The impact of cap orientation on mechanical strength of high voltage devices and a novel design for improvement

Rabelo, Matheus; Kim, Tae-Yong; Sanyal, Simpy; Kim, Keekeun; Seok, Chang-Sung; Choi, In Sil; Yi, Junsin

doi:10.1007/s40430-022-03364-7

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…Previous studies have extensively examined the properties of insulators from various perspectives, including electrical and dynamic characteristics [27][28][29][30][31][32][33]. However, a notable research gap exists regarding the investigation of stress distribution within insulator components under ultimate loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Study on the Ultimate Load Failure Mechanism and Structural Optimization Design of Insulators

Ji,

Li,

Cao

et al. 2024

Materials

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This study aims to enhance the productivity of high-voltage transmission line insulators and their operational safety by investigating their failure mechanisms under ultimate load conditions. Destructive tests were conducted on a specific type of insulator under ultimate load conditions. A high-speed camera was used to document the insulator’s failure process and collect strain data from designated points. A simulation model of the insulator was established to predict the effects of ultimate loads. The simulation results identified a maximum first principal stress of 94.549 MPa in the porcelain shell, with stress distribution characteristics resembling a cantilever beam subjected to bending. This implied that the insulator failure occurred when the stress reached the bending strength of the porcelain shell. To validate the simulation’s accuracy, bending and tensile strength tests were conducted on the ceramic materials constituting the insulator. The bending strength of the porcelain shell was 100.52 MPa, showing a 5.6% variation from the simulation results, which indicated the reliability of the simulation model. Finally, optimization designs on the design parameters P1 and P2 of the insulator were conducted. The results indicated that setting P1 to 8° and P2 to 90.062 mm decreased the first principal stress of the porcelain shell by 47.6% and Von Mises stress by 31.6% under ultimate load conditions, significantly enhancing the load-bearing capacity. This research contributed to improving the production yield and safety performance of insulators.

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Section: Introductionmentioning

confidence: 99%

Study on the Ultimate Load Failure Mechanism and Structural Optimization Design of Insulators

Ji,

Li,

Cao

et al. 2024

Materials

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“…Outdoor high-voltage insulators should have high dielectric strength, regardless of the weather. Power utility records show that poor insulation is responsible for almost 70% of high-voltage line failures. − Several factors may cause electrical failures at the surface of insulating materials, such as flashover and surface degradation caused by thermal corona discharges, contamination, and progressive small arcs.…”

Section: Introductionmentioning

confidence: 99%

Sprayable Superhydrophobic Polydopamine-Modified Oleic Acid/Nanoscale SiO₂Composites for Insulator Protective Coatings

Sanyal

Dhungel

Pham

et al. 2023

ACS Appl. Nano Mater.

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Failures of porcelain insulators due to ice formation, corrosive pollutant deposition, and cracks result in significant power losses in the power transmission system. Using a simple three-step sprayable coating technique, we propose a novel superhydrophobic material for high-voltage insulator surface protection with water absorption resistance, self-cleaning, icephobic, and crack healing capabilities. An adhesive polydopamine layer sprayed on an insulator surface to predevelop a macro−nano hierarchical surface based on an oleic acid/nano-SiO 2 composite with an oleic acid infusion arrangement is a crucial endurance technique. The technique shows less than 3% water absorbance, more than 150°contact angle, less than 2°contact angle hysteresis, self-cleaning ability, ice-phobic with a minimum ice adhesion strength of 15.5 ± 9.9 kPa, and crack-healing characteristics after corrosive, thermal, and mechanical aging. Such sustainable, long-lasting, and facile techniques would find widespread applications in the power, civil, marine, and aviation industries.

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The impact of cap orientation on mechanical strength of high voltage devices and a novel design for improvement

Cited by 2 publications

References 23 publications

Study on the Ultimate Load Failure Mechanism and Structural Optimization Design of Insulators

Study on the Ultimate Load Failure Mechanism and Structural Optimization Design of Insulators

Sprayable Superhydrophobic Polydopamine-Modified Oleic Acid/Nanoscale SiO₂Composites for Insulator Protective Coatings

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The impact of cap orientation on mechanical strength of high voltage devices and a novel design for improvement

Cited by 2 publications

References 23 publications

Study on the Ultimate Load Failure Mechanism and Structural Optimization Design of Insulators

Study on the Ultimate Load Failure Mechanism and Structural Optimization Design of Insulators

Sprayable Superhydrophobic Polydopamine-Modified Oleic Acid/Nanoscale SiO2Composites for Insulator Protective Coatings

Contact Info

Product

Resources

About

Sprayable Superhydrophobic Polydopamine-Modified Oleic Acid/Nanoscale SiO₂Composites for Insulator Protective Coatings