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Tùy thuộc vào vị trí cài đặt của máy biến áp, sức mạnh của cấu trúc biến áp chống lại một tải trọng động đất cũng có thể cần phải được xác định chắc chắn. Thiết kế của xe tăng biến áp trở nên phức tạp do số phụ kiện và phụ kiện | 12 Recent Trends in Transformer Technology In the last one decade rapid changes and developments are being witnessed in the transformer design analysis manufacturing and condition monitoring technologies. The technological leap is likely to continue for the forthcoming years with the simultaneous increase in the power rating and size of transformers. There is ongoing trend to go for higher system voltages for transmission which increase the voltage rating of the transformers. The phenomenal growth of power systems has put up tremendous responsibilities on the transformer industry to supply reliable and cost-effective transformers. Any failure of a transformer or its component will not only impair the system performance but it also has a serious social impact. The reliability of transformers is a major concern to users and manufacturers for ensuring a trouble-free performance during the service. The transformer as a system consists of several components such as core windings insulation tank accessories etc. It is absolutely necessary that integrity of all these components individually and as a system is ensured for a long life of the transformer. The chapter identifies the recent trends in research and development in active materials insulation systems computational techniques accessories diagnostic techniques and life estimation refurbishment. The challenges in design and manufacture of the transformers are also identified. 12.1 Magnetic Circuit There has been a steady development of core steel material in the last century from non oriented steels to scribed grain oriented steels. The trend of reduction in 437 Copyright 2004 by Marcel Dekker Inc. 438 Chapter 12 transformer core losses in the last few decades is related to a considerable increase in energy costs. One of the ways to reduce the core losses is to use better and thinner grades of core steels. Presently the lowest thickness of commercially available steel is 0.23 mm. Although the loss is lower the .
