Surface micro-crack initiated brittle fracture in fiber reinforced plastic rod of composite insulator

Liang, Xidong; Wang, Jiafu; Dai, Jianjun

doi:10.1109/tdei.2010.5448090

Cited by 20 publications

(7 citation statements)

References 19 publications

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“…Composite insulators are widely used in overhead transmission lines all over the world, owing to their advantages of light weight, excellent contamination flashover resistance, high mechanical strength and easy installation and maintenance [1][2][3][4]. In recent years, decay-like fracture of composite insulator [5][6][7][8], a new type of fracture which is different from normal fracture [4] and brittle fracture [9][10][11][12], has appeared in China and Korea. An abnormal temperature rise of the composite insulator, which was reported as the early stage of decay-like fracture of composite insulator [5][6][7], has drawn the close attention of the operation and maintenance department of the power grid.…”

Section: Introductionmentioning

confidence: 99%

Study on heating mechanism of GRP rod in a composite insulator

Yuan

Jiang

et al. 2019

IET Science, Measurement & Technology

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Section: Introductionmentioning

confidence: 99%

Study on heating mechanism of GRP rod in a composite insulator

Yuan

Jiang

et al. 2019

IET Science, Measurement & Technology

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“…Exposed to external environment in long-term field operation, line insulators suffer from a variety of weather conditions, high electric field and a strong mechanical load. The aging and performance deterioration of composite insulators have become increasingly concerned issues with the growth of the operating time [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of moisture on temperature rise of composite insulators operating in power system

Gong

Wang

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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The local heating phenomenon of composite insulator has drawn more and more attention gradually. From our analysis, the temperature rise of composite insulator is closely related to the moisture in atmospheric environment according to research results. Effect of moisture on the temperature rise of composite insulators is studied in this paper. The composite insulators, which have operated in power system for a long time and have been detected for local heating, and new insulator are taken as test samples. The temperature rise of operated composite insulators, which have been detected for local heating, increases with the rise of the relative humidity, while new insulator shows no temperature rise can be detected. The temperature rise of sample is not relevant to the core and the interface between core and housing material practically, but the high voltage end housing. The moisture content of the housing material is different at various relative humidity, and this leads to difference in dielectric loss, which is a significant source of local heating phenomenon. The difference of dielectric loss at different relative humidity leads to the temperature rise variation with the relative humidity.

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“…The mathematical model of the mechanical strength of composite insulators is shown in Fig. 10, which comes from the IEC 61109 standard [18]. It is noticeable that failing load decreases gradually with time, but it is always above a horizontal line which is called damage limit.…”

Section: Discussionmentioning

confidence: 99%

“…There are some verification tests for newly produced composite insulators. The IEC 61109‐2008 standard contains the verification of the specified mechanical load (SML) [18]. GB/T 19519‐2014 describes the stress‐corrosion test for composite insulator rods [19].…”

Section: Introductionmentioning

confidence: 99%