Pollution Performance of DC Insulators under Operating Conditions

Cheng, T.C.; Wu, Chao; Rippey, J. N.; Zedan, F.M.

doi:10.1109/tei.1981.298414

Cited by 12 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the top surfaces of insulators in service are less contaminated than the bottom surfaces due to rain washing [14]. Previous research [15]- [18] has indicated that when the top surface is less contaminated, the flashover voltages are higher than with a uniform pollution distribution.…”

Section: E Flashover Characteristic With Non-uniform Contamination Dmentioning

confidence: 99%

Investigation on DC flashover performance of porcelain insulators in high altitude areas

Zhang

Wang

Guan

2008

2008 International Conference on Condition Monitoring and Diagnosis

View full text Add to dashboard Cite

In this paper, experimental studies were carried out to investigate the contamination characteristics of porcelain insulators in natural high altitude areas (1970 m). The experimental results indicate that the DC arcs have a significant effect on the flashover performance at high altitudes. The insulator profiles, suspension patterns and contamination distribution have a strong effect on the arc behaviors resulting in a big difference for the utilization ratio of leakage distance of the porcelain insulator, and this had a strong influence on the flashover voltages. In addition, the effect of non-soluble deposit density and contamination components (different kinds of salt) was also investigated for porcelain insulators. Non-soluble deposit density and contamination components also had a significant influence on the flashover voltages by changing the resistance of the contamination layer.

show abstract

Section: E Flashover Characteristic With Non-uniform Contamination Dmentioning

confidence: 99%

Investigation on DC flashover performance of porcelain insulators in high altitude areas

Zhang

Wang

Guan

2008

2008 International Conference on Condition Monitoring and Diagnosis

View full text Add to dashboard Cite

show abstract

“…Generally, the pollution on the top surface of the insulator sheds in service is lighter than that on the bottom surface due to rainfall [18]. Lots of studies indicate that the flashover voltage with a non-uniform top and bottom pollution distribution is higher than that in a uniform case [13,19].…”

Section: Effect Of Non-uniform Pollution Distribution On Flashover Vomentioning

confidence: 99%

Artificial pollution flashover performance of porcelain long rod UHVDC insulators at high altitudes

Yang

Hao

et al. 2014

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

Porcelain long rod insulators are recommended for outdoor insulation of UHV/EHV dc transmission lines because of their excellent service experience obtained in Central Europe. However, very few studies have been conducted on dc pollution flashover performance or the UHVDC insulators at high altitudes. Artificial pollution tests on 300 kN and above porcelain long rod insulators were carried out with dc voltage in natural high altitude areas (about 2000 m), in which the solid layer method was used and the 50% flashover voltage (U 50% ) was measured with the up-and-down method. Test results show that dc pollution flashover performances of the 300 and 400 kN insulators are similar. The exponents characterizing influence of salt deposit density on the flashover voltage vary from 0.46 to 0.57. A nearly linear relationship between the flashover voltage and the string length of the insulators is presented. Both double suspension strings and tension string patterns have a significant influence on the flashover voltage. The influence of non-uniform pollution distribution between the top and bottom surfaces of the insulator sheds on the flashover voltage is analyzed, and a correction coefficient for the insulators is proposed.

show abstract

“…In general, the top surfaces of insulators in service are less contaminated than the bottom surfaces due to rainfall [8]. Previous research [9][10][11][12] indicated that when the top surface was less contaminated, the flashover voltages were higher than with a uniform contamination distribution.…”

Section: Flashover Characteristic With Non-uniform Contaminationmentioning

confidence: 99%

Experimental investigation on flashover performance of glass insulator for DC transmission lines at high altitudes

Zhang

Mao

Wang

et al. 2007

2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena

View full text Add to dashboard Cite

This paper presents the results of an investigation on the DC flashover characteristic of contaminated glass insulators at natural high altitudes (1970 m). The arcing behavior on natural contaminated glass insulator surfaces was studied using a high-speed camera. The experimental results show that the DC arcs have a significant influence on the flashover performance of contaminated glass insulator since the DC arcs levitate more easily from the insulator surfaces at high altitudes than at sea level. The insulator profiles, contamination distribution condition, and suspension patterns (I-and Vstrings) have a strong effect on the arc behaviors resulting in an obvious difference for the utilization ratio of leakage distance of the glass insulator, and this has a strong influence on the flashover voltages.

show abstract

Pollution Performance of DC Insulators under Operating Conditions

Cited by 12 publications

References 1 publication

Investigation on DC flashover performance of porcelain insulators in high altitude areas

Investigation on DC flashover performance of porcelain insulators in high altitude areas

Artificial pollution flashover performance of porcelain long rod UHVDC insulators at high altitudes

Experimental investigation on flashover performance of glass insulator for DC transmission lines at high altitudes

Contact Info

Product

Resources

About