METHOD FOR PREDICTING VECTOR ADJUSTMENT OF FOUR-QUADRANT TRANSFORMER Russian patent published in 2006 - IPC H02M7/48 H02M7/527 B60L9/12 

FIELD: electric engineering, in particular, technology for controlling input transformers of alternating-current electric train, for adjusting given parameters of four-quadrant transformer under conditions of alternating load.

SUBSTANCE: alternation of phase of current vector of network, consumed by four-quadrant transformer during load alternation, is predicted on basis of current value of phase of network current, current value of load and given value of load. Adjustment of transformer is performed in the area of allowed working parameters.

EFFECT: provision of precise determining of current vector phase of network of four-quadrant transformer during alternation of load, excluded unacceptable adjustment parameters, decreased requirements for adjustment system resources.

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