A Novel Controlled Frequency Band Impedance Measurement Approach for Single-Phase Railway Traction Power System

Hu, Haitao; Pan, Pengyu; Song, Yitong; He, Zhengyou

doi:10.1109/tie.2019.2896297

Cited by 60 publications

(25 citation statements)

References 29 publications

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“…If we want to calculate the harmonic contribution of each side accurately, the customer side harmonic impedance cannot be ignored anymore. To quantify the effect of Z c on the harmonic contribution assessment, we illustrate the relative errors of customer side harmonic emission level as shown in Equation (4) by Equations (2) and (3).…”

Section: Harmonic Emission Level Estimated Error Of Traditional Methodsmentioning

confidence: 99%

“…With the innovation of power electronic technology, power electronic converters are widely used in many industrial fields, such as the grid-connected system of renewable energy, 1 HVDC, 2 and electrical traction railway systems. 3 Harmonic pollution is inevitably brought into the power grid, which threatens the security and stability of the power system, increases the energy loss, leads to line overheating, and results in harmonic resonance. 4 Limiting harmonic emissions from these harmonic pollution sources has become a common industry practice.…”

Section: Introductionmentioning

confidence: 99%

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An impedance matrix constrained‐based method for harmonic emission level estimation

Zheng

Xiao

Wang

2020

Int Trans Electr Energ Syst

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Summary The harmonic impedances are important for both utility companies and their customers. The data have many uses, such as estimating harmonic emission levels, designing filters. Complex independent component analysis is a well‐accepted method for harmonic impedance estimation. However, a lack of data points for each calculation leads to wrong results. To increase the feasibility of this method, we proposed a constrained complex independent component analysis‐based method by adding the essential feature of the harmonic impedance matrix. Thus, the recovered source signals, which are highly consistent with the original source signals can be found when the data quantity for each calculation is little. The method has been verified using simulation studies and extensive field data. The results show that the proposed method can serve as a useful tool to support the harmonic impedance calculation task of utility companies and their customers.

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Section: Harmonic Emission Level Estimated Error Of Traditional Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An impedance matrix constrained‐based method for harmonic emission level estimation

Zheng

Xiao

Wang

2020

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

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“…Therefore, it is necessary to provide more realistic values based on industrial applications based and specifications for the ac grid-converter system [76,77]. Moreover, accurate train-network impedance measurements [31,78] will facilitate the impedance identification process and further development of related standards.…”

Section: ) Electric Trainsmentioning

confidence: 99%

Low-Frequency Oscillation in Electric Railway Depot: A Comprehensive Review

Zhou

et al. 2021

IEEE Trans. Power Electron.

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The wide adoption of a new type of electric trains results in multiple frequency-scale instability problems, such as low-frequency oscillation (LFO), harmonic resonance and harmonic instability. Among them, LFO has been commonly reported at electric railway depots with multiple-energized electric trains around the whole world, thus attracting widespread research attention. LFOs cause adverse effects on the system stability and protection infrastructure of both the traction network and electric trains. This paper presents a comprehensive review of LFOs that consider both academic theoretical analysis and industrial engineering requirements. A unified mathematical model of the traction network and electric train is derived with a view to revealing the mechanism and factors that induce LFOs when these two systems interact. The study also draws deep insights from results of experimental measurements and industrial mitigation schemes already implemented in Chinese railway systems. A variety of mitigation techniques and recommendations based on theoretical principles and practical constraints are presented.

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“…As shown in Fig. 5, the impedance frequency characteristic curve can be obtained by (11). The working principle of NHPF is discussed by the combination of (11) and Fig.…”

Section: A Structure and Working Principle Of The Novel Hpfmentioning

confidence: 99%

“…Research on the resonance of electrified railways mainly focuses on the occurrence mechanism and influencing factors, where the primary methods are online measurement [10,11], simulation model analysis [9,12,13] and mathematical analysis [14][15][16]. Reference [10] proposes an online identification method, and reference [11] uses a butterflytype disturbance circuit and a chirped-pulse-width-modulated signal model to propose a controlled wide-bandwidth impedance measurement. Based on the multi-transmission line theory [12], references [9] and [13] established a detailed simulation model of the TPSS, and impedance frequency characteristics and harmonic amplification features are analyzed under various conditions.…”

Section: Introductionmentioning

confidence: 99%

Research on the Harmonics Penetration Characteristics of the Traction Network to Three-Phase 380 V Power System of the Traction Substation and Suppression Scheme

et al. 2020

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To reveal the penetration characteristics of high-frequency harmonics of the traction network to the three-phase 380 V power system in the traction substation (TSS), the harmonic equivalent circuit model and harmonic penetration mathematical model of the two-phase to three-phase Scott-T transformer are established. Through the power quality measurement and harmonic analysis, the results indicate that the high-frequency harmonics in the traction network will severely penetrate the three-phase 380 V power system, which will cause almost the same degree of harmonic distortion, verifying the correctness of the harmonic penetration model. To filter high-frequency harmonics in TSS, a novel structure of high-pass filter (HPF) is proposed that features with high-pass characteristic at high frequencies while highimpedance at fundamental frequency. Furthermore, a set of three-phase experimental device is developed, and a long-term filtering experiment in the TSS is performed. The experimental results show that the novel HPF experimental device can effectively filter out high-frequency harmonics of the three-phase 380 V power system, and have almost no loss and reactive power. The feasibility and effectiveness of the suppression scheme based on the novel HPF are verified.

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A Novel Controlled Frequency Band Impedance Measurement Approach for Single-Phase Railway Traction Power System

Cited by 60 publications

References 29 publications

An impedance matrix constrained‐based method for harmonic emission level estimation

An impedance matrix constrained‐based method for harmonic emission level estimation

Low-Frequency Oscillation in Electric Railway Depot: A Comprehensive Review

Research on the Harmonics Penetration Characteristics of the Traction Network to Three-Phase 380 V Power System of the Traction Substation and Suppression Scheme

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