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Hiroo Konishi
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Ibaraki, JP
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last 30 patents
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Patent Grant
Apparatus for monitoring and stabilizing power swing in a power sys...
Patent number
5,710,492
Issue date
Jan 20, 1998
Hitachi, Ltd.
Hiroo Konishi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Electric power system stabilization control apparatus and method th...
Patent number
5,703,791
Issue date
Dec 30, 1997
Hitachi, Ltd.
Masahiko Amano
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Control equipment for high voltage direct current transmission syst...
Patent number
5,535,113
Issue date
Jul 9, 1996
Hitachi, Ltd.
Hiroo Konishi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power conversion system, and a method of power conversion using suc...
Patent number
5,396,411
Issue date
Mar 7, 1995
Hitachi, Ltd.
Hiroo Konishi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for controlling the output voltage of an AC el...
Patent number
5,349,522
Issue date
Sep 20, 1994
Hitachi, Ltd.
Hiroo Konishi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Reactive power compensator for electric power system
Patent number
4,897,593
Issue date
Jan 30, 1990
Hitachi, Ltd.
Hiroo Konishi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Converter control apparatus for parallel connected multi-terminal d...
Patent number
4,441,032
Issue date
Apr 3, 1984
Hitachi, Ltd.
Takeichi Sakurai
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC Transmission control system
Patent number
4,330,815
Issue date
May 18, 1982
Hitachi, Ltd.
Hiroo Konishi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC Power transmission control
Patent number
4,264,951
Issue date
Apr 28, 1981
Hitachi, Ltd.
Hiroo Konishi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Control method and system for an high voltage direct current system
Patent number
4,263,517
Issue date
Apr 21, 1981
Hitachi, Ltd.
Hiroo Konishi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER