A Power Factor-Oriented Railway Power Flow Controller for Power Quality Improvement in Electrical Railway Power System

Hu, Sijia; Xie, Bin; Li, Yong; Gao, Xiang; Zhang, Zhiwen; Luo, Longfu; Krause, Olav; Cao, Yijia

doi:10.1109/tie.2016.2615265

Cited by 43 publications

(9 citation statements)

References 35 publications

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“…Modern railway line voltage stabilization is made using a static VAR compensator (SVC), located near the neutral zone [19,20] , or using mobile reactive power compensation strategies [3,21,22]. The railway power conditioner system (RPC) is employed in conjunction with V/V transformers and offers very good performance regarding 3-phase power balancing and power factor correction [10,23,24]. Similarly, the co-phase system [25][26][27][28] , has similar characteristics in terms of an optimized 3-phase interface.…”

Section: Literature Reviewmentioning

confidence: 99%

Traction power substation balance and losses estimation in AC railways using a power transfer device through Monte Carlo analysis

Morais

Martins

2022

Rail. Eng. Science

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The high dynamic power requirements present in modern railway transportation systems raise research challenges for an optimal operation of railway electrification. This paper presents a Monte Carlo analysis on the application of a power transfer device installed in the neutral zone and exchanging active power between two sections. The main analyzed parameters are the active power balance in the two neighbor traction power substations and the system power losses. A simulation framework is presented to comprise the desired analysis and a universe of randomly distributed scenarios are tested to evaluate the effectiveness of the power transfer device system. The results show that the density of trains and the relative branch length of a traction power substation should be considered in the evaluation phase of the best place to install a power transfer device, towards the reduction of the operational power losses, while maintaining the two substations balanced in terms of active power.

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Section: Literature Reviewmentioning

confidence: 99%

Traction power substation balance and losses estimation in AC railways using a power transfer device through Monte Carlo analysis

Morais

Martins

2022

Rail. Eng. Science

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“…In the current scenario, the power factor problem has been divided into two areas, design or development of compensation devices and analysis of power factor behaviour [8] [9]. Static VAR, Static power conditioner, active and hybrid power quality conditioner all are compensation devices [10,11,1,12,13,14,15,16,17,18]. The conventional set of the ac-dc thyristor is used in single-phase, 25 kV electrified traction system locomotives, it draws rich harmonic current content and low displacement power factor.…”

Section: Issues In Electric Traction Systemmentioning

confidence: 99%

Effect of Unaccounted Parameters on Reactive Power Compensation in Indian Electric Traction Line

Saini

C²,

Yadav

2020

IEEE Access

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The quest for electrification of railway tracks is very high at developing countries, with a very high ratio of population per kilometre length of railway track. India has electrified almost 50% of its track length and aiming 3000 km track electrification every year. Presently in Indian traction system, all the fault locating methods and power factor correction methods for AC high voltage line are based on the conventional model of railway Overhead Equipment (OHE). The conventional OHE model does not include the effect of self-generated reactive power at the geographically challenged area. This paper explains, how the variations in parasite capacitance of OHE adversely affect the prevailing conventional power factor improving methods; after monitoring the active power, apparent power, leading reactive power injected to improve the power factor of AC high voltage traction system for one calendar year, at two different Traction Sub Stations (TSS). Further simulation of 61 km track with actual mixed geographical terrain to validate the experimental results and to develop a new power factor correction algorithm has been done. The proposed algorithm has been implemented on one TSS of Southern Indian Railways division, and it turns out in reducing penalty around 2.5 million Indian rupees per year, paid by sampling region TSS.

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“…However, this compensator did not consider the energy feedback which may increase the dc‐link voltage level because of the existing LC‐coupled branches. In [9, 10], an optimal compensation control strategy was proposed to reduce the compensation capacity of the compensation devices. However, the optimised compensation effectiveness was limited by some criteria.…”

Section: Introductionmentioning

confidence: 99%

Collaborative unbalance compensation method for high‐speed railway traction power supply system considering energy feedback

Yuan

Xiao

Zhang³

et al. 2019

IET Power Electronics

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The unbalance current issue of the high-speed railway is the most prominent power quality of the traction power supply systems. Bullet trains can generate energy feedback when they brake, which should not be neglected. In this study, the effects of energy feedback on the unbalance issue are analysed, under different operating conditions of the trains. A collaborative unbalance compensation method (CUCM) for the high-speed railway is proposed in this work to lower the compensation capacity of the expensive power electronics compensation devices. To ensure that the CUCM works well, a further analysis of the two compensation principles, the railway power conditioner principle and Steinmetz principle, was carried out. The analysis results showed that the two compensation principles have different implementation methods and compensation current expressions, but the compensation essences were the same. According to the principle analysis results, a collaborative strategy was used. A capacity analysis of the CUCM, based on the actual operating situations of the bullet trains, was also completely done in this study. The simulation and experimental results showed that the proposed CUCM could adequately compensate the unbalance current of the high-speed railway power systems well with a low cost, in both traction and energy feedback situations.

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A Power Factor-Oriented Railway Power Flow Controller for Power Quality Improvement in Electrical Railway Power System

Cited by 43 publications

References 35 publications

Traction power substation balance and losses estimation in AC railways using a power transfer device through Monte Carlo analysis

Traction power substation balance and losses estimation in AC railways using a power transfer device through Monte Carlo analysis

Effect of Unaccounted Parameters on Reactive Power Compensation in Indian Electric Traction Line

Collaborative unbalance compensation method for high‐speed railway traction power supply system considering energy feedback

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