Optimized Design of Shed Parameters for Polluted Hollow Porcelain Insulators at High Altitude

Qiu, Zhixu; Sun, Yang; Cui, Yanjie; Zhang, Zhijin; Wang, Kun; Chen, X. I.; Wu, Yufan; Qi, Li; Lin, Wang; Lei, Z.

doi:10.1109/access.2023.3280027

Cited by 4 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The maximum operating phase voltage U m of the system can be obtained from the following equation [10]:…”

Section: Calculation Of Creepage Distancementioning

confidence: 99%

“…At present, the research on the external insulation of power equipment in high-altitude polluted areas worldwide mainly focuses on suspension insulators used in transmission lines [7][8][9][10][11][12][13]. Literature [7] studied the impact of the shape of the shed of the suspended insulator on the DC pollution flashover voltages at an altitude of 50 m and 4300 m, respectively, and the study showed that the pollution flashover voltages increase with the Energies 2024, 17, 1645 2 of 15 rise in the shed overhang, and then decrease slightly.…”

Section: Introductionmentioning

confidence: 99%

“…Literature [9] experimentally investigated the impact of various environmental factors on the saltwater deposition and flashover mechanism of composite suspension insulators in coastal areas, and the results showed that the rate of pollution accumulation on the insulator surface increases with the increase in wind speed and decreases with the increase in the distance from the coastline to the inland and that the flashover voltage of insulators is two to three times lower in rainfall than in a cold fog, and that the salt density affects the flashover voltage of the insulators, no matter what the wetting rate is. Literature [10] studied the impact of shed parameters of hollow porcelain insulators on pollution flashover characteristics in high-altitude areas through simulation and experiments and found that appropriately increasing the gap between sheds and reducing the overhang of large sheds could improve the surface electric field distribution of hollow porcelain insulators, thus improving their pollution flashover characteristics. Literature [11] studied the parameter optimization of the shed of high altitude DC UHV composite post insulator.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Research on Insulation Configuration of 220 kV Bushing in High-Altitude Polluted Areas

Zhang,

Xiao

et al. 2024

Energies

Self Cite

View full text Add to dashboard Cite

The external insulation strength of the power equipment sleeve in the substation and converter station will be reduced with the increase in altitude and atmosphere pollution. The weakness of external insulation seriously threatens the safe operation of electrical equipment. At present, there are few studies and conclusions that focus on the flashover characteristics of power equipment bushing in high-altitude polluted areas. Therefore, this paper takes the 220 kV voltage level bushing as the research object and studies the Alternating Current (AC) pollution flashover characteristics and lightning and switching impulse flashover characteristics at low pressure. The insulation configuration at high-altitude polluted areas is analyzed. Finally, the insulation configuration scheme, which is suitable for high-altitude polluted areas, is proposed. The results show that the AC pollution flashover voltages of the bushing decrease with the decrease in the atmospheric pressure and the increase in the salt density as a power exponent function. The impulse flashover voltages also decrease with the decrease in the atmospheric pressure as a power exponent function. The atmospheric pressure/pollution impact characteristic index is related to the type of voltage, the value of the atmospheric pressure, and the value of the salt density. The test bushing does not meet the insulation configuration requirements in some high-altitude polluted areas. Through the analysis and calculation of the test results, the bushing insulation configuration scheme in high-altitude polluted areas is proposed. The research results can provide a reference for the external insulation design of bushings in substations and converter stations in high-altitude polluted areas.

show abstract

“…The maximum operating phase voltage U m of the system can be obtained from the following equation [10]:…”

Section: Calculation Of Creepage Distancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on Insulation Configuration of 220 kV Bushing in High-Altitude Polluted Areas

Zhang,

Xiao

et al. 2024

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…Dong et al [14] established a mathematical model of pollution flashover voltage, and predicted the flashover voltage of insulators with a different shape and leakage distance. Qiu et al [15] performed an AC artificial pollution flashover test and discovered that increasing shed spacing can improve the insulator pollution flashover characteristics.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Natural Pollution Accumulation Characteristics of Insulators for Railroads in High-Altitude Environment

Zhang,

Chen,

Jiang

et al. 2023

Energies

Self Cite

View full text Add to dashboard Cite

Railway system insulators are affected by pollution, altitude, and other environmental situations during operation, which causes reduced electrical performance or even flashover accidents. These factors threaten the safety of railway operations in high-altitude areas. However, the natural contamination characteristics of a railroad in a plateau area is still unclear. In this study, a natural pollution accumulation test for railway insulators in a high-altitude area was carried out, and the distribution rules of nonsoluble deposit density (NSDD), equivalent salt deposit density (ESDD), NSDD/ESDD ratio, and nonuniformity (T/B) of the pollution distribution of the tested insulators were calculated. Meanwhile, the chemical compositions of the pollution from different test sites were analyzed. The differences of pollution accumulation between railway insulators and suspended insulators of a power system and the influencing factors were compared and analyzed by combining with a numerical simulation. The results show that the pollution level of railroad insulators is mainly distributed in level b and above. A pollution sample is mainly composed of sodium chloride, while the NSDD/ESDD ratio of pollution is mostly distributed from 0 to 5, with T/B value ranges from 1/0.62 to 1/1.76. The amount of insulator contamination is influenced by the location inside and outside the tunnel. Additionally, the pollution amount is influenced by the structure and type of insulators. Finally, this paper studies the creepage distance and structural height required by railway insulators in a plateau area according to the natural pollution accumulation characteristics of railway insulators, which can provide a reference for a railway electrical external insulation configuration in a high-altitude area.

show abstract

Waste electric porcelain-based refractory bricks with significantly enhanced mechanical properties: Preparation, characterization and mechanism

Cao,

Lv,

Zhang

et al. 2024

Ceramics International

View full text Add to dashboard Cite

Optimized Design of Shed Parameters for Polluted Hollow Porcelain Insulators at High Altitude

Cited by 4 publications

References 4 publications

Research on Insulation Configuration of 220 kV Bushing in High-Altitude Polluted Areas

Research on Insulation Configuration of 220 kV Bushing in High-Altitude Polluted Areas

Analysis of Natural Pollution Accumulation Characteristics of Insulators for Railroads in High-Altitude Environment

Waste electric porcelain-based refractory bricks with significantly enhanced mechanical properties: Preparation, characterization and mechanism

Contact Info

Product

Resources

About