In this PhD thesis is devoted to the development of a methodology for virtual-physical testing of traction electrical equipment, taking into account the individual design parameters of power equipment. Evaluating the topicality of the dissertation topic, the normative base of traction electrical equipment testing methods has been studied in detail. The dissertation gives a description of mathematical modeling of electrical equipment operation, as well as describes the identification of electrical equipment parameters. The developed methodology ultimately allows to determine the functional compliance of traction power equipment to critical conditions that would be possible during operational testing and operation during the electrical equipment design and factory testing stages. The work includes theoretical calculations, computer modeling tasks, and practical experiment results. The doctoral thesis is written in Latvian, it has an introduction, III. chapters, conclusions and recommendations, appendices and bibliography. Thesis consists of 50 figures, 6 tables, total 110 pages. The bibliography indicates 97 sources of used literature.