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A dynamic thermal based reliability model of cast-resin dry-type transformers

Azizian, D ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/POWERCON.2010.5666453
  3. Abstract:
  4. In this paper, some models have been introduced for dynamic thermal modeling of cast-resin transformers which are based on genetic algorithm. A typical 400kVA cast-resin transformer has been selected and the model parameters are estimated and validated with the help of experimental data extracted from different load cycles. The estimated models are used to generate a reliability model for cast-resin dry-type transformers and the effects of variation in load, ambient temperature and atmosphere conditions on the reliability of castresin transformer are illustrated. As it will be shown in this paper, the effects of working conditions on the life-time of insulation in dry-type transformers is very considerable and because of highest temperature range (in comparison with oil-immersed transformer), reliability is more sensitive to variation of load, ambient temperature and atmosphere conditions
  5. Keywords:
  6. Dry-type transformers ; Ambient temperatures ; Cast-resin dry-type transformer ; Dry-type transformer ; Dynamic thermal modeling ; Estimated model ; Experimental data ; Highest temperature ; Life-times ; Load cycle ; Model parameters ; Oil immersed transformers ; Reliability model ; Working conditions ; Genetic algorithms ; Innovation ; Oil filled transformers ; Power generation ; Reliability ; Resins ; Thermoanalysis ; Atmospheric temperature
  7. Source: 2010 International Conference on Power System Technology: Technological Innovations Making Power Grid Smarter, POWERCON2010, 24 October 2010 through 28 October 2010 ; 2010 ; 9781424459407 (ISBN)
  8. URL: http://ieeexplore.ieee.org/document/5666453