Power-Quality Impact Assessment for High-Speed Railway Associated With High-Speed Trains Using Train Timetable—Part I: Methodology and Modeling

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 Harmonic pollution of traction power supply system (TPSS) has become a vital concern for its adverse impacts on the tractive drive system of the train and power quality issues of both TPSS and connected power system. Harmonic modeling is the precondition to evaluate the harmonic pollution for TPSS. This paper systematically discusses main harmonic sources in TPSS as well as their characteristics based on accurate field measurement. Moreover, the background harmonic voltage of the connected utility system and the harmonic of the train are compartmentalized and modeled with consideration of the stochastic and statistical features. This paper studies the background harmonic voltage with time slicing and probability statistics technique. Meanwhile，the harmonic of the train is described with Norton equivalent model, which considers the interaction between harmonic voltage and harmonic current. Moreover, the influence of the working conditions and power output on the harmonic distribution is mentioned in the low-order harmonic modeling of the train. The results suggests the proposed methods can effectively restore the distribution and characteristics of the harmonics in TPSS.Index Terms-harmonic modeling, traction power supply system, stochastic and statistical features, compartmental modeling, field data.

Section: B Literature Reviewmentioning

confidence: 99%

Section: A Norton Equivalent Modelmentioning

confidence: 99%

Measurement-Based Compartmental Modeling of Harmonic Sources in Traction Power-Supply System

Gao

et al. 2017

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“…In a companion paper [1], we have described the dynamic behavior modeling of high-speed trains and traction network as well as the rest of the TPSS.…”

Section: B Challenges and Literature Reviewmentioning

confidence: 99%

“…The objective of this paper is to implement the results from the detailed DF/HPF method presented in the companion paper [1] for evaluating comprehensive PQ issues in China HSR. The contributions of this paper are listed as follows.…”

Section: Contributionsmentioning

confidence: 99%

Power-Quality Impact Assessment for High-Speed Railway Associated With High-Speed Trains Using Train Timetable—Part II: Verifications, Estimations and Applications

et al. 2016

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This paper investigates the voltage profiles and harmonic impacts of high-speed trains on both traction power supply system (TPSS) and primary utility system. Power quality (PQ) assessment has become not only a computing tool for TPSS design and planning, but also an indispensable technique for utilities to estimate the accurate PQ impacts from the railway systems. Therefore, to achieve comprehensive PQ assessment in TPSS, a dynamic fundamental / harmonic power flow (DF/HPF) method is developed in a companion paper, while further application of the technique is described in this paper. The fundamental and harmonic results calculated in a 24-hour period such as loading levels, voltage profiles, unbalance, power loss and harmonic distortions have been computed. In addition, the statistical measured background harmonics of the utility system are represented by Weibull function and also considered in the harmonic evaluation. The unbalance and harmonic impacts are investigated and checked with national standards in the paper. The proposed method can be effective for excavating and predicting the potential serious PQ problems existing in the TPSS by using a train timetable. 0885-8977 (c)

“…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

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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.