J & P Transformer Book, 13th Edition

Determination of resonance response

The Working Group considered that a very detailed analysis was necessary to get precise information about the resonance of a particular transformer. Three different approaches are possible – calculation, measurement or a combination of the two. The calculable number of harmonics depends on the degree of subdivision of the equivalent network. To get sufficient information about the spatial amplitude distribution demands a large number of elements. Elaborate computer programmes have to be used but the accuracy of the results still depends on the validity of the parameters inserted. From Fig. 6.56 it can be seen that a deviation from the resonance frequency of only a few per cent, considerably less than the ...