Integrated Full-Frequency Impedance Modeling and Stability Analysis of the Train-Network Power Supply System for High-Speed Railways

Zhang, Xinyu; Wang, Lei; Dunford, W.G.; Chen, Jie; Liu, Zhigang

doi:10.3390/en11071714

Cited by 7 publications

(3 citation statements)

References 21 publications

(37 reference statements)

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“…Therefore, the dq-frame impedance of the PWM converter is (16) According to (16), Z i is a 2 × 2 diagonal matrix due to the dq-decoupling method applied into a single-phase control strategy (not the dq-frame control strategy). Also, to achieve a unity power factor, it is recommended to set q-axis current reference of the PWM converter of the locomotive to zero.…”

Section: Impedance Model Of Locomotivesmentioning

confidence: 99%

See 1 more Smart Citation

Assessing High-Order Harmonic Resonance in Locomotive-Network Based on the Impedance Method

Wang

Molinas

et al. 2019

IEEE Access

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Many new types of locomotives are put to use in electric railway systems, resulting in instability problems such as high-order harmonic resonance occurring as a consequence of the interaction between the electrical locomotive (including electrical multiple units) and the traction network. In order to investigate this problem, this paper adopts the impedance-based approach to analyze the stability properties of the system interaction. The detailed impedance of the traction network is obtained by taking its distributed parameters into account. Then the locomotive converter with single-phase transient current control algorithm (TCCA), which can represent the locomotive when performing the impedance-based stability analysis, is modeled as the dq-frame impedance by single-phase dq decomposition. By plotting bode diagrams of the impedance for the traction network and the locomotive separately, and calculating the phase margin at the intersection point of the magnitude of the two impedances, the stability of the locomotive-network system is evaluated and thus the high-order harmonic resonance can be predicted. Moreover, a time-domain model of locomotivenetwork systems is established in this paper, which can reproduce the high-order harmonic resonance in the time domain as a first validation step of the analysis. Finally, a field test in a traction substation of the Beijing-Harbin Railway is carried out to finally validate the effectiveness of the proposed method. The stability analysis method in this paper is simple and effective without the need for a complex calculation of some norms or Eigenvalues. As a result, the high-order harmonic resonance can be predicted before a new type of locomotive is put into use.

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Section: Impedance Model Of Locomotivesmentioning

confidence: 99%

“…In addition, the influence of controller parameters on system stability is discussed. Thereafter, different suppression methods are proposed to mitigate the instability phenomena [2], [16], but these measures could not completely resolve the instability problems of all the different L-N systems.…”

Section: Introductionmentioning

confidence: 99%

Assessing High-Order Harmonic Resonance in Locomotive-Network Based on the Impedance Method

Wang

Molinas

et al. 2019

IEEE Access

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“…The model of the train has been thoroughly introduced in our paper [13], so only the conclusions that are needed by this paper are listed here as follows. The main transmission system structure diagram in the train is shown in Figure 2.…”

Section: The Impedance Model Of the Train-network System A The Impedance Model Of The Train Power Systemmentioning

confidence: 99%

VCT-AOC Comprehensive Method to Suppress High-Frequency Resonance and Low-Frequency Oscillation in Railway Traction Power Supply System

et al. 2019

Self Cite

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Aiming at the high-frequency resonance (HFR) and low-frequency oscillation (LFO) phenomena in high-speed railways, a comprehensive suppression method named voltage constant transient active oscillation compensation (VCT-AOC) is proposed. This method is optimized on the basis of AOC, and the adjustment time is shortened by the VCT suppression measure. When serious HFR happens, the system can be quickly restored and stabilized by completely removing the network voltage oscillation in the control part, thereby avoiding the transient overvoltage and overcurrent damage to the system. According to the characteristics of AOC and VCT, the VCT-AOC comprehensive suppression method is proposed, and the specific implementation scheme of this method is given. This paper established the train-network impedance model with AOC and VCT suppression methods. The Generalized Nyquist Analysis (GNA) method and the dominant pole analysis method are used to analyze the effect of VCT and AOC on the system. Finally, the effectiveness of suppression methods is verified by simulations and experiments. INDEX TERMSVoltage constant transient active oscillation compensation, high-frequency resonance, lowfrequency oscillation, suppression method, train-network power supply system.

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Low-Frequency Oscillation Research of Sichuan-Tibet Railway Under Bilateral Power Supply for Mixed Passenger and Freight Locomotives Operation

Meng

Deng

et al. 2022

Proceedings of the 5th International Conference on Electrical Engineering and Information Technologies for Rail Transportation

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Integrated Full-Frequency Impedance Modeling and Stability Analysis of the Train-Network Power Supply System for High-Speed Railways

Cited by 7 publications

References 21 publications

Assessing High-Order Harmonic Resonance in Locomotive-Network Based on the Impedance Method

Assessing High-Order Harmonic Resonance in Locomotive-Network Based on the Impedance Method

VCT-AOC Comprehensive Method to Suppress High-Frequency Resonance and Low-Frequency Oscillation in Railway Traction Power Supply System

Low-Frequency Oscillation Research of Sichuan-Tibet Railway Under Bilateral Power Supply for Mixed Passenger and Freight Locomotives Operation

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