Distribution of electric and magnetic fields in 110-kV outdoor switchgears

Ковалев, Д. И.; Borisov, R. K.

doi:10.3103/s1068371216080046

Cited by 2 publications

(1 citation statement)

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“…Porcelain column high-voltage disconnector is mainly used to provide an electrical interval during the maintenance of electrical equipment, which is a clearly visible disconnect point to ensure the personal safety of maintainers. 1,2 Most porcelain column high-voltage disconnectors work directly in the outdoor environment, thus are subject to the erosion of wind, frost, rain, and snow. Besides, a few attention has been paid to the daily maintenance and repair due to their relatively simple structure and low cost, resulting in frequent faults and defects, 3,4 such as mechanical defects, 5 conductive loop overheating, 6 secondary circuit defects, 7 and insulator damage defect.…”

Section: Introductionmentioning

confidence: 99%

Mechanical defect detection of porcelain column high-voltage disconnector based on operating torque

Zhou

Ruan

Yang

et al. 2020

International Journal of Advanced Robotic Systems

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Currently, there is no effective detection and diagnosis technology for the frequently happened mechanical defects of disconnectors. A porcelain column high-voltage disconnector is taken as the object to study the influence of mechanical defects, including bearing jamming, axle pin jamming, and three-phase position asynchrony on the operating torque through geometric mechanics deduction. An operating torque detection technology is proposed, which could accurately measure the operating torque of the disconnector without destroying its original shafting. Using this technology, the operating torque curves of the disconnector in normal state and typical mechanical defect simulation states are measured and compared. The results indicate that the operating torque changes with the mechanical state of disconnector, and these changes could be quantified through the proposed detection technology. And the types of mechanical defects can be distinguished according to their different effects on the operating torque curve. Based on this, a practical mechanical defects diagnosis method is summarized to provide reference for maintainers to diagnose the mechanical defects of disconnectors.

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