| 9564829 |
Converter arm and associated converter device |
Jürgen Häfner |
2017-02-07 |
| 8823413 |
Digital input with variable impedance |
Krister Nyberg, Tommy Segerbäck |
2014-09-02 |
| 8817444 |
Control arrangement |
— |
2014-08-26 |
| 8738331 |
Increased reliability in the processing of digital signals |
Krister Nyberg |
2014-05-27 |
| 8651878 |
I/O module |
— |
2014-02-18 |
| 8598887 |
Fault wave arrival determination |
— |
2013-12-03 |
| 8532144 |
Point-to-point communication in a high voltage power transmission system |
Krister Nyberg |
2013-09-10 |
| 8493866 |
Redundant computers and computer communication networks in a high-voltage power transmission system |
Krister Nyberg |
2013-07-23 |
| 8411400 |
Method and apparatus for mitigation of dynamic overvoltage |
Ulf Andersson, John Daniel, David L. Dickmander |
2013-04-02 |
| 8305095 |
Voltage measurements of electrically conducting elements in systems for controlling electrical processes |
Krister Nyberg |
2012-11-06 |
| 8305782 |
Redundant current valve control in a high voltage power transmission system |
Krister Nyberg |
2012-11-06 |
| 8300435 |
Transmission system and a method for control thereof |
Rolf Lungqvist |
2012-10-30 |
| 7062359 |
Substation control system |
— |
2006-06-13 |
| 6411067 |
Voltage source converters operating either as back-to-back stations or as parallel static var compensators |
— |
2002-06-25 |
| 6205039 |
Device for supervising a high voltage converter station |
Urban Astrom, Krister Nyberg, Roland Siljeström, Gunnar Asplund |
2001-03-20 |
| 6185116 |
HVDC power transmission system with cooling and switching device temperature detection |
Urban Astrom, Krister Nyberg, Roland Siljeström, Gunnar Asplund |
2001-02-06 |
| 6084787 |
Device for supervising in a high voltage converter station |
Krister Nyberg, Roland Siljeström, Urban strom, Gunnar Asplund |
2000-07-04 |
| 5969956 |
Method and a device for communication in a high voltage converter station |
Krister Nyberg, Gunnar Asplund, Roland Siljeström, Urban strom |
1999-10-19 |
| 5903155 |
Method of measurement for fault-distance determination on a HVDC power transmission line having at least two lines connected in parallel |
— |
1999-05-11 |
| 4377780 |
Means for damping mechanical torsional oscillations of an electric a.c. generator |
— |
1983-03-22 |