Study on AC pollution flashover performance of composite insulators at high altitude sites of 2800-4500 m

Jiang, Xingliang; Yuan, Jinying; Zhang, Zhijin; Hu, Qin; Cheng, Aijun

doi:10.1109/tdei.2009.4784559

Cited by 34 publications

(24 citation statements)

References 17 publications

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“…The experimental studies on a and c in different labs at home [2][3][4][28][29][30][31] are shown in Table II, while c obtained in researches abroad is 0.29-0.6 [32][33][34][35]. It can be concluded by comparing calculated results from the model with experimental results in Table II that a agrees well with all experiments, and c agrees well with experiments of Chongqing University but not so well with those of Tinghua University, which indicates that it is necessary to carry out more studies in the future.…”

Section: Discussion and Analysis Of The Modelmentioning

confidence: 99%

“…Figure 8 shows the exponent characterizing the influence of air pressure c under different b. It can be seen from Figure 8 and Equation (24) that c decreases with the increase of b when SDD is the same, which explains why the exponent characterizing the influence of air pressure c for composite insulator is bigger than that of porcelain and glass insulators [2]. Moreover, SDD affects the decreasing rate of c. Specially, with the increase of SDD, c drops more remarkably.…”

Section: Influence Of Hydrophobicitymentioning

confidence: 94%

“…[2], the pollution flashover voltage U f of insulator can be expressed as: Figure 6. Relationship between U n and local arc length x. where N and n are arc constants, s s is surface conductivity, and L is creepage distance.…”

Section: Physical-mathematical Model Of Polluted Insulatorsmentioning

confidence: 99%

“…Service experience and laboratory experiments have demonstrated that composite insulator has significantly higher flashover voltage than porcelain or glass insulator in polluted areas [1][2][3][4][5]. Composite insulator, a preference for power transmission lines in severely polluted areas, has been widely used.…”

Section: Introductionmentioning

confidence: 99%

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AC pollution flashover circuit model for composite insulator based on multiple arcs series

Shu

Yuan

Zhang

et al. 2010

Int Trans Elec Energy Syst

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SUMMARYWith the increasing application of composite insulator in the power system, pollution flashover often occurs. However, no model can exactly predict pollution flashover voltage of composite insulator at present. Based on high-speed photography of AC pollution flashover process, a model, which is in view of pollution severity, air pressure, shed configuration, and hydrophobicity level and which is suitable for composite insulator with any shed configuration, is proposed. Influences of pollution severity and hydrophobicity on flashover voltage and pressure characteristic exponent are analyzed, from which derives a calculative formula of flashover voltage. Calculated results from the model, validated by experiments, demonstrate that there is a power function relationship between flashover voltage and hydrophobicity level b, and characteristic exponent of hydrophobicity level b is the same as that of pollution severity. Meanwhile, the exponent characterizing the influence of air pressure increases with the fall of pollution severity and the rise of hydrophobicity.

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Section: Discussion and Analysis Of The Modelmentioning

confidence: 99%

Section: Influence Of Hydrophobicitymentioning

confidence: 94%

Section: Physical-mathematical Model Of Polluted Insulatorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

AC pollution flashover circuit model for composite insulator based on multiple arcs series

Shu

Yuan

Zhang

et al. 2010

Int Trans Elec Energy Syst

Self Cite

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show abstract

“…A great deal of research have been conducted in the transmission line antipollution measures at home and abroad, and many effective means of antipollution are proposed, such as RTV coating, composite insulator [1][2][3][4][5][6][7][8], antipollution detection [1,[9][10][11][12][13] and so on. In order to study the dirty ice flashover characteristics, the experiment conditions of many voltage levels, different insulator types, and various elevations have been considered [4][5][6][14][15][16]. Under these conditions, natural pollution accumulation rule of regional transmission line insulator is also obtained.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of the artificial contamination flashover characteristics of long insulator strings in 500 kV transmission lines

Zhu¹,

Sun²,

Gao³

et al. 2017

Proceedings of the 2nd Annual International Conference on Electronics, Electrical Engineering and Information Science (EEEIS 20

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The flashover voltage of short string insulator is different from long string insulator, and big error could be occurred when using flashover voltages of short string insulators to reckon the ones of long string insulators. In order to reduce this deviation, under the conditions of different equivalent salt deposit density (ESDD), non-soluble deposit density (NSDD), and uneven deposition filthy, XWP2-160 type with two umbrella porcelain insulators are used to obtain the characteristics of artificial filthy flashover voltages of the single hang string insulators, and the creepage distance effective coefficient of the type string insulators is calculated. The experimental results of V type, inverted V type insulators are compared with single hanging type string insulator, and the correction coefficient of the abnormal type insulator string is obtained. The results show that the flashover voltages of XWP2-160 type string insulators are inversely related to ESDD and NSDD, and the creepage distance effective coefficient of the type string insulators is 0.78. The maximal contamination resistance voltage of V shaped string and inverted V shaped string are larger than single hanging string insulator, and the string type correction coefficients is1.08 for V shaped string and 1.15 for inverted V shaped string respectively.

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DC performance of non-uniformly transversal polluted glass insulation under parallel electrical discharges’ effect

Bouchelga

Boudissa

Kornhuber³

et al. 2020

Electr Eng

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Study on AC pollution flashover performance of composite insulators at high altitude sites of 2800-4500 m

Cited by 34 publications

References 17 publications

AC pollution flashover circuit model for composite insulator based on multiple arcs series

AC pollution flashover circuit model for composite insulator based on multiple arcs series

Experimental analysis of the artificial contamination flashover characteristics of long insulator strings in 500 kV transmission lines

DC performance of non-uniformly transversal polluted glass insulation under parallel electrical discharges’ effect

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