公开(公告)号：US20180242411A1

公开(公告)日：2018-08-23

申请号：US15579796

申请日：2016-05-26

申请人： HATCH LTD.

发明人： Dong SHEN ,  Michael Morgan CAMPBELL ,  Jason CHEUNG ,  James WIKSTON

IPC分类号： H05B7/148 ,  F27B3/28 ,  F27B3/08

CPC分类号： H05B7/148 ,  F27B3/085 ,  F27B3/28 ,  F27D11/08 ,  F27D19/00 ,  F27D21/00 ,  H02J3/1864 ,  Y02P10/256 ,  Y02P10/259

摘要： It is proposed herein to employ thyristor firing angles as a fast prediction of flicker in power supply for an electric arc furnace. It is further proposed to actively modify operating variables for the electric arc furnace to maintain the flicker below a predefined threshold. Aspects of the present application use the thyristor firing angles in combination with control ranges of variable reactance devices to predict the flicker severity level generated by the electric arc furnace with thyristor-controlled variable reactance devices. Based on the predicted flicker level, at least one operating variable of the electric arc furnace may be changed, if required, to maintain flicker to acceptable limit.