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Composition Analysis of Operating Insulator Contamination Based on Hyperspectral Imaging Technology
Conference on Electrical Insulation and Dielectric Phenomena, 2019Pollution flashover is still one of the main causes of power system faults, especially for outdoor insulators. More studies have shown that because of the differences of contamination composition and proportion, the flashover characteristics are ...
Changjie Xia +7 more
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Switching Surge Performance of Contaminated Insulators
IEEE Transactions on Power Apparatus and Systems, 1971The "wet contaminant" test method, originally developed for use with alternating voltage, is extended for use with switching surges. In order to evaluate insulators under conditions where dry bands would form, it was found necessary to first energize the contaminated insulators with alternating voltage before applying the surges.
B. Macchiaroli, F. Turner
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Insulator surface contamination
Electrical Engineering, 1948ONE OF THE major unsolved problems in the insulation of electric power lines is that of obtaining trouble-free operation under conditions of severe atmospheric contamination. The presence of conducting film on the surface of outdoor insulators subjected to high voltage leads to a number of serious results. This may be summarized briefly as follows:
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Surface discharges on contaminated epoxy insulators
IEEE Transactions on Electrical Insulation, 1989Moisture layers with low layer conductivity are characterized by low power dissipation, e.g. 50 mW for the epoxy resin model post insulator under investigation. Under those conditions, no temperature-related dry zones appear, but micro partial discharges (PDs) cannot be excluded.
D. Konig, I. Quint, P. Rosch, B. Bayer
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IEEE transactions on dielectrics and electrical insulation
Accurate and real-time monitoring of the surface contamination status of insulators is of great significance for preventing pollution flashover accidents and maintaining system safety.
Yunpeng Liu +4 more
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Accurate and real-time monitoring of the surface contamination status of insulators is of great significance for preventing pollution flashover accidents and maintaining system safety.
Yunpeng Liu +4 more
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IEEE Sensors Journal, 2018
The service condition of the overhead line insulators is significantly affected by the contamination deposited on the insulator surfaces. The reliability of transmission lines is therefore affected in the case of insulator failures.
Suhas Deb +4 more
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The service condition of the overhead line insulators is significantly affected by the contamination deposited on the insulator surfaces. The reliability of transmission lines is therefore affected in the case of insulator failures.
Suhas Deb +4 more
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Flashover voltage of contaminated insulators
Conference Record of the 1988 IEEE International Symposium on Electrical Insulation, 2003Methods have been developed for the calculation of flashover voltage of contaminated circular strip models and outdoor insulators of practical but simple geometric shape. The criteria for discharge elongation and the assumptions made are examined. A typical flow diagram of the programs for evaluating the critical values using the equations derived is ...
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Contamination of HVDC insulators
2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES), 2016The Relatively failure rate of HVDC line insulators is 10–25 times higher than in corresponding AC lines. The main reason for this are surface erosion, ion migration and voltage distribution. A special samples preparation technique was used for conducting ageing tests.
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Design of insulators for severe contamination
Proceedings of 5th International Conference on Properties and Applications of Dielectric Materials, 2002Under severe contamination, typified either by sand dust storm or heavy salt fog ceramic insulators experience problems such as high leakage current, burning of crossarms and flashover. Several years of field tests in heavily polluted areas around the world have demonstrated that hybrid insulators with highly protected creepage designs are very ...
R.J. Chang +4 more
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Non-Ceramic Insulators for Contaminated Environments
IEEE Transactions on Power Apparatus and Systems, 1981Non-ceramic insulators with polymer weather sheds were evaluated for applications in contaminated environments. Insulator design, material properties and construction of the weather shed component are discussed in terms of the effects of leakage current and erosion that accompany the deposition of contaminants and moisture. The deterioration of the EPR
E.A. Cherney, D.J. Stonkus
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