Overview of Harmonic and Resonance in Railway Electrification Systems

Hu, Haitao; Shao, Yang; Tang, Li; Jin, Ma; He, Zhengyou; Gao, Shibin

doi:10.1109/tia.2018.2813967

Cited by 127 publications

(76 citation statements)

References 48 publications

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“…The structure of ACC is shown in Figure 4. (7) From Equations (6) and 7, the form of ∆ can be obtained: (8) Substituting (8) into (6), the relation between ∆ and ∆ is in Equation 9 (9)…”

Section: Of 19mentioning

confidence: 99%

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

et al. 2018

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To investigate the harmonic resonance, harmonic instability and low-frequency oscillation phenomena in high-speed railways, this paper proposes a full-frequency impedance model of the train-traction network system (simplified as 'train-network') based on d-q coordinates system. Compared with traditional models which deal with only the grid-side converter, the proposed model also includes its load models-the inverter and the traction motor. It also reflects complete control scheme of grid-side converter, which makes it easier to analyze unstable phenomena mentioned above. Moreover, this paper improves the impedance modeling of the network by taking the network impedance and admittance into detailed consideration. In addition, based on the proposed train-network model, the 3D figure and zero-pole diagram are also presented for the analysis of the stability of the integral system. Simulation and experiment results verify the accuracy of the model.

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Section: Of 19mentioning

confidence: 99%

“…The LFO is truly a power oscillation [5]. It mostly occurs when trains are in the rail depot with the pantographs rised, while the trains are just prepared for running [7]. In this case, the loads to grid-side converter are only the auxiliary inverter and the loads after it, such as air conditioners and the lighting system.…”

mentioning

confidence: 99%

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

et al. 2018

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“…With the wide application of the AC trains, huge economic benefits were gotten, but some new problems appeared [7][8][9], such as low frequency and high frequency oscillations of train-network coupling systems, which would hazard the lightning arrester, high voltage transformer, substation DC screen, and the RC branches of DC trains.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Control on High Frequency Resonance of Train-Network Coupling Systems

Zhang

Shang

Zhang

2019

Mathematical Problems in Engineering

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With the wide application of the electrified railway, high frequency resonances in train-network coupling system often occur, which not only affect the normal operation of trains but also seriously restrict the rapid development of electrified railway. However, the resonance mechanism has not been fully grasped and needs to be solved. First of all, this paper analyzed the new harmonic characteristics of mixed running of alternating current (AC) and direct current (DC) trains in electrified railway. Then, the mechanism of high frequency resonance and the burnout failure reason of the resistor connected with capacitance (RC) branch in the dc train were analyzed. Simulations were carried out to find some basic conclusions and rules. Subsequently, this paper reproduced and analyzed a real case of high frequency resonance accidents of train-network, burnout accident of RC branch of the dc train. Based on the above researches, optimized control methods to avoid the high frequency resonance were introduced. The achievement of this paper provides an important reference and theoretical basis for the comprehensive optimization and control of train-network coupling systems and the resonance suppression measures.

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“…Renewable energy sources (RESs) of solar and wind type are characterized by a non-predictable intermittency of power generation. When many RESs of these types contribute to the grid power, the uncertainty on their output power affects the power quality of the power system, with the occurrence of harmonics, voltage excursions, flickers, and even with the possible collapse of the power system [1,2]. An electric spring (ES) is a new power compensation device that provides a solution to the problem of grid power uncertainty.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Control with Fast Primary Control for Multiple Single-Phase Electric Springs

et al. 2019

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An electric spring (ES) is a new power compensation device which becomes useful for the large-scale integration of renewable energy sources into the grid. However, when the grid contains two or more ESs connected at different nodes, a voltage drop occurs between the nodes due to the line impedance. Therefore, the voltage of the ES-stabilized nodes cannot be set at the same reference (e.g., 220 V), otherwise one or more ESs break away because of the voltage windup. In this paper, a hierarchical control of multiple ESs tied to a microgrid is proposed to account for the line voltage drop. The primary control relies on the power decoupling control; it is designed for islanded operation of the microgrid, which improves the dynamics of both the voltage and frequency regulation. The secondary control relies on the droop control; it is introduced to coordinate the operation of the ESs by modifying the reference voltage of each ES dynamically. Advantages and disadvantages of the proposed hierarchical control are analyzed together with the explanations of the algorithms developed for its realization. At last, effectiveness of the arranged control system is validated by simulations on the MATLAB/Simulink platform.

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Overview of Harmonic and Resonance in Railway Electrification Systems

Cited by 127 publications

References 48 publications

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

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

Optimization and Control on High Frequency Resonance of Train-Network Coupling Systems

Hierarchical Control with Fast Primary Control for Multiple Single-Phase Electric Springs

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