Effect of non-uniform pollution on the withstand characteristics of extra high voltage (EHV) suspension ceramic insulator string

Sima, Wenxia; Yuan, Tao; Yang, Qing; Xu, Ke; Sun, Caixin

doi:10.1049/iet-gtd.2009.0387

Cited by 57 publications

(40 citation statements)

References 8 publications

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“…(2) shows that, when T/B < 1, SDD B > SDD and SDD T <SDD. The top and bottom surface of the samples were all uniformly coated with NaCl in the tests, so their surface pollution layer conductivity (SPLC) is directly proportional to SDD when they are at the same temperature and saturated sufficiently [12]. In other words, an increase of T/B causes the layer conductivity of insulator top surface to decrease, and the bottom surface vice versa.…”

Section: Relationship Between T/b and Splcmentioning

confidence: 99%

“…Thus some researches were conducted to discuss the performance of non-uniform contamination on top and bottom surfaces, as well as its influence on insulator flashover [4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…for the correction of dc flashover voltage under nonuniform pollution, and got that the correction coefficient (C) was in the range of 0.29-0.47; in [12], another research found that the formula of EPRI is also applicable in ac case and the value of C was obtained as 0.31. Some works of the non-uniform pollution have been done around the world, and the related data in specific to certain kinds of insulators were referable in outdoor insulation design.…”

Section: Introductionmentioning

confidence: 99%

“…However, their results are of some discrepancy. For example, in [10], the value of C for ceramic insulators ranges from 0.24 to 0.29 and for glass insulators it ranges from 0.18 to 0.20, while in [12], the correction coefficient C for ceramic insulators is in the range of 0.21-0.37. Therefore, more tests were needed to provide detailed information for the selection of correction coefficient.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Non-uniform Pollution on the AC Flashover Performance of Suspension Insulators

Zhang¹,

Jing²,

Donghong³

et al. 2016

Journal of Electrical Engineering and Technology

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-The non-uniform distribution of contamination on insulator surface has appreciable effects on flashover voltage, and corresponding researches are valuable for the better selection of outdoor insulation. In this paper, two typical types of porcelain and glass insulators which are widely used in ac lines were taken as the research subjects, and their corrections of AC flashover voltage under nonuniform pollution were studied. Besides, their flashover characteristics under different ratio (T/B) of top to bottom surface salt deposit density (SDD) were investigated, including the analysis of flashover voltage, surface pollution layer conductivity and critical leakage current. Test results gave the modified formulas for predicting flashover voltage of the two samples, which can be directly applied in the transmission line design. Also, the analysis delivered that, the basic reason why the flashover voltage increases with the decrease of T/B, is due to the decrease of equivalent surface conductivity of the whole surface and the decrease of critical leakage current. This research will be of certain value in providing references for outdoor insulation selection, as well as in proposing more information for revealing pollution flashover mechanism.

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Section: Relationship Between T/b and Splcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Non-uniform Pollution on the AC Flashover Performance of Suspension Insulators

Zhang¹,

Jing²,

Donghong³

et al. 2016

Journal of Electrical Engineering and Technology

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show abstract

“…The surface contamination and moisture of insulators, which is largely used in power system, seriously affects the electrical properties of insulators, brings the risk of grid flashover accidents, and endangers the safe operation of power grid [1][2][3]. Currently, pollution flashover accident is one of the main factors of electric power accidents in China.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Study on the Drawing of the Electronic Polluting Area Map

Luo

Huang

Cai

et al. 2012

2012 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring

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With the quantitative analysis of pollution area mapping rules and business functions of the modular design by means of geographic information systems technology, computer software and other key technologies, this paper preliminary makes the overall framework of the standard drawing of electronic pollution area distribution mapping, and proposes to build the hardware and software operating platform, database structure design standards and form of generation of electronic pollution area mapping.

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Correction of flashover voltage of catenary insulators based on analysis of soluble salt compositions in saline‐alkali region

Wang

Liu

et al. 2020

IEEJ Transactions Elec Engng

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Calcium sulfate and other slightly soluble salts in the natural pollution of catenary insulators could result in differences in flashover voltages between artificially and naturally polluted insulators at the same salt deposition density. Based on the insulator pollution characteristics in saline‐alkali areas and the saturated water absorption of polluted insulators, the equivalent salt deposit density and nonsoluble deposit density of insulators are corrected according to the influence of other coexisting soluble salts on the solubility of calcium sulfate. The correction formula of the insulator flashover voltage is proposed, which considers the equivalent salt deposit density, nonsoluble deposit density and pollution components. The results from the correction formula are compared with the experimental data from the artificial pollution test of the ceramic cap and pin insulator. The results show that salt‐alkali areas are more easy to flashover than other areas. The remaining pollutants can change the conductivity of the pollutant layer by inhibiting or promoting the dissolution of calcium sulfate. Moreover, its effect on the flashover voltage cannot be ignored. The error between the calculated value based on the correction formula and the experimental data is below 6%. A pollution flashover warning mechanism based on relevant meteorological data is proposed. The results can be used as an important reference for the operation and maintenance of catenary insulators in saline‐alkali areas. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Effect of non-uniform pollution on the withstand characteristics of extra high voltage (EHV) suspension ceramic insulator string

Cited by 57 publications

References 8 publications

Effects of Non-uniform Pollution on the AC Flashover Performance of Suspension Insulators

Effects of Non-uniform Pollution on the AC Flashover Performance of Suspension Insulators

Preliminary Study on the Drawing of the Electronic Polluting Area Map

Correction of flashover voltage of catenary insulators based on analysis of soluble salt compositions in saline‐alkali region

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