A Method of Defect Diagnosis for Integrated Grounding System in High-Speed Railway

He, Zhengyou; Hu, Haitao; Huang, Wen; Pan, Yilin; Li, Xin; Yang, Jianwei

doi:10.1109/tia.2015.2425805

Cited by 7 publications

(6 citation statements)

References 13 publications

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“…l ij (12) where U i , U j , U i and U j are the potentials of adjacent nodes i and j of the grounding grid before and after corrosion under the same excitation, l ij is the distance between i and j (dimensionless value in meters).…”

Section: The Diagnosis Methods Of the Grounding Grid Corrosion Amentioning

confidence: 99%

“…The large grounding grid is buried in the soil about 0.8m deep underground, which is difficult to be excavated and replaced [11]. Therefore, it is of great engineering significance to predict the corrosion defects of the grounding grid through the accessible information above the ground surface to guide the operation and maintenance [12]- [15].…”

Section: Introductionmentioning

confidence: 99%

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A Diagnosis of Grounding Grid Corrosion Defects Based on Branch Voltage Disturbance

Dong

Shi

et al. 2020

IEEE Access

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The grounding grid is the cornerstone for maintaining the safe operation of the power system. The grounding network acts as a concealed project, and its invisible characteristics make the defects difficult to be detected, which causes major safety hazards in the system. Thus accurate diagnosis of grounding grid corrosion is vital in electrical engineering. A diagnosis method for grounding grid corrosion based on branch voltage disturbance is proposed in this paper, which can judge the location and degree of corrosion through branch voltage disturbance before and after corrosion. Firstly, the sensitivity of branch voltage to branch resistance of the grounding grid is analyzed. Secondly, a diagnostic model based on branch voltage disturbance is established, and the corresponding regularity between peak voltage disturbance and the corrosion state of the grounding grid branch is developed. Finally, it is verified by experiments that this method can effectively diagnose the corrosion of the grounding grid.

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Section: The Diagnosis Methods Of the Grounding Grid Corrosion Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Diagnosis of Grounding Grid Corrosion Defects Based on Branch Voltage Disturbance

Dong

Shi

et al. 2020

IEEE Access

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“…A low-frequency current source reduces the difficulty of power supply design. He [31] injected 50 Hz and 10 A current into high-speed railway grounding systems and realized the corrosion diagnosis of the grounding conductor through the sur face magnetic field. On the basis of the geophysical frequency-domain detection and dual-frequency induced polarization method, the dispersion characteristics of soil and proposed injecting double-frequency square wave current could be realized [32].…”

Section: Surface Electromagnetic Field Methodsmentioning

confidence: 99%

“…The research of corrosion detection is extensive. Corrosion detection technology of a substation grounding grid mainly includes the network method , electromagnetic field method [27][28][29][30][31][32][33][34][35], and electrochemical method [3,[36][37][38][39][40]. In recent years, emerging technologies, such as ultrasonic testing [41,42], electromagnetic pulse time difference location [43] and electromagnetic imaging [44][45][46][47][48][49], have been considered for corrosion detection.…”

Section: Introductionmentioning

confidence: 99%

Advances and Challenges of Corrosion and Topology Detection of Grounding Grid

Wang

et al. 2019

Applied Sciences

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The grounding device plays performs the role of releasing a lightning current and a fault current in the power system, and the corrosion of the conductor will cause damage to the grounding body, which threatens the safe operation of the power system. The grounding grid corrosion detection technology and equipment guarantee the safe operation of the power system. This paper discusses the research status of grounding corrosion and topological detection in detail and introduces the basic principles, research difficulties and existing problems of the methods such as the electric network method, electromagnetic field method, electrochemical method, ultrasonic detection method and electromagnetic imaging method. The methods of electromagnetic imaging and time difference positioning proposed in recent years have been also discussed in detail. The paper points out that the application of grounding grid corrosion detection distance engineering still faces great challenges and that multi-disciplinary, multi-information fusion, new sensing technology, big data platforms and intelligent computing will be the trends to follow in research on grounding grid fault, corrosion detection and life prediction.

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“…With time, researchers have developed different methods to monitor grounding grid conditions without excavation. Among these methods, the most effective ones include electromagnetic [8], [9], [10], [11], [12], resistive network [13], [14], [15], and electrochemical methods [16], [17]. In [8], the grounding grid's robustness was investigated by analyzing the equivalent resistivity distribution using the transient electromagnetic method (TEM).…”

Section: Introductionmentioning

confidence: 99%

Assessing Grounding Grid Robustness Through Analysis of Static Fields

Qamar,

Khan,

Behram

et al. 2023

IEEE Access

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Assessing the condition of a grounding grid is key to ensuring the safety of a substation and the personnel working in its vicinity. This paper analyzes the static fields of a grounding grid to evaluate its robustness. The proposed method calculates the resistance of a grounding grid by considering the magnetic field generated by the grounding conductor at the earth's surface and the electric field inside the conductor. By comparing the calculated resistance values of the grid conductors with the designed values, the robustness of the grounding grid is evaluated. The error achieved by this method is 2.46%. Unlike existing methods, such as optimization and the gradient method, the proposed method does not require tedious calculations and is immune to noise induction. This is demonstrated through a comparison with one of the latest research studies. The feasibility and accuracy of the proposed approach in evaluating the robustness of a grounding grid are discussed. Furthermore, the results are supported by the mathematical reasoning and simulation results.INDEX TERMS Electric field, grounding grid, magnetic flux density, robustness.

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A Method of Defect Diagnosis for Integrated Grounding System in High-Speed Railway

Cited by 7 publications

References 13 publications

A Diagnosis of Grounding Grid Corrosion Defects Based on Branch Voltage Disturbance

A Diagnosis of Grounding Grid Corrosion Defects Based on Branch Voltage Disturbance

Advances and Challenges of Corrosion and Topology Detection of Grounding Grid

Assessing Grounding Grid Robustness Through Analysis of Static Fields

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