Loss Minimization of Electrified Railway Traction Systems Using SVC Based on Particle Swarm Optimization

Lee, Gyu Sub; Hwang, Pyeong-Ik; Lee, Byeong-Gon; Moon, Seung-Il

doi:10.1109/access.2020.3042467

Cited by 10 publications

(3 citation statements)

References 25 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].…”

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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“…SVC could be considered as the most popular FACTS device with two specific properties: (a) despite all its constructed elements being passive, it can distribute active power between three phases correctly, (b) although SVC is made of the elements with constant impedance, it is able to establish variable impedance in the network [31,32]. Specifically, in the traction system applications, SVC is required in order to fulfill these purposes (a) load current balancing and power factor correction, (b) adjusting the system positive sequence current in an acceptable range, (c) controlling the negative sequence current magnitude in a selectable range [33][34][35].…”

Section: Svc Implementationmentioning

confidence: 99%

Multi-Objective Real-Time Tuning of SVC Used in Electrified Traction Systems

Bigharaz

Dehcheshmeh

Givi

et al. 2022

Sensors

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Electric train system is a very large load for the power network. This load consumes a large amount of reactive power. In addition, it causes a massive unbalance to the network, which results in many problems such as voltage drops, high transmission losses, reduction in the transformer output ability, negative sequence current, mal-operation of protective relays, etc. In this paper, a novel real-time optimization approach is presented to adjust the static VAR compensator (SVC) for the traction system to realize two objectives; current unbalance reduction and reactive power compensation. A multi-objective optimization technique entitled non-dominated sorting genetic algorithm (NSGA-II) is used to fulfill the regarded objectives simultaneously. A comprehensive simulator has been designed for electric train network modeling that is able to adjust the parameters of SVC in an optimum manner at any time and under any circumstances. The results illustrate that the provided method can efficiently reduce the unbalancing in current as well as supply the demanded reactive power with acceptable precision.

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“…Electrified railway is an important part of comprehensive transportation hub, which has been supported and vigorously developed by countries all over the world [1][2][3][4]. When the electric locomotive passes the neutral-section, there will be a complex electromagnetic transient process.…”

Section: Introductionmentioning

confidence: 99%

Research on Transient Low-Frequency Oscillation of Electrified Railway Vehicle-Grid Coupling System

Cao

et al. 2023

IEEE Access

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At the moment of electric locomotive passing the neutral-section, the voltage and current of traction network may have low-frequency oscillation (LFO), which will seriously affect the safe operation of the railway. Aiming at eliminating LFO, a modeling method of vehicle-grid coupling system based on flux-current theory is presented in this paper. In the model of electric locomotive, the transient current control strategy and magnetic saturation of on-board transformer are considered, and the equivalent model of excitation inductance of on-board transformer is established based on the flux-current theory. Using this model, based on the Middlebrook impedance ratio criterion, the stability region of vehicle-grid coupling system is analyzed under the influence of average saturation of on-board transformer and control parameters of electric locomotive. Simulation results and analysis are established to evaluate and verify the proposed modeling method of LFO. This work has the benefits of defining the opening and closing phase angle region of system stability as well as providing guidance to adaptively modify the control parameters to suppress the LFO.

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Loss Minimization of Electrified Railway Traction Systems Using SVC Based on Particle Swarm Optimization

Cited by 10 publications

References 25 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

Multi-Objective Real-Time Tuning of SVC Used in Electrified Traction Systems

Research on Transient Low-Frequency Oscillation of Electrified Railway Vehicle-Grid Coupling System

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