Lifetime prediction of 20 kV field-aged silicone rubber insulators via condition assessment

Ahmadi-Joneidi, Iman; Akmal, Amir Abbas Shayegani; Mohseni, Hossein

doi:10.1109/tdei.2017.006253

Cited by 18 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After spraying the pollution suspension, the insulators were dried in ambient atmosphere for 24 h. For each of three pollution levels, this process was first performed on one insulator and the obtained pollution level was checked for being as the desired value. For this purpose, the polluted insulator was cleaned again using distilled water and its equivalent SDD (ESDD) and NSDD was calculated using following equations [36]: 3 (1)…”

Section: Test Setupmentioning

confidence: 99%

See 1 more Smart Citation

Circuit modelling of aged‐polluted polymer insulators based on measured leakage current characteristics

Goudarzi

Shahrtash

Gholami

2022

IET Science Measure & Tech

View full text Add to dashboard Cite

A new equivalent circuit model for aged‐polluted polymer outdoor insulators is proposed here. The structure of the model is constructed as such that it can be applied in investigating the effect of insulator aging and dry band discharge intensity on leakage current (LC) characteristics. To implement the capability of modelling aged insulators, the measured leakage currents from laboratory tests on field aged MV insulators with different level of aging and hydrophobicity were examined. Furthermore, the samples were artificially polluted and the corresponding measured leakage currents from laboratory tests were employed as references. The proposed circuit model can consider the effect of pollution by its topology and represents the aging phenomenon of insulator by the changes in the values of its elements. High similarity between test results and model outputs has confirmed model ability to represent aging effect on LC characteristics. Finally, mathematical equations for model parameters in terms of aging level are extracted using curve fitting, in order to predict the age and life‐time of polymer insulator.

show abstract

Section: Test Setupmentioning

confidence: 99%

“…Environmental stresses include ultraviolet radiation, heat, humidity, acidic or alkaline contaminations etc. Electrical stresses include corona discharge and dry band discharge which lead to tracking and erosion on insulator surface [3,4].…”

Section: Introductionmentioning

confidence: 99%

Circuit modelling of aged‐polluted polymer insulators based on measured leakage current characteristics

Goudarzi

Shahrtash

Gholami

2022

IET Science Measure & Tech

View full text Add to dashboard Cite

show abstract

“…On the basis of the balance between the content analysis and evaluation principles of the existing cable insulation life evaluation, a cable insulation life evaluation index system was established, and the insulation life evaluation was carried out using the fuzzy analytic hierarchy process [16,17]. rough the quantification process, the existing cable insulation characteristics are scientifically evaluated, and reference evaluation data are provided for the insulation characteristics of various types of cables under the influence of internal and external factors in different working environments [18,19]. is paper combines the advantages of the traditional analytic hierarchy process and fuzzy analytic hierarchy process to evaluate the insulation life of the cable from various influencing factors.…”

Section: Innovations In Is Papermentioning

confidence: 99%

Evaluation Model of Cable Insulation Life Based on Improved Fuzzy Analytic Hierarchy Process

Xian

Guo

2021

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Since the human society entered the electrification era, people’s work, life, and even the production and development of various industries in society are inseparable from the supply of electricity. The purpose of this paper is to establish a cable insulation life evaluation model based on the improved fuzzy analytic hierarchy process to test the current insulation characteristics and life of various types of cables, so as to ensure the quality of power supply and safe production of power. This paper first understands the cable insulation characteristics test process and electrical power-related knowledge through a large number of literature studies and consultation with power grid professionals. Then this paper combines the theoretical research and improvement of the fuzzy analytic hierarchy process based on the actual situation of the cable insulation characteristics, thereby constructing the cable insulation life evaluation model. In this evaluation model, this paper combines the fuzzy comprehensive evaluation method and the analytic hierarchy process as well as the actual situation of the cable characteristic test to analyze and predict the insulation life of the cable. Finally, the linear test and reliability estimation of the experimental results are carried out, and the application of this evaluation model is extended to the evaluation of insulation life of other types of cables. Based on this, this paper proposes a cable insulation life evaluation model based on the improved fuzzy analytic hierarchy process. This model combines the Weibull model and the Arrhenius model commonly used in the assessment of cable insulation aging life and the improved fuzzy analytic hierarchy process. Experiments have proved that, within a certain range, temperature factors have a significant impact on the cable insulation life. For example, when the temperature is below 55°C, the insulation life of the cable is usually 30 to 50 years. However, the evaluation model of the improved fuzzy analytic hierarchy process in this paper has much higher accuracy in evaluating cable insulation life than other life evaluation methods.

show abstract

“…Moreover, EPDM insulators filled with silicone low molecu-lar weight (LMW) constituents reported low values of leakage current and good hydrophobicity. Ahmadi-Joneidi et al [22] investigated the aging performance of 3 to 9 years' field-exposed 20 kV hightemperature vulcanized HTV-SiR/ATH insulators installed on overhead distribution lines in a coastal, highly humid and heavily polluted areas of Iran. The insulators remained exposed to harsh environmental conditions i.e.…”

Section: Field Experience Of Hvdc Composite Insulatorsmentioning

confidence: 99%

“…high humidity (80%), high UV radiations and salt deposition. Measurements of equivalent salt deposit density (ESDD), non-soluble deposit density (NSDD) and electrical conductivity were made as per IEC 60507 [23] to assess the site pollution severity based on classification given in [24] which are shown in Table 1 [22]. A lifetime of 18-24 year was predicted after condition assessment of these insulators using various physical (visual inspection), electrical (salt fog test, STRI hydrophobicity test), mechanical (Thermogravimetric analysis (TGA), Tensile test etc.)…”

Section: Field Experience Of Hvdc Composite Insulatorsmentioning

confidence: 99%

Global experience of HVDC composite insulators in outdoor and indoor environment

Akbar

Mehmood

2020

Reviews on Advanced Materials Science

View full text Add to dashboard Cite

High-voltage direct current (HVDC) transmission is known as green-energy transfer technology and has recently become an attractive alternative of high-voltage alternating current (HVAC) due to its high-power transmission capability and lower power loss. Use of composite insulators on direct current (DC) transmission lines experienced rapid growth in recent years due to their high hydrophobicity and better performance in contaminated environment than conventional ceramic insulators. During their service operation on DC lines, insulators are prone to more accumulation of contaminants due to unidirectional electric field. The contaminants under wet conditions allow leakage current to flow on the insulator surface. Being organic in nature, polymeric insulators have a tendency to age under the combined effects of electrical and environmental stresses. To fully understand the long-term aging performance of DC composite insulators, a detailed survey was considered necessary. Towards that end, this paper critically summarizes worldwide experience of aging performance of composite insulators in the field as well as in laboratory conditions.

show abstract

Lifetime prediction of 20 kV field-aged silicone rubber insulators via condition assessment

Cited by 18 publications

References 21 publications

Circuit modelling of aged‐polluted polymer insulators based on measured leakage current characteristics

Circuit modelling of aged‐polluted polymer insulators based on measured leakage current characteristics

Evaluation Model of Cable Insulation Life Based on Improved Fuzzy Analytic Hierarchy Process

Global experience of HVDC composite insulators in outdoor and indoor environment

Contact Info

Product

Resources

About