公开(公告)号：EP4346040A1

公开(公告)日：2024-04-03

申请号：EP22207618.4

申请日：2022-11-15

申请人： Hitachi Energy Ltd

发明人： NAIDU, OD ,  KHAN, Yasir Ullah ,  GEORGE, Neethu ,  PRADHAN, Vedanta

IPC分类号： H02H3/00 ,  G01R31/08 ,  G01R31/52 ,  H02H3/34 ,  H02H7/26

摘要： The present disclosure relates to a method for controlling a protection system for an electrical power system comprising a transmission line, the method comprising: determining a plurality of phase angle deviations based on network models of the electrical power system during respective faults of at least three faults; determining at least three phase angle ranges based on the plurality of phase angle deviations, wherein a sum of the at least three phase angle ranges is an angle of complete rotation; and controlling the protection system for the electrical power system based on the at least three phase angle ranges.

公开(公告)号：EP4327423A1

公开(公告)日：2024-02-28

申请号：EP22723688.2

申请日：2022-04-22

申请人： Hitachi Energy Ltd

发明人： NAIDU, Od ,  PATIL, Dinesh ,  GEORGE, Neethu ,  PRADHAN, Vedanta ,  MATURU, Suresh

IPC分类号： H02H1/00 ,  H02H3/40 ,  H02H7/26 ,  G01R31/08 ,  H02H3/44

公开(公告)号：EP4456359A1

公开(公告)日：2024-10-30

申请号：EP23178754.0

申请日：2023-06-12

申请人： Hitachi Energy Ltd

发明人： NAIDU, Obbalareddi Demudu ,  GEORGE, Neethu ,  PRADHAN, Vedanta

IPC分类号： H02H3/40

摘要： The present disclosure relates to a method for adaptively obtaining a corrected apparent impedance. The method comprises acquiring a current measurement and a voltage measurement in the power grid at the time of a fault, acquiring at least one line impedance parameter, obtaining a fault type, and adaptively obtaining a corrected apparent impedance dependent on the obtained fault type.

公开(公告)号：EP4427315A1

公开(公告)日：2024-09-11

申请号：EP22812672.8

申请日：2022-11-04

申请人： Hitachi Energy Ltd

发明人： NAIDU, Od ,  GEORGE, Neethu ,  ZUBIC, Sinisa ,  GAJIC, Zoran

IPC分类号： H02H3/40 ,  G01R31/08 ,  H02H7/28

CPC分类号： H02H3/405 ,  H02H7/28 ,  G01R31/085 ,  G01R31/52

公开(公告)号：EP4318836A1

公开(公告)日：2024-02-07

申请号：EP22196436.4

申请日：2022-09-19

申请人： Hitachi Energy Ltd

发明人： PRADHAN, Vedanta ,  GEORGE, Neethu ,  NAIDU, OD

IPC分类号： H02H3/40 ,  H02H1/00 ,  H02H7/28

摘要： The present disclosure relates to a method for controlling a protection system for an electrical power system comprising a transmission line terminated by a first terminal coupled to a first power source and by a second terminal coupled to a second power source, the method comprising: obtaining a plurality of voltage measurements and a plurality of current measurements of the first terminal; determining phase angle boundaries of a fault current based on the plurality of voltage measurements and the plurality of current measurements; determining a first apparent impedance based on a first phase angle within or at one of the phase angle boundaries starting from the first terminal; determining a second apparent impedance based on a second phase angle within or at one of the phase angle boundaries starting from the first terminal; determining a third apparent impedance and a fourth apparent impedance starting from the first terminal based on the first apparent impedance and the second apparent impedance; and controlling the protection system based on the third apparent impedance and the fourth apparent impedance. The present disclosure also relates to a respective device and computer-readable medium.