公开(公告)号：WO1996012969A1

公开(公告)日：1996-05-02

申请号：PCT/US1995012739

申请日：1995-10-12

Applicant: ABB POWER T & D COMPANY INC.

Inventor： ABB POWER T & D COMPANY INC. ,  CALERO, Fernando

IPC: G01R25/00

CPC classification number: G01R19/0038 ,  G01R19/25 ,  G01R19/2513 ,  G01R21/133 ,  G01R25/00 ,  G01R31/02 ,  H02H3/003 ,  H02H3/38 ,  H02H3/382 ,  H02H3/385 ,  H02H3/402

Abstract: A numerical comparator (20) is disclosed. The numerical comparator (20) employs numerical techniques based upon the behavior of the cylinder unit (18) to compare phasors in real time. In one application of this invention, the torque signal generated by the numerical comparator, Mk+1, is employed to determine whether a fault has occurred in a transmission line. Another application involves employing the output Mk+1 to determine the direction of power flow in the transmission line. In yet another application, the output Mk+1 is used to determine whether a voltage or current has exceeded a predetermined threshold.

Abstract translation: 公开了一种数字比较器（20）。 数值比较器（20）使用基于气缸单元（18）的行为的数值技术来实时比较相量。 在本发明的一个应用中，由数字比较器Mk + 1产生的转矩信号用于确定传输线路中是否发生故障。 另一个应用包括采用输出Mk + 1来确定传输线中的功率流的方向。 在另一应用中，输出Mk + 1用于确定电压或电流是否已经超过预定阈值。

公开(公告)号：EP0787304A1

公开(公告)日：1997-08-06

申请号：EP95935716.0

申请日：1995-10-12

Applicant: ABB POWER T & D COMPANY INC.

Inventor： CALERO, Fernando

IPC: G06F7 ,  G01R19 ,  G01R25 ,  G01R31 ,  G06F1 ,  H02H3 ,  G01R21

CPC classification number: G01R19/0038 ,  G01R19/25 ,  G01R19/2513 ,  G01R21/133 ,  G01R25/00 ,  G01R31/02 ,  H02H3/003 ,  H02H3/38 ,  H02H3/382 ,  H02H3/385 ,  H02H3/402

Abstract: A numerical comparator (20) is disclosed. The numerical comparator (20) employs numerical techniques based upon the behavior of the cylinder unit (18) to compare phasors in real time. In one application of this invention, the torque signal generated by the numerical comparator, Mk+1, is employed to determine whether a fault has occurred in a transmission line. Another application involves employing the output Mk+1 to determine the direction of power flow in the transmission line. In yet another application, the output Mk+1 is used to determine whether a voltage or current has exceeded a predetermined threshold.