Parametric studies and improved hypothesis of booster-shed effects on post insulators under heavy icing conditions

Ale-Emran, Sayyed Mahdi; Farzaneh, M.

doi:10.1109/tdei.2014.004619

Cited by 8 publications

(12 citation statements)

References 22 publications

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“…In order to obtain melting ice, the door of the climate room was opened to let the temperature increase above 0 °C. In the existing studies, the voltage distributions of the iced insulators were obtained by simulations [19][20][21], but the simulated results have not been validated by experiments. In this paper, a 50 kV voltage Ua was applied to the high-voltage terminal of the test insulators.…”

Section: Electric and Flashover Performance Evaluation Methodsmentioning

confidence: 99%

“…The detailed test procedure to determine U50 is shown in [23,29]. Provided that N is the number of test results, the first flashover voltage is marked with U1, the second one U2,and the Nth Un, U50 can be expressed as: In the existing studies, the voltage distributions of the iced insulators were obtained by simulations [19][20][21], but the simulated results have not been validated by experiments. In this paper, a 50 kV voltage U a was applied to the high-voltage terminal of the test insulators.…”

Section: Electric and Flashover Performance Evaluation Methodsmentioning

confidence: 99%

“…The booster sheds effects on the flashover performance of ice-covered post insulators have been studied using experimental and simulation methods [18]. An improved hypothesis or theory regarding the effects of booster sheds was proposed in [19], a method for booster sheds design using geometric modeling and the Taguchi method was presented in [20]. Till now, a lot of researches have been carried out to study the icing flashover performance and relevant improvement methods of the composite insulators.…”

Section: Introductionmentioning

confidence: 99%

“…However, not much work has compared the booster sheds' effects on the insulators' electrical and flashover performance under different icing conditions. Voltage distributions of the iced insulators were obtained by simulations [19][20][21], but the voltage distributions have not been studied using experimental methods. What is more, in recent years, composite insulators containing ZnO resistors have been used in regions where thunder and lightning happen frequently [22], however, little work has been done to study the influence of ZnO resistors on these insulators' electric and flashover performance under icing conditions.…”

Section: Introductionmentioning

confidence: 99%

“…When compared with the existing studies [19][20][21], voltage distributions of the test specimens were measured using experimental methods.…”

Section: Introductionmentioning

confidence: 99%

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Voltage Distribution and Flashover Performance of 220 kV Composite Insulators under Different Icing Conditions

Xie

Jiang

et al. 2018

Energies

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Abstract:Composite insulators are widely used in modern power systems to provide electrical insulation and mechanical support for transmission lines and substations. However, the insulation strength will decrease greatly under the combined conditions of ice-covering and contamination, and icing flashovers may take place under these serious conditions. In this paper, AC flashover tests of different artificially ice-covered 220 kV composite insulators were carried out in a multi-function artificial climate chamber under energized ice accumulation conditions. The test results indicate that, with the increasing of ice thickness, the flashover voltages decrease and tend to saturation. The icing flashover voltages can be increased by adding booster sheds, but excessive booster sheds can lead to lower flashover voltages under heavy icing conditions. The voltage distributions of the iced insulators were measured using experimental methods. The results show that, the air gaps withstand most of the applied voltage. The zinc oxide (ZnO) resistors that are contained in the insulators can influence the voltage distributions of the iced insulators, but have little affect on the icing flashover voltages. The work done in this paper can provide reference for the design and type selection of outdoor composite insulators in cold climate regions.

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Section: Electric and Flashover Performance Evaluation Methodsmentioning

confidence: 99%