Selection of Line Insulators With Respect to Ice and Snow—Part II: Selection Methods and Mitigation Options

Farzaneh, M.; Baker, A. C.; Bernstorf, R. A.; Burnhan, J.T.; Cherney, E.A.; Chisholm, William A.; Fofana, I.; Gorur, R.S.; Grisham, T.; Gutman, I.; Rolfseng, L.; Stewart, G. A.

doi:10.1109/tpwrd.2007.899540

Cited by 35 publications

(10 citation statements)

References 29 publications

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“…Many mitigation options for improving performance of icecoated insulators were set out and ranked in [8,[28][29][30][31][32]. Since that time, additional testing and field experience has been gained, and new technologies have evolved.…”

Section: Improved Insulator Icing Flashover Performancementioning

confidence: 99%

“…Panel sessions and presentations were also organized regularly by a number of other conferences on high voltage and insulation such as ISH (International Symposium on High voltage Engineering, ICHVE (International Conference on High Voltage and Application), IEEE Electrical Insulation Conference (IEC) and IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP). Considering the widespread use of EHV overhead networks in cold climate environments and the challenges of ultra-high-voltage (UHV) engineering, guidelines were recently proposed by IEEE toward the testing, design and selection of insulators subjected to icing [28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

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Insulator icing flashover

Farzaneh

2013

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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the insulator is a kind of important electric components, because it plays a role in electrical insulation and plays a supporting role in mechanical, power system and even the development of the whole society to a higher degree of dependence on the performance of insulators, the requirements are also rising. However, in recent years, China's domestic air pollution is serious, the weather conditions are complex, the icing flashover phenomenon has become a serious performance of insulator safety accidents. However, the proposed super hydrophobic materials in this paper, not only the anti icing flashover performance is better than the commonly used coating, and preparation process is sample, high performance, and low cost, which is expected to become a substitute for insulator coating now. the super hydrophobic coating is considered to be one of the important methods to solve the problem of flashover electrical equipment, so the study of high hydrophobicity flashover, super hydrophobic coating with high performance, simple process, low cost plays an important role in electrical equipment and power industry. In this paper, we will use a kind of method which is more powerful, graphene was prepared by electrochemical stripping and poly-two methyl siloxane in a certain proportion to prepare superhydrophobic surface. In this paper, the preparation of superhydrophobic surface, not only has excellent self-cleaning performance, but also has a very low corrosion current density. It is surprising that the superhydrophobic surface prepared by this method has good mechanical stability, and its surface can maintain the super hydrophobicity after the strong impact of the outside world. The method mentioned in this paper is not only capable of preparing a set of super hydrophobic surface self cleaning,mechanical stability is stable as a whole, it also provides a new idea for anti icing flashover of electrical equipment. 1. Introduction With the development of the electric power industry and the gradual improvement of the voltage level, the electrical equipment is playing a more and more important role in people's daily production and life. Of which the insulator is an important part of power system, however, the phenomenon of icing flashover has a great influence on the mechanical and electrical properties of insulators, which will threaten the stability and security of power system operation, resulting in huge economic losses. Take snow disaster in South China in 2008 as an example, the ice coating accidents spread to 13 provinces, State Grid economic losses in the accident up to 10 billion 450 million Yuan, and in daily life, line trip, outage accidents also occur caused by icing [1] , it causes a great impact on people's life. Therefore, it has become one of the most urgent problems to solve the problem of icing flashover. However, there are still a lot of defects in the deicing and anti icing methods currently used, and the efficiency is low and the energy consumption is large. Super hydrophobic coating is a kind of water ela...

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Section: Improved Insulator Icing Flashover Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Insulator icing flashover

Farzaneh

2013

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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“…Sleet, a form of freezing precipitation, and superstructure ice resulting from sea spray, are traditionally not classified as atmospheric icing, but they are similar in the processes of their formation. Ice buildup on high voltage power and distribution lines may lead to the mechanical failure of the cables or even lead to loss of insulation [23][24][25][26][27] and electric arcs or insulator flashovers between power lines and metallic supports, the latter being at ground potential entailing power outages and often incurring major costs. Ice or wet snow can cause serious problems which are due to their high adherence to both metallic and insulator surfaces over the entire area exposed.…”

Section: Icing In Nature and The 1998 Ice Stormmentioning

confidence: 99%

Preventing corrosion and ice accretion on aluminium surfaces applying organic and inorganic thin films /

Farhadi¹

2010

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Ice and wet-snow accretion on outdoor structures, including power transmission and distribution equipment, is a serious problem for regions experiencing icing conditions.Various de-icing and anti-icing techniques have been developed to date to counter this problem. Most of the techniques currently in use, however, including active de-icing methods, are employed only where accumulations are substantial. Passive approaches to the problem such as anti-icing or icephobic coatings which inhibit or retard ice accumulation on the surfaces are gaining in popularity.Metal corrosion should also be taken into account since metal or metallic alloys are subject to corrosion problems when placed in a humid or aggressive environment; the development of any ice-releasing coatings on Al structures, as they must be durable enough, is thus closely related to anti-corrosive protection of that specific metal.Consequently, this research has made an attempt to prepare coatings, either one layer or multi-layer, for use on polished AA6061 and AA2024 substrates combining the qualities of reduced ice adhesion and improved corrosion resistance. These two alloys are among the most widely used aluminium alloys in transportation systems (including aircraft), electric power industry, military, etc. Both the stability of the coatings in a humid environment and their overall ice-repellent performance was systematically studied.This research work has made a systematic approach to investigating the influence of surface roughness on the ice-releasing potential and the hydrophobic properties of the prepared coating surfaces. All coatings displayed a gradual loss of their hydrophobic properties after ~ 1000 h of immersion in water, and while corrosion of surfaces was also observed, except in the case of surfaces treated with permanganate conversion coatings which provided satisfactory anti-corrosive protection. IllAll flat coated surfaces demonstrated shear stress of ice detachment values which were at least ~ 1.5 times lower than uncoated mirror-polished Al surfaces and about ~ 2 times lower than those observed on as-received Al surfaces. The adhesion reduction factor (ARF) values decreased after as many as 12 icing/de-icing events, implying a certain amount of decay of the coatings.All rough superhydrophobic samples allowed for ice adhesion shear stress values of at least ~ 4 to 7 times lower than those obtained on the uncoated as-received Al surfaces. After 24 icing/de-icing experiments, however, ice adhesion strength increased significantly on those surfaces by a factor of ~ 2 after 24 icing/de-icing cycles.In addition, all flat and rough-coated surfaces gradually lost their hydrophobic properties after nearly each icing/de-icing cycle. Thus, the ice-releasing ability of all samples tested was found to be time-dependent.The work thus reveals that it is possible to prepare coatings which provide the reduced adhesion of ice to Al surfaces, while at the same time also providing some degree of anticorrosive protection.

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“…It also increases the possibility of low clearance between the adjacent high-voltage conductors or between conductors and ground cables towers [4,5]. Ice-covered insulators are more susceptible to have arcs and flashovers, which may incur voltage sags, spikes or even complete power loss [6][7][8][9][10]. As an example of catastrophic destructions from icing, one can refer to the storm that hit the southern parts of Quebec and Ontario and some states of USA in January 1998, downing several kilometres of power lines, causing the collapse of hundreds of steel towers and breaking thousands of wooden sub-transmission structures [2,5,11].…”

Section: List Of Figuresmentioning

confidence: 99%

“…An example is the mechanical failure of power transmission lines and towers due to the static load of accreted ice, or dynamic stresses of ice shedding or wind-induced galloping [2]. It can also lead to loss of insulation [6][7][8][9][10] and electric arcs or flashovers between power lines and metallic supports, the latter being at ground potential. Wind loads can deteriorate the situation by intensifying the stresses on the mechanical parts.…”

Section: Atmospheric Ice Accretion On Outdoor Equipmentmentioning

confidence: 99%

Nanostructured metal surfaces and their passivation for superhydrophobic and anti-icing applications =

Safaee¹

2008

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Selection of Line Insulators With Respect to Ice and Snow—Part II: Selection Methods and Mitigation Options

Cited by 35 publications

References 29 publications

Insulator icing flashover

Insulator icing flashover

Preventing corrosion and ice accretion on aluminium surfaces applying organic and inorganic thin films /

Nanostructured metal surfaces and their passivation for superhydrophobic and anti-icing applications =

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