DIRECT LOAD CURRENT SENSING FOR PREDICTED REGULATOR TAP POSITION
摘要
A tap changer including a tap positionable to vary the winding ratio of the transformer in response to changes in an electric load on the transformer is disclosed herein. The transformer includes an electric drive which is responsive to raise or lower signals applied thereto in order to selectively position the tap by the raising or lowering of the tap and thereby raising or lowering the transformer winding ratio. Upon sensing the current of the motor control signals, an up/down counter is incremented or decremented. Accordingly, when a tap change signal is detected, the direction of tap changer movement may be determined, based upon the value of the up/down counter. In this way the tap position is also accurately determined and known.
申请公布号
WO9701809(A1)
申请公布日期
1997.01.16
申请号
WO1996US08644
申请日期
1996.06.03
申请人
SIEMENS ENERGY & AUTOMATION, INC.
发明人
TRAINOR, JOHN, J.;LAPLACE, CARL, J.;THORSEN, WILLIAM, M., JR.