Optimal Design for Power Quality of Electric Railway

Lee, Hanmin; Kim, Gildong; Oh, Sehchan; Lee, Changmu

doi:10.1109/sice.2006.314842

Cited by 15 publications

(5 citation statements)

References 6 publications

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“…series RC, can be an option addressing higher-order harmonic issues (e.g. applied in South Korea [102]); second-order HPFs (2-HPFs), also named as second order damping filters (SODFs), are an effective solution to TPSS resonances (applied in Japan [21], Zimbabwe [2] and China [74]); third-order HPFs (3rd HPFs) are not a common choice in this application; C-type filters (CTFs) with their promising features, have certain potential in TPSS for harmonic problems [31]. Fig.…”

Section: Resonance Eliminationmentioning

confidence: 99%

High-Order Harmonic Resonances in Traction Power Supplies: A Review Based on Railway Operational Data, Measurements, and Experience

Song

Wang

Yang

et al. 2020

IEEE Trans. Power Electron.

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Harmonic resonances in traction power supply systems (TPSSs) have attracted great attention due to their potentially destructive impact on the safe and stable operation of railways. Based on operation data acquired from Chinese railways, this paper presents a comprehensive review of this issue considering both academic and engineering requirements. Analysing actual incidents, the general patterns and effects of TPSS resonances are derived. The relation between the TPSS and the locomotive is illustrated by circuit models. Relevant methods for modeling locomotives and TPSSs are discussed. Both advanced resonance analysis methods giving general influence factors and a simplified resonance analysis explaining resonance features in a practical manner are discussed. Multiple groundbased and on-board solutions for resonance elimination are presented. At last, pre-identifying resonances in actual systems is investigated for addressing the open topic of resonance prevention.

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Section: Resonance Eliminationmentioning

confidence: 99%

High-Order Harmonic Resonances in Traction Power Supplies: A Review Based on Railway Operational Data, Measurements, and Experience

Song

Wang

Yang

et al. 2020

IEEE Trans. Power Electron.

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“…Considering requirements for light weight and reliability, this method is abandoned in many modern ac-drive railway vehicles. An alternative is installing high-pass passive filters in electrical substations (ESSs) or section posts (SPs) [13], [22], [23]. The passive filters can filter out most of the highfrequency harmonics on the supply network but also move the resonant frequency of the TPSS without any extra circuits on board.…”

Section: B Resonance Suppression Approachesmentioning

confidence: 99%

Windowed SHE-PWM of Interleaved Four-Quadrant Converters for Resonance Suppression in Traction Power Supply Systems

Song

Konstantinou

Wang

et al. 2017

IEEE Trans. Power Electron.

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AC electric locomotives that use a number of interleaved four-quadrant converters (4QCs) generate high frequency switching harmonics which may stimulate certain resonances in traction power supply systems (TPSSs). A windowed selective harmonic elimination pulse-width modulation (SHE-PWM) method is proposed to suppress such resonances. Owing to the windowed design and the precalculated solutions, the proposed method covers the wide potential resonant frequency range and addresses the resonant frequency variation while keeping the low switching frequency of the traction converters. The proposed windowed SHE-PWM is fully tested with a closedloop controller in a simulation model with the TPSS and the ac electric locomotive. Comparative simulation results show that the windowed SHE-PWM is an effective alternative that overcomes the resonance suppression limitations of the conventional phase-shifted PWM (PS-PWM). The performance of proposed windowed SHE-PWM on an experimental equivalent resonant circuit is further evaluated and compared with PS-PWM. Both simulation and experimental results verify the effectiveness and feasibility of the proposed method.

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“…Most of the locomotives employed on the Italian railways are of old generation and do not have a gradual regulation of the current draining. A computer-based smart management of the electrical traction [3,11] can lead to a decrease of the current peaks and transients on the power line with the consequent reduction of electric disturbances [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Energy Savings in Electric Railways Using Coasting Technique

et al. 2021

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The main goal of this work is the evaluation of the energy saving achievable in railway drive when using the coasting technique extensively, with reference to a practical case of the Italian railway network taken as an example. This technique consists in exploiting the kinetic energy accumulated by the running train whenever possible. To implement a driving style on purpose, the only driver contribution is not enough; indeed, it is necessary to provide an embedded automatic calculation control system. In the paper, an algorithm has been developed to evaluate the energy absorption of railway locomotives during the normal service and validated on a real railway line. The proposed hardware and software system could be implemented aboard the train, allowing motion data processing in real-time. Speed, time intervals and power absorption for a given path are calculated; then, the best coasting parameters are estimated to maximize the energy savings. In particular, the case study presented in the paper showed that the fast-run strategy, always adopted by the railway company to recover an unexpected delay, can lead to a negligible time recovery with respect to the coasting strategy, while determining a significantly larger energy consumption.

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Optimal Design for Power Quality of Electric Railway

Cited by 15 publications

References 6 publications

High-Order Harmonic Resonances in Traction Power Supplies: A Review Based on Railway Operational Data, Measurements, and Experience

High-Order Harmonic Resonances in Traction Power Supplies: A Review Based on Railway Operational Data, Measurements, and Experience

Windowed SHE-PWM of Interleaved Four-Quadrant Converters for Resonance Suppression in Traction Power Supply Systems

Improvement of Energy Savings in Electric Railways Using Coasting Technique

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