2$\,\times\,$25-kV 50 Hz High-Speed Traction Power System: Short-Circuit Modeling

Battistelli, Luigi; Pagano, Mario; Proto, Daniela

doi:10.1109/tpwrd.2010.2100832

Cited by 63 publications

(39 citation statements)

References 18 publications

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“…With the boundary loading conditions known, the two unknowns in (12) are mainly coupled impedance XLCa and the operation voltage rating kinvaLC. Solving the expression for these two parameters yields the result in (14), which is the core equations for impedance-mapping Railway HPQC. Notice that subscript "_map" is added to signify that the parameters are determined by proposed impedance-mapping technique.…”

Section: A Proposed Impedance-mapping Design Techniquementioning

confidence: 99%

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Analysis in the Effect of Co-phase Traction Railway HPQC Coupled Impedance on Its Compensation Capability and Impedance-Mapping Design Technique Based on Required Compensation Capability for Reduction in Operation Voltage

Lao

Wong

Dai

et al. 2017

IEEE Trans. Power Electron.

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Railway hybrid power quality conditioner (HPQC) is one of the newly proposed devices for power quality compensation in co-phase high speed traction power supply for its benefit in reduction of operation voltage over conventional railway power quality conditioner (RPC). However, initial Railway HPQC design is developed based on minimum operation voltage at pre-defined fixed rated load. This may not be applicable in practical condition when load varies. In order to solve this problem, a Railway HPQC design with increased operation voltage has been investigated to enhance the compensation capability. Nevertheless, the compensation capability is even larger than that required during load variations such that the operation voltage is higher than it actually requires. A lower operation voltage can actually be used to provide required compensation capability when the coupled impedance is different from the designed rated one. In this paper, the effect of coupled impedance on the compensation capability in Co-phase Railway HPQC is being analyzed. An impedance-mapping design technique based on required compensation capability is then proposed based on the analysis. The proposed method is advantageous for lower operation voltage and smaller capacitance value. The effectiveness of impedance-mapping technique is verified via simulation and experimental results.Index Terms-Railway hybrid power quality conditioner, high-speed railway, power quality, co-phase traction power supply, impedance mapping Manuscript

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Section: A Proposed Impedance-mapping Design Techniquementioning

confidence: 99%

“…Most high-speed railway locomotives are electrified with 25 kV AC power [14].In order to overcome the locomotive limitation problems of existing high-speed traction power, the co-phase traction power is being introduced and studied in 2006 [15]. Shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Analysis in the Effect of Co-phase Traction Railway HPQC Coupled Impedance on Its Compensation Capability and Impedance-Mapping Design Technique Based on Required Compensation Capability for Reduction in Operation Voltage

Lao

Wong

Dai

et al. 2017

IEEE Trans. Power Electron.

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“…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]. If a TPSS does not have enough PSC, locomotives and EMUs would not be able to operate normally.…”

Section: Introductionmentioning

confidence: 99%

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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“…The harmonic resonance may cause serious voltage distortions [7], overvoltage problem with capacitive devices [8], and electro-magnetic interference (EMI) [9]. Considering the hub TSS feeding more railway lines, more and more trains running in the same power system will generate rich harmonic currents that may aggravate the harmonic resonance issue.…”

Section: Introductionmentioning

confidence: 99%

Harmonic Resonance Evaluation for Hub Traction Substation Consisting of Multiple High-Speed Railways

Gao

Shao

et al. 2017

IEEE Trans. Power Delivery

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1 -In many hub traction power supply systems (TPSS), the 27.5kV-busbars in the traction substation (TSS) have supplied several railway lines in a local area for reducing the number of TSSs. However, the multiple railway lines connected to the busbar may affect the resonance behaviors of the entire system. It's therefore needed to investigate the resonance behaviors under such hub TPSS conditions since the harmonic current collection of all railway lines will aggravate the resonance problem. Thus, resonance mode assessment and its sensitivity method is adopted for investigating the resonance behaviors of hub TPSS affected by different numbers of connected lines, lengths of supply lines, system capacities, etc. The numerical results of modal sensitivity indices are compared to investigate and quantify the harmonic resonance issue caused by multiple electrical railway lines. In addition, resonance frequency-shift technique and using modal impedance sensitivity index based method are also employed to mitigate the critical harmonic resonances. The results illustrate that it is effective to analyze resonance issues by adopting the harmonic model and modal methods in this paper. The two types of resonance behaviors (i.e. primary resonance and resonance band) caused from the hub TPSS have been fully investigated, and the resulted harmonic distortion of hub TPSS is suppressed.

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2$\,\times\,$25-kV 50 Hz High-Speed Traction Power System: Short-Circuit Modeling

Cited by 63 publications

References 18 publications

Analysis in the Effect of Co-phase Traction Railway HPQC Coupled Impedance on Its Compensation Capability and Impedance-Mapping Design Technique Based on Required Compensation Capability for Reduction in Operation Voltage

Analysis in the Effect of Co-phase Traction Railway HPQC Coupled Impedance on Its Compensation Capability and Impedance-Mapping Design Technique Based on Required Compensation Capability for Reduction in Operation Voltage

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

Harmonic Resonance Evaluation for Hub Traction Substation Consisting of Multiple High-Speed Railways

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