METHOD OF FILTERING MAGNETISING CURRENT AND REPRODUCTION OF SECONDARY CURRENT OF POWER AND MEASURING VOLTAGE TRANSFORMERS Russian patent published in 2016 - IPC H01F27/42 H01F38/28 

FIELD: electronic equipment.

SUBSTANCE: invention can be used in various facilities of relay protection, emergency control power systems, measuring, recording of emergency events and diagnosing state of equipment. Method of transformer magnetising current filtering and secondary current reproduction includes making system of nonlinear equations reflecting real electromagnetic physical processes in transformer, selection of primary and secondary transducers for connection to power system, as well as analogue and digital elements for arrangement of computation process, method selection for solving system of equations in real time using closed tracking system, at output of which voltage is generated proportional to magnetising current and reproducing secondary current in analogue or digital form, computing process is additionally controlled, monitoring tracking error.

EFFECT: reduced error of magnetisation current filtration and reproduction of secondary current in transition and steady-state modes of transformer, improving stability and expansion of linear range parameters both transformer, and components serially connected with it.

1 cl, 4 dwg