Measurement and simulation on low-frequency oscillation in the traction network of Xuzhou North Railway Hub

Li, Jing; Wang, Mingli; Liu, Qiujiang

doi:10.1109/wcica.2016.7578509

Cited by 10 publications

(5 citation statements)

References 3 publications

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“…Inserting (9) and (12) into (11), equation (11) becomes into another form: i = G ie e + G iref i ref (13) where I am the 2 × 2 identity matrix, For an ideal voltage source rectifier (VSR), the power is balanced between the AC-side and the DC-side of the H-bridge. Accordingly, for occasions of rated power, the reference of the ACC can be obtained based on the small-signal method…”

Section: Impedance Model Of Locomotivesmentioning

confidence: 99%

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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%

“…The stability of the L-N system has been investigated to some extent. Some research presents the instability phenomena through an analysis of field test data [11]. In [12], the time-domain model of the L-N system is established in order to simulate the instability problems.…”

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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“…It is hard to know the direct reason for the low-frequency voltage fluctuations, where this topic did not take enough attention by the researchers. However, the fluctuations, in fact, could appear as a complicated locomotive-grid interaction problem [8], [9], and they have been noted worldwide in a variety of AC locomotives and at different operating conditions. According to the published literature, this phenomenon was first noted in a Norwegian railway, where the rotary converters were used in the TPS substations.…”

Section: Low-frequency Voltage Fluctuationsmentioning

confidence: 99%

“…The fluctuations have been distinguished later in Germany, Switzerland, France, China and USA. The problem in France and China occurred due to the same reasons, in which many electric locomotives were totally under a standstill state in the railway stations with only the auxiliary load powered by the DC-link of the AC/DC/AC converters [8]. A study has been performed in [9] on a traction substation in China that extremely suffered from the low-frequency voltage fluctuations.…”

Section: Low-frequency Voltage Fluctuationsmentioning

confidence: 99%

Power quality phenomena in electrified railways: Conventional and new trends in power quality improvement toward public power systems

Tanta

Monteiro

Sousa

et al. 2018

2018 International Young Engineers Forum (YEF-ECE)

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Nowadays, railway electrification is the most efficient way to power the trains. However, power quality (PQ) phenomena toward public power systems (PPSs) have always a main concern to the railway operators, especially when the single-phase traction power system is interconnected to the three-phase PPS. The last decades have witnessed an on-going evolution of PQ improvement and traction power supply systems, contributing to diminish the negative impacts of AC railway networks on PQ of the three-phase PPS. In this context, this paper presents a global overview of the PQ phenomena in AC railway electrification, as well as the impacts of the potential hazards on the safe operation of electrified railways. The paper also reviews PQ improvement methods from the early use of AC railway electrification until the emergence of the new power electronics devices in railways industry.

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“…As the strengthening of the grid structure, the obvious oscillation events are relatively decreased, and identification after the accident goes against the grid forewarning and precontrol. Actually, there exists active power impact caused by traction load [9], smelting load, and reactive mutation due to capacitor or reactor switching. These power mutations tend to cause small oscillation of the adjacent unit which inspire relatively weak damping mode in the grid.…”

Section: Introductionmentioning

confidence: 99%

Oscillation Mode Information Identification of Power System Based on Daily Small Disturbances

Mei¹,

Wang²,

Huang³

2018

dteees

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A large number of disturbances of power mutations of units or load exist in power system in daily operation, which may inspire the grid interval mode oscillations within a narrow range. Some units' power-angle and power dynamic measurement include part of oscillation information which can be identified by using appropriate identification methods to forewarn and preventively control low frequency oscillation. This paper chose common methods, Prony and ARMA, to identify and analyze the oscillation information, based on the characteristics of slight oscillation of power system due to small disturbance, comparing noise immunity of the two algorithms in varied noise disturbance situations. Then it compares the feasibility of the two algorithms in conspicuous and inconspicuous oscillation cases according to WAMS measured data of actual grid.

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Measurement and simulation on low-frequency oscillation in the traction network of Xuzhou North Railway Hub

Cited by 10 publications

References 3 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

Power quality phenomena in electrified railways: Conventional and new trends in power quality improvement toward public power systems

Oscillation Mode Information Identification of Power System Based on Daily Small Disturbances

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