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Application of Salt Fog Test and Lifetime Evaluation of Silicone Rubber Insulators in Atmospheric Conditions with Contamination and Humidity

Eshaghi Maskouni, Mahdi | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52503 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Vakilian, Mehdi
  7. Abstract:
  8. Electricity distribution companies always strive to operate the power network efficiently and reliably so that their network be able to satisfy the growing needs for electricity. To achieve these goals in a power network, a comprehensive asset management plan with a sound policy for inspection, periodic maintenance, replacement, and disposal of depreciated equipment is required. One of the high-risk sectors of the electricity grid is the insulation section of distribution and transmission lines. In recent years, composite insulators have been used more widely because of their desirable characteristics such as: hydrophobicity, lower price, and lower weight if compared with the another insulators which make them more attractive than other types of insulators. The output of "insulation condition assessment" of these insulators is employed to develop an asset management plan; which involves: inspection plan, condition monitoring, determination of the aging stage, early failure predictions, washing schedules, lifetime evaluation, and repair strategies. Various condition monitoring methods are used in this work, such as: measuring the contact angle of water droplets on the insulator’s surface, scanning electron microscopy (SEM), FTIR test, TGA test, and leakage current analysis to determine the degradation process and the aging rate of composite insulator. Finally, the asset management algorithm and the lifetime evaluation algorithm of these insulators is presented on the basis of insulation condition assessment, and then they will be applied to a number of new insulators and insulators operated in the electricity grid
  9. Keywords:
  10. Life Time ; Hydrophobicity ; Asset Management ; Monitoring System ; Composite Insulators ; Silicone Rubbers

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