On possibility of power transformer operational reliability increase

Dynamic methods of identification of electromagnetic parameters of power transformers in non-stationary mode

“…Considering this, the results of the study of adaptive compensation of magnetization currents of power transformers and displacement currents, which are typical for the extended intersystem (interstate) connections, are presented in [4][5][6][7][8][9][10]. Unlike with the currently existing stationary compensation solutions in [4][5][6][7][8][9][10][11][12][13][14][15][16][17], the use of additional software algorithms for identification of power equipment parameters is proposed. The proposed method allows to reduce the minimum tripping current to the level of 0.1-0.15 p.u.…”

“…Initially, this caused by the methodological error due to the insufficient mathematical rigor of the formulation of the research problem, and in some cases in using of unreliable primary (initial) parameters of the mathematical model during the performance of numerical experiments. All this inevitably causes errors in solving the problem when performing computational studies and can lead to subsequent misinterpretation of the obtained results, which is ultimately reflected in the erroneous view of the operation reliability and stability of the power system [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

“…Quite often, power sources of the examined electrical equipment are idealized, thereby introducing methodological roughness and possible distortions of the experimental results. However, due to the unjustified complication of the model and the inability to meet the computational performance requirements of modern microcontrollers, the use of a rigorous mathematical description of electrical power equipment transients may not be acceptable when solving the problem of improving and expanding of the functionality of microprocessor protection means and automatics [11][12][13][14][15][16][17][18].…”