METHOD OF CURRENT STABILISATION IN SERIES OF ALUMINIUM ELECTROLYTIC CELLS Russian patent published in 2008 - IPC H02M7/00 G05F1/10 

FIELD: power engineering.

SUBSTANCE: method consists in automatic control of power thyristors of rectifying device by results of current value measurement in load, at that rectifying device is formed for total power that exceeds the rated value for this design of electrolytic cells, from several rectifying units, the power of which exceeds the nominal value for this design of electrolytic cells, every rectifying unit contains power three-phase transformers, output windings of which via thyristors and shunts are connected to the total load of rectifying device, and control of thyristors is carried out by the value of available current value deviation in load from preset setpoint, the value of which is set in central automated control system, deviations of available current value from the setpoint are determined according to the difference between measured voltage in shunt of rectifying unit and voltage of setpoint, time of rectifying unit thyristors start (time of thyristors opening) is formed by value of difference.

EFFECT: stabilisation of current value in load at significant stochastic changes in load resistance.

2 dwg