based on the Thévenin Equivalent

2018

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Abstract:With the rapid development of high-speed and heavy-haul railways throughout China, modern large power locomotives and electric multiple units (EMUs) have been applied in main railway lines. The high power requirements have brought about the problem of insufficient power supply capacity (PSC) of traction power supply systems (TPSSs). Thus, a convenient method of PSC assessment is meaningful and urgently needed. In this paper, a novel algorithm is proposed based on the Thévenin equivalent in order to calculate the PSC. In this algorithm, node voltage equations are converted into port characteristic equations, and the Newton-Raphson method is exploited to solve them. Based on this algorithm, the PSC of a typical high-speed railway is calculated through the repeated power flow (RPF). Subsequently, the effects of an optimized organization of train operations are analyzed. Compared to conventional algorithms, the proposed one has the advantages of fast convergence and an easy approach to multiple solutions and PV curves, which show vivid and visual information to TPSS designers and operators. A numerical analysis and case studies validate the effectiveness and feasibility of the proposed method, which can help to optimize the organization of train operations and design lines and enhance the reliability and safety of TPSSs.

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Section: Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Novel Power Flow Algorithm for Traction Power Supply Systems Based on the Thévenin Equivalent

2018

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“…The power consumption curve is examined based on the movement of the vehicle for the optimum power system design. The variety of vehicle models, dynamic load state, operational problems, and the determination of the places of substations make this simulation more complex and more difficult [8]. Catenary voltage and current, vehicle voltage, flow, and other electrical data are analyzed with this simulation.…”

Section: Introductionmentioning

confidence: 99%

Creation of a dynamic model of the electrification and traction power system of a 25 kV AC feed railway line together with analysis of different operation scenarios using MATLAB/Simulink

Kocaarslan¹,

Akçay²,

Ulusoy³

et al. 2017

Turk J Elec Eng & Comp Sci

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Abstract:In this study, the simulation of an electrification system and traction power system of a 25 kV AC feed railway line was performed with all its subcomponents using MATLAB/Simulink. The power flow theory was used while modeling the railway electrification system. The transformer substation, catenary, rail, and vehicle were modeled together with the operational data. This model is used in order to determine the number of transformers, the distance of feeding centers, and the frequency of trips. The optimum design of electrification projects depends on these criteria.A dynamic structure was created with a new algorithm developed for vehicle load characteristics. The simulation of the electrification system and traction power system is performed before the analysis stage, together with the vehicle and other design parameters. This analysis is performed for the best performance of the systems. In this study, the power simulation of the railway was conducted for three different operation scenarios using MATLAB/Simulink.

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“…The single-phase 25 kV AC traction power supply system (TPSS) is popular in electrified railway [1].The rapid growth of traction load leads to heavy unbalanced three phase and reactive power exceeding Chinese standards for power quality, especially in some areas with weak power grid [2,3]. Meanwhile, a large number of existing DC powered locomotives generate reactive power and decrease the power factor (PF), which can make the traction transformer working in derated state and increase the power transmission losses [4].…”

Section: Introductionmentioning

confidence: 99%

Study on new traction power supply system for power quality comprehensive compensation in electrified railway

Chen

Luo

Jiang

et al. 2015

TENCON 2015 - 2015 IEEE Region 10 Conference

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The outstanding power quality problems including three-phase voltage unbalance and large reactive power have drawn more and more attention of railway company and power system. Moreover, the neutral section insulators at exits of substations affect the safety and efficiency of the electric trains, especially in high speed railway and heavy haul railway. A new traction power supply system adopting Vx connection traction transformer and active power flow controller (PFC) is proposed. The mathematic model of the new system is built and the compensation currents of PFC are calculated for comprehensive compensation. Moreover, the optimized topology and control method of PFC are studied. The simulation and performance of the different operation modes verify the validity of the proposed system, which can be used in high speed and heave haul railways.

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Load flow analysis and future development study for an AC electric railway

Cited by 51 publications

References 11 publications

A Novel Power Flow Algorithm for Traction Power Supply Systems Based on the Thévenin Equivalent

A Novel Power Flow Algorithm for Traction Power Supply Systems Based on the Thévenin Equivalent

Creation of a dynamic model of the electrification and traction power system of a 25 kV AC feed railway line together with analysis of different operation scenarios using MATLAB/Simulink

Study on new traction power supply system for power quality comprehensive compensation in electrified railway

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