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Technical Economic Analysis Concerning Connection Groups of Distribution Transformers in Bulgaria
2024 23rd International Symposium on Electrical Apparatus and Technologies (SIELA)
Year: 2024 | Conference Paper |
Cited by: Papers (1)
In Bulgaria's electricity distribution system, there are over forty thousand power transformers in operation. This article deals with the types of connection of three phase distribution transformer windings and the behavior of the transformer under highly asymmetric loads and emergency modes in low-voltage networks. Transformers with Dyn connection are the most common in distribution networks in o...Show More
Changes of iron losses during the service of distribution transformers
2022 14th Electrical Engineering Faculty Conference (BulEF)
Year: 2022 | Conference Paper |
Cited by: Papers (2)
This article examines the issue of the increase in electrical energy losses in the iron cores of power transformers as a result of prolonged operation. A summary analysis of the results of measuring the losses of 200 pcs. power oil transformers after prolonged operation is provided. The results clearly show an increase in losses compared to the passport data provided by the manufacturing plant. Th...Show More
Conjugate Heat Transfer Analysis Using 3D FEM Model of an Oil-immersed Distribution Transformer
2018 International Conference on High Technology for Sustainable Development (HiTech)
Year: 2018 | Conference Paper |
Cited by: Papers (3)
Temperature field distribution in transformers active components and oil velocity variation in the tank are important for device properties and its duration of operation. From the point of view of designers and users, these characteristics of the transformers are considerable in determining the possibility of overloading and the consequences in the lifetime by exploitation at different temperature...Show More
Application of infrared thermography technique in transformers maintenance in distribution network
2017 15th International Conference on Electrical Machines, Drives and Power Systems (ELMA)
Year: 2017 | Conference Paper |
Cited by: Papers (8)
Reliable and accurate information about the condition of electrical equipment, obtained by thermographic surveys determines their wide use in the maintenance of distribution networks. Well maintained electrical equipment, especially transformers, is one of the main factors for ensuring uninterrupted power supply to the end users. The standard methods for faults diagnosis in most cases require the ...Show More
Thermal analysis using 3D FEM model of oil-immersed distribution transformer
2016 19th International Symposium on Electrical Apparatus and Technologies (SIELA)
Year: 2016 | Conference Paper |
Cited by: Papers (12)
The temperature distribution in the transformer interior is a significant parameter governing a transformer's performance and life expectancy. In the perspective of the user, temperatures in a transformer are important to determine the amount and duration of over load it can sustain, and to estimate the effects on the life of the transformer by operation at various temperatures. This paper present...Show More
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