Practical and educational role of vector diagrams of power transformers

The analysis of scientific, technical and educational literature devoted to the methods of construction and use of vector diagrams of power transformers is carried out. Questions about their applicability in practical calculations remain open. The logic, unambiguity and correctness of the applied method of their construction is questionable. It is shown that vector diagrams of power transformers cannot be used in practical calculations, since they do not allow determining the values of the quantities characterizing the operation of the transformer, since it is impossible to depict all vectors on one diagram with the accuracy necessary for calculations. The applied order of diagram construction leads to an erroneous understanding of cause-and-effect relationships between physical processes in a transformer, contradicts accepted physical concepts and rules of electrical engineering. The requirements that vector diagrams must meet for their effective use for educational and methodological purposes are formulated. These requirements are achieved by applying the proposed new approach to the construction of vector diagrams.

Authors: A. G. Lavrov, V. A. Vasilev

Direction: Electrical Engineering

Keywords: power transformers, vector diagrams, the order of construction of vector diagrams, voltage drops, magnetic fluxes

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