Electric Field Simulation of Polluted Insulator on EMU Roof

Jia, Buchao; Liang, Shuang; Zhang, Qizhe; Chang, Bo Tao; Wang, Shenghui

doi:10.1109/scems48876.2020.9352435

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…The contaminant analyzed is salt water [7][8][9]. In addition, several studies have conducted FEM simulations to determine the effect of contaminants on insulators [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. However, most of these studies only analyzed polymeric insulators against certain types of contaminants, such as ice [12], salt water [16,17], and water [20][21][22].…”

Section: Investigation Of Insulator Performance Under Artificial Cont...mentioning

confidence: 99%

Investigation of Insulator Performance Under Artificial Contaminants

Negara,

Asfani,

Hernanda

et al. 2023

IJIE

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There are three types of insulators, namely glass, ceramic, and polymer. Although polymers have hydrophobic properties that make them superior to other materials. However, in its application, ceramic and glass insulators are still used because they are cheaper. Environmental conditions around the work location of the insulator greatly affect its performance. Areas with high levels of pollution will result in the insulator being damaged quickly. The effect of seawater and fly-ash contaminants on the three types of insulators is discussed in this study. Experimental approaches and FEM-based simulations have been carried out. Pollution levels in seawater contaminants were standardized using ESDD. Meanwhile, the level of pollution in fly-ash contaminants is standardized using NSDD. Simulations and experiments were carried out at four levels of contamination, namely light, medium, heavy and very heavy. Then the simulation and test results are compared. The greater the ESDD and NSDD values, the greater the leakage current.

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Section: Investigation Of Insulator Performance Under Artificial Cont...mentioning

confidence: 99%

Investigation of Insulator Performance Under Artificial Contaminants

Negara,

Asfani,

Hernanda

et al. 2023

IJIE

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show abstract

“…By the end of 2020, the mileage of China's high-speed railways has reached 37,900 km. Since silicone rubber composite insulators have good hydrophobicity, they are widely used in railway contact lines and electric locomotive roofs [1][2][3][4]. With the continuous expansion of the coverage of high-speed railways, the composite insulators on the roof of trains that run across multiple areas of different meteorological environments need to withstand more stringent tests.…”

Section: Introductionmentioning

confidence: 99%

Influence of Sheath Radial Crack on Flashover Arc and Leakage Current of Roof Silicon Rubber Insulator for High-Speed Train

Wang

Zhang

et al. 2022

IEEE Access

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In this paper, three types of insulators with no crack, short crack, and long crack are taken as the research objects to evaluate the influence of the penetrating cracks on the 1 st sheath of the roof silicone rubber composite insulator of high-speed train on the flashover characteristics. The continuous voltage rising method is used to obtain the influence characteristics of the crack on the development process of the flashover arc. The constant voltage withstand method is adopted to compare the leakage current when the contamination degree is 0.1 mg/cm 2 . The test results demonstrate that the crack has no significant effect on the flashover voltage and flashover path, and the flashover arc can burn the edge of the crack. The peak leakage current of the three different tests ranges from 24 mA to 30 mA. Additionally, the development of leakage current can be divided into four stages: rising, continuous violence, falling, and oscillating. Moreover, the sequence of the apparent leakage current of the insulator is long crack insulator, short crack insulator, and the one with no crack. The acceleration of the rising stage of the leakage current increases with the increase in the crack length. Meanwhile, the sum of the time of the rising stage, continuous stage, and falling stage of the insulator with long crack is the smallest. The crack will distort the distribution of current density and the electric field intensity in the vicinity. The results can provide references for evaluating the influence of radial cracks at the edge of the sheath on the flashover characteristics and optimizing the design of the roof insulator sheath structure.INDEX TERMS high-speed train, roof insulator, radial fissure, electric arc, leakage current

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“…With the coverage of high speed railway networks in expansion, the operating environment of high-speed train has been made increasingly complex. Such exceptional meteorological conditions such as rain, snow, sand and high altitude can have an immediate impact on the stable operation of external insulation equipment fitted on the top of high-speed train [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Optimization for Grading Rings of High-Speed Train Roof Post Insulator

Wang

et al. 2021

IEEE Access

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In order to exercise control on the maximal intensity of electric field for the pantograph post insulators and fittings surface on high-speed trains, the finite element software COMSOL was applied to analyze the electric field distribution of post insulators in the presence and absence of the grading ring. According to the simulation results, the depth and degree of grading ring are the significant influencing factors in the distribution of electric field along the insulator surface and the surrounding air area. Based on these simulation results, the solid model was processed and the lightning impulse flashover voltage test was carried out. As indicated by the test results, the permissible lightning impulse voltage of 50% negative polarity exhibited a linear relationship with the depth value, while 50% of the permissible lightning impulse voltage generated with the addition of grading ring cover that was 70mm in depth satisfied the requirement of 170kV as specified in OV4 standard. Based on the results of simulation analysis and test, the parameters of the grading ring that can be applied in engineering works were identified in this paper, thus providing a reference for the adoption of the scheme to reduce the abnormal flashover frequency induced by the local high intensity electric field.INDEX TERMS high-speed train, roof composite insulator, grading ring, lightning impulse voltage, electric field distribution

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Electric Field Simulation of Polluted Insulator on EMU Roof

Cited by 7 publications

References 3 publications

Investigation of Insulator Performance Under Artificial Contaminants

Investigation of Insulator Performance Under Artificial Contaminants

Influence of Sheath Radial Crack on Flashover Arc and Leakage Current of Roof Silicon Rubber Insulator for High-Speed Train

Optimization for Grading Rings of High-Speed Train Roof Post Insulator

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