Project start: January 2007
Abstract
Power transformer is a vital element of the electric power system, which enables a stable and reliable electricity supply. Electromagnetic phenomena (electromagnetic leakage fields, i.e. additional losses in metal parts, local heating of metal parts) in a high-rated power transformer significantly determine its operational reliability and life-time.
The large transformer (in particular the generator transformer and autotransformer) is a highly efficient electrotechnical device with the strong concentration of the electromagnetic field along its constituent elements. This may lead to intense local heating of the metal parts, causing transformer damage or its longer turn off from the power electric system with high direct or indirect costs.
The objective of the research is to develop procedures for the application of 3D mathematical modelling of the electromagnetic field during the design and construction phase of large transformers. This would increase the transformer reliability and reduce its manufacturing and maintenance costs.
Research will be conducted on the electromagnetic field and additional losses in a tank, magnetic shields, windings, core clamping system and core sheets. Moreover, detailed research on the impact of winding types and high current leads on electromagnetic field and additional losses will be performed carried out as well. Experimental verification on appropriate models and real objects is also foreseen in the frame of the research. Eventually, algorithms and technical basis for the application of new solutions in transformer development and enhancement will be developed.