The Mitigation Technology of Typical Low-Frequency Voltage Fluctuation in China Electrified Railway

Jiang, Xiaofeng; Hu, Haitao; Yang, Jie; Zhou, Yi; He, Zhengyou; Qing-quan, Qian; Tricoli, Pietro; Hillmansen, Stuart; Roberts, Clive

doi:10.1109/speedam.2018.8445197

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…The solutions in terms of LFO mitigation can be categorized into mitigation methods looking at the power supply system side, and methods looking at the train side [7]. For the the power supply side, [13,17] propose either the installation of voltage stabilizers in the substations or the capacity upgrade of traction transformers . Other works propose the use of active compensators added in substations in a way similar to the methods used to suppress LFO in power systems [18].For the train side, [13] mainly considers the influence on stability of train number and control.…”

Section: B Literature Reviewmentioning

confidence: 99%

Analysis and Adaptive Mitigation Scheme of Low-Frequency Oscillations in AC Railway Traction Power Systems

Jiang

Yang

et al. 2019

IEEE Trans. Transp. Electrific.

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The diffusion of modern electric trains equipped with high-power voltage-source converters has introduced new dynamic interactions with the traction power system that may create unexpected low-frequency oscillations . This paper presents for the first time a detailed analysis of the operating condition of electric trains and traction network, revealing that specific changes of the operating conditions of the train-network system are responsible for the oscillations and may lead to instability.The study is carried out with an analytical dynamic model considering the transient direct current control and focusses on understanding how the mismatch between the actual parameters of the train-network syste and those used by the controller affects system dynamic and stability. It is shown that the retuning of controller parameters improves the dynamic performance of the train-network system, and hence an adaptive control is proposed to mitigate low frequency oscillations with minimal change and cost to the original system. Simulation and experimental results are presented in the paper to fully validate the proposed control method.

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Section: B Literature Reviewmentioning

confidence: 99%

Analysis and Adaptive Mitigation Scheme of Low-Frequency Oscillations in AC Railway Traction Power Systems

Jiang

Yang

et al. 2019

IEEE Trans. Transp. Electrific.

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“…Moreover, the parameter design of this method has some difficulties [10]. In order to reduce the impedance of the traction network, literature [11] proposed a method. The original transformer of the substation is replaced by a transformer with a larger capacity and a smaller shortcircuit voltage.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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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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Stability Analysis of Low-Frequency Oscillation in Train-Network System Using RLC Circuit Model

Hong

Shuai

Cheng

et al. 2019

IEEE Trans. Transp. Electrific.

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The Mitigation Technology of Typical Low-Frequency Voltage Fluctuation in China Electrified Railway

Cited by 4 publications

References 6 publications

Analysis and Adaptive Mitigation Scheme of Low-Frequency Oscillations in AC Railway Traction Power Systems

Analysis and Adaptive Mitigation Scheme of Low-Frequency Oscillations in AC Railway Traction Power Systems

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

Stability Analysis of Low-Frequency Oscillation in Train-Network System Using RLC Circuit Model

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