Neutral section passing strategy preventing inrush current for electric railway solid-state transformers

Bu, Hanyoung; Lee, Yejun; Cho, Younghoon; Kim, Myung-Yong; Lee, Eunsoo; Park, Jin-Hyuk

doi:10.1007/s43236-021-00261-5

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…If the load reactive power cannot be ignored, ∆T should be modified according to the load power factor as shown in (14).…”

Section: δT =mentioning

confidence: 99%

“…The gap time is typically within 130-300 ms for vacuum circuit breakers, and within 5-30 ms for static switches. This leads to the occurrence of various electromagnetic transient phenomena, including transient overvoltage and train's inrush current [12][13][14]. Most studies concentrate on the ANS system's working principles and train position detection, but there are few studies on the suppression of the transient overvoltage and inrush current.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electromagnetic transient suppression for thyristor switch‐based auto‐passing neutral section system

Liran,

Mingli,

Qiujiang

et al. 2023

IET Power Electronics

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The auto‐passing neutral section (ANS), applied in the traction substation or section post (SP), is one of the effective methods to improve the continuity of power supply, and the electromagnetic transient is the key issue impacting its application value. An equivalent switching circuit is established to reveal the causes of the electromagnetic transient. The suppression methods for reducing transient overvoltage and inrush current are proposed, adopting an improved RLC filter to suppress the transient overvoltage with low active power loss, and a switching strategy to minimize magnetic flux variation. The correctness of the proposed methods has been confirmed by simulation and experimental results, which can improve the transient performance and increase the practicality of the ANS.

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“…If the load reactive power cannot be ignored, ∆T should be modified according to the load power factor as shown in (14).…”

Section: δT =mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electromagnetic transient suppression for thyristor switch‐based auto‐passing neutral section system

Liran,

Mingli,

Qiujiang

et al. 2023

IET Power Electronics

View full text Add to dashboard Cite

show abstract

“…When the electric locomotive passes the neutral-section, there will be a complex electromagnetic transient process. When the electric locomotive adopts manual or on-board automatic passing, the on-board transformer may produce a large inrush current when it is closed without load, causing the voltage and current of the vehicle-grid coupling system to oscillate [5][6][7]. This will cause train traction blockade and feeder protection malfunction of traction substation, which seriously affects train operation safety [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Research on Transient Low-Frequency Oscillation of Electrified Railway Vehicle-Grid Coupling System

Cao

et al. 2023

IEEE Access

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At the moment of electric locomotive passing the neutral-section, the voltage and current of traction network may have low-frequency oscillation (LFO), which will seriously affect the safe operation of the railway. Aiming at eliminating LFO, a modeling method of vehicle-grid coupling system based on flux-current theory is presented in this paper. In the model of electric locomotive, the transient current control strategy and magnetic saturation of on-board transformer are considered, and the equivalent model of excitation inductance of on-board transformer is established based on the flux-current theory. Using this model, based on the Middlebrook impedance ratio criterion, the stability region of vehicle-grid coupling system is analyzed under the influence of average saturation of on-board transformer and control parameters of electric locomotive. Simulation results and analysis are established to evaluate and verify the proposed modeling method of LFO. This work has the benefits of defining the opening and closing phase angle region of system stability as well as providing guidance to adaptively modify the control parameters to suppress the LFO.

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Analysis on Electrical Characteristics of Interconnected Power Supply System of Traction Substation Group

Han,

Wang,

Zhang

et al. 2024

Lecture Notes in Electrical Engineering

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Neutral section passing strategy preventing inrush current for electric railway solid-state transformers

Cited by 4 publications

References 11 publications

Electromagnetic transient suppression for thyristor switch‐based auto‐passing neutral section system

Electromagnetic transient suppression for thyristor switch‐based auto‐passing neutral section system

Research on Transient Low-Frequency Oscillation of Electrified Railway Vehicle-Grid Coupling System

Analysis on Electrical Characteristics of Interconnected Power Supply System of Traction Substation Group

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