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

Abstract

The report reflects the promising solutions for the creation of adaptive protection means and emergency automatics in the implementation of methods of identification of dynamic systems. Presented original research assigned at directly addressing the causes of the sensitivity lack of the transformer equipment protection - compensation for the magnetizing current of the power transformers by linearizing their transfer characteristics.

A Method for Dynamically Identifying Equivalent Mathematical Model Parameters of Power Electronic System Based on Digital Filter

“…The article uses a fundamentally new concept introduced -"generalized analytical signal of voltage (current) of a three-phase system". It is based on the well-known filter (figure 1) of symmetric components in relation to complex analytical signals of phase voltages or currents [1][2][3][4][5][6][7][13][14][15][16][17][18]: The filter circuit (figure 1) is connected to the corresponding phase terminals A, B, C of the voltage measuring transformers. Orthogonal additions of analytical phase signals are obtained at the output of the Hilbert filter with the impulse response h(t) = 1/(πt):…”

“…In this case, the circuit is connected to the measuring terminals of the phase current transformers. The results of studies of this and similar current filters are described in detail in publications [1][2][3][4][5][6][7][8][9][10][11][12][15][16][17][18].…”